{"product_id":"huum-hive-15-electric-sauna-heater","title":"HUUM HIVE 15 15kW Electric Sauna Heater","description":"\u003cstyle\u003e.hhive15{--ink:#1A1410;--body:#463C33;--mut:#54493D;--accent:#96620A;--bright:#E8A33D;--dark:#171310;--sub:#54493D;--tint:#F7F1E6;--fill:#F0E9DB;--hl:#F6E7CB;--line:#DCCFB4;--warm:#DCCFB4;--edge:#CBBBA0;--rule:#DCCFB4;--r-lg:10px;--r-sm:10px;--r-xs:999px;--gut:20px;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;color:var(--body);line-height:1.65;letter-spacing:normal;-webkit-font-smoothing:antialiased;background:#fff}.hhive15 *{box-sizing:border-box}.hhive15 .hhive15-c img{margin:0 !important;border:0}.hhive15 .hhive15-c{max-width:1000px;margin:0 auto;padding:0 20px}.hhive15 section{padding:52px 0}.hhive15 section:first-of-type{padding-top:26px}.hhive15 section.hhive15-tinted{background:var(--tint)}.hhive15 section + section.hhive15-tinted,.hhive15 section.hhive15-tinted + section{border-top:1px solid 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(max-width:560px){.hhive15 .hhive15-ladder td:last-child::before{content:\"Nameplate draw:\\00a0\";font-weight:700;color:var(--ink)}}@media screen and (max-width:480px){.hhive15 table.hhive15-spec th,.hhive15 table.hhive15-spec td{display:block;width:auto}.hhive15 table.hhive15-spec th{border-bottom:0;padding-bottom:0}}.hhive15 .hhive15-vid .video-wrapper{position:absolute !important;inset:0;width:100%;height:100%;padding:0 !important;margin:0}.hhive15 .hhive15-vid video{position:absolute;inset:0;width:100%;height:100%;display:block;border:0;background:var(--dark);object-fit:cover}.hhive15 .hhive15-vid video:focus-visible{outline:3px solid var(--bright);outline-offset:-3px}.hhive15 .hhive15-fig{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--edge);background:#fff}.hhive15 .hhive15-fig img{width:100%;height:auto;display:block;border:0;border-radius:0;box-shadow:none;mix-blend-mode:multiply}.hhive15 .hhive15-c\u003efigure{max-width:560px;margin-left:auto;margin-right:auto}.hhive15 .hhive15-close p.hhive15-eyebrow{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;line-height:1.5}.hhive15 .hhive15-stat3 a{color:var(--bright)}.hhive15 .hhive15-faq summary h3{margin:0;font-size:inherit;font-weight:inherit;line-height:inherit;display:inline}.hhive15 .hhive15-cmp thead a .hhive15-cmp-here{color:var(--sub);font-weight:600;letter-spacing:.02em;text-transform:none}@media screen and (max-width:560px){.hhive15 .hhive15-ladder.hhive15-rooms td:last-child::before{content:\"Rated room:\\00a0\"}.hhive15 .hhive15-ladder.hhive15-out td:last-child::before{content:\"Output:\\00a0\"}}.hhive15 .hhive15-tw + p,.hhive15 .hhive15-tw + h3,.hhive15 .hhive15-warn + p,.hhive15 .hhive15-warn + h3,.hhive15 .hhive15-more + p{margin-top:24px}\u003c\/style\u003e\n\u003cdiv class=\"hhive15\"\u003e\n\u003csection id=\"overview\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cdetails class=\"hhive15-disc\"\u003e\u003csummary\u003eJump to\u003cspan class=\"hhive15-ct\"\u003e7 sections\u003c\/span\u003e\u003c\/summary\u003e\u003col\u003e\n\u003cli\u003e\u003ca href=\"#overview\"\u003eOverview\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#fit\"\u003eWill it fit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#parts\"\u003eWhat you need\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#electrical\"\u003eBreaker and wire\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#stones\"\u003eStone\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#faq\"\u003eQuestions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#order\"\u003eOrder\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\u003c\/details\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eFifteen kilowatts\u003c\/p\u003e\n    \u003ch2\u003eThe HUUM HIVE 15 is a 15 kW floor standing electric sauna heater for rooms of 530 to 813 cubic feet\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eThe HIVE 15 heats rooms of 530 to 813 cubic feet, on the same 22 1\/16 inch body as the HIVE 12.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-stat3\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"hhive15-lbl\"\u003eThe room\u003c\/p\u003e\n        \u003cp class=\"hhive15-big\"\u003e530 to 813 cu. ft.\u003c\/p\u003e\n        \u003cp\u003eLength by width by height, in feet. Add 3.3 cubic feet for every square foot of uninsulated glass, tile or brick wall, then size from the adjusted number.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"hhive15-lbl\"\u003eRated current\u003c\/p\u003e\n        \u003cp class=\"hhive15-big\"\u003e62.5 A at 240 V\u003c\/p\u003e\n        \u003cp\u003eHUUM's manual calls for two circuits, each on a 50 A breaker with 6 AWG cable. It is hardwired by a licensed electrician, who sizes the circuit to the National Electrical Code, which can call for more.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"hhive15-lbl\"\u003eThe rest of the order\u003c\/p\u003e\n        \u003cp class=\"hhive15-big\"\u003eControl and 16 boxes of stone\u003c\/p\u003e\n        \u003cp\u003eNeither is in the carton. A \u003ca href=\"\/products\/huum-uku-wifi-sauna-heater-control\"\u003eHUUM UKU control\u003c\/a\u003e runs the heater from outside the room, with the \u003ca href=\"\/products\/huum-uku-extension-box\"\u003eUKU extension box\u003c\/a\u003e at this output, and this heater holds 528 lb (240 kg) of \u003ca href=\"\/products\/huum-sauna-stones-5-10-cm\"\u003esauna stone\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"hhive15-tinted\" id=\"fit\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eSizing\u003c\/p\u003e\n    \u003ch2\u003eWill the HUUM HIVE 15 heat your sauna?\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eSauna heaters are sized on room volume, not floor area. Measure the room in feet and multiply length by width by height, then pick the heater whose published range contains that figure.\u003c\/p\u003e\n    \u003cp\u003eHUUM rates the HIVE 15 for \u003cstrong\u003e530 to 813 cubic feet\u003c\/strong\u003e on a 240 volt supply, and its manual warns that the warranty does not apply if the heater and room are dimensioned incorrectly.\u003c\/p\u003e\n    \u003cp\u003eCold surfaces change the answer. HUUM's manual says to add \u003cstrong\u003e3.3 cubic feet of volume for every square foot\u003c\/strong\u003e of uninsulated brick, tile or glass wall in the room. It does not say whether a glass door counts, so counting it is the cautious choice.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-ladder hhive15-out\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated room\u003c\/th\u003e\n\u003cth\u003eOutput\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"hhive15-kw\"\u003eHIVE 12\u003c\/td\u003e\n\u003ctd\u003e424 to 636 cu. ft. at 240 V, 318 to 495 at 208 V\u003c\/td\u003e\n\u003ctd\u003e12 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"hhive15-on\"\u003e\n\u003ctd class=\"hhive15-kw\"\u003eHIVE 15 \u003cspan class=\"hhive15-tag\"\u003eThis heater\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e530 to 813 cu. ft. at 240 V, 389 to 601 at 208 V\u003c\/td\u003e\n\u003ctd\u003e15 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"hhive15-kw\"\u003eHIVE 18\u003c\/td\u003e\n\u003ctd\u003e636 to 989 cu. ft. at 240 V, 477 to 742 at 208 V\u003c\/td\u003e\n\u003ctd\u003e18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n    \u003c\/table\u003e\u003c\/div\u003e\n    \u003ch3\u003eA worked example for the HIVE 15\u003c\/h3\u003e\n    \u003cp\u003eTake a room 12 feet by 9 feet with a 7 foot ceiling: 108 square feet of floor and 756 cubic feet, inside this heater's 530 to 813. Count a full glass door, take 13 square feet as an example and measure your own, and at 3.3 cubic feet a square foot the room behaves like about 799 cubic feet, which is still inside the HIVE 15's range.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-warn\"\u003e\u003cp\u003e\u003cb\u003eThe minimum sauna room height for a HIVE is 77 inches (1950 mm).\u003c\/b\u003e HUUM recommends 79 to 91 inches and asks for 44 to 51 inches between the top bench and the ceiling. For a taller room, HUUM advises lowering the ceiling to reduce the volume.\u003c\/p\u003e\u003c\/div\u003e\n    \u003cp\u003eNot sure which way a borderline room goes? Our \u003ca href=\"\/pages\/find-your-sauna-heater\"\u003esauna heater finder\u003c\/a\u003e walks the same arithmetic, the \u003ca href=\"\/pages\/sauna-heater-buyers-guide\"\u003esauna heater buyers guide\u003c\/a\u003e explains what the numbers mean, or call and we will do it with you.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"design\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eWhat makes it a HIVE\u003c\/p\u003e\n    \u003ch2\u003eWhy the HIVE 15 is round\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eHUUM modeled the HIVE on a wild beehive: stainless steel arcs hold the stone in an open round form, so the stone is what you see.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-block\"\u003e\n        \u003ch3\u003eAn open cage of stone\u003c\/h3\u003e\n\u003cp\u003eIt holds 528 lb (240 kg) inside stainless steel arcs. HUUM describes the large stone load as the source of the HIVE's gentle, long lasting steam.\u003c\/p\u003e\n\u003ch3\u003eThe air tunnel\u003c\/h3\u003e\n\u003cp\u003eEvery HIVE ships with an air tunnel inside the stone bed. HUUM's manual says it moves air through the heater to speed up heating, prevents the elements from overheating and gives them structural support.\u003c\/p\u003e\n\u003ch3\u003eFour legs, or sunk in\u003c\/h3\u003e\n\u003cp\u003eThe heater is 22.06 in diameter x 29.53 in H and stands on 4 adjustable legs. It can also be partly sunk into the bench or the floor with the \u003ca href=\"\/products\/huum-hive-embedding-flange\"\u003eHIVE embedding flange\u003c\/a\u003e, as long as at least 13.8 inches (350 mm) of it stays above the surface.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cfigure\u003e\u003cdiv class=\"hhive15-fig\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/0674\/1103\/files\/huum-hive-15-studio.jpg?v=1790069031\u0026amp;width=1200\" alt=\"HUUM HIVE floor standing electric sauna heater filled with stones\" width=\"1144\" height=\"1144\" loading=\"eager\"\u003e\u003c\/div\u003e\n\u003cfigcaption\u003eThe HUUM HIVE 15.\u003c\/figcaption\u003e\u003c\/figure\u003e\n    \u003ch3\u003eThe HIVE 15 is a panel question\u003c\/h3\u003e\n    \u003cp\u003eAt 240 volts it draws 62.5 amps across two circuits, and HUUM's manual calls for two 50 amp breakers with 6 AWG cable on each. Have an electrician look at the panel before you order.\u003c\/p\u003e\n\u003cp\u003eIt asks for 5.9 inches to the wall beside it and 33.84 inches wall to wall across it, and like every full size HIVE it holds 528 pounds of stone and needs the UKU extension box.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"hhive15-tinted\" id=\"parts\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eThe whole order\u003c\/p\u003e\n    \u003ch2\u003eWhat a working HIVE 15 takes, beyond the heater\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eA sauna heater is several purchases, and the others are easy to miss. Nothing here is padding: the heater will not run without them.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-spec\"\u003e\n      \u003ccaption\u003eRequired to operate\u003c\/caption\u003e\n      \u003ctr class=\"hhive15-hl\"\u003e\n\u003cth\u003eThe heater\u003c\/th\u003e\n\u003ctd\u003eThis page.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eA certified control\u003c\/th\u003e\n\u003ctd\u003eThe control unit goes outside the hot room. HUUM's matched control is the UKU, and it is the controller the heater was certified with: the \u003ca href=\"\/products\/huum-uku-local-sauna-heater-control\"\u003eHUUM UKU Local control\u003c\/a\u003e or the \u003ca href=\"\/products\/huum-uku-wifi-sauna-heater-control\"\u003eHUUM UKU Wi-Fi control\u003c\/a\u003e.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eThe UKU extension box\u003c\/th\u003e\n\u003ctd\u003eRequired at this output: the UKU main module carries heaters up to 11 kW. \u003ca href=\"\/products\/huum-uku-extension-box\"\u003eHUUM UKU extension box\u003c\/a\u003e.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003e16 boxes of stone\u003c\/th\u003e\n\u003ctd\u003e528 lb (240 kg), 2 to 4 inches (5 to 10 cm). \u003ca href=\"\/products\/huum-sauna-stones-5-10-cm\"\u003eHUUM olivine diabase sauna stones\u003c\/a\u003e come in 33 pound boxes.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\u003c\/div\u003e\n    \u003ch3\u003eA guard is a code item, not an upsell\u003c\/h3\u003e\n    \u003cp\u003eThe International Residential Code asks for sauna heaters to be protected from accidental contact by a guard made of a material with low thermal conductivity, such as wood, without blocking the heat. You can build one or use the \u003ca href=\"\/products\/huum-hive-safety-rail\"\u003eHUUM safety rail\u003c\/a\u003e made for this heater. HUUM adds that when the guard is a flammable material such as wood, the heater's minimum safety distances still have to be kept to it. Check what your local code has adopted.\u003c\/p\u003e\n    \u003ch3\u003eOptional\u003c\/h3\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/huum-hive-reflector\"\u003ereflector panel\u003c\/a\u003e is the part HUUM makes for a tight space: HUUM states it halves the heater's safety distance to the walls, and the heater manual's own distances still decide the layout until your inspector agrees. The \u003ca href=\"\/products\/huum-hive-embedding-flange\"\u003eembedding flange\u003c\/a\u003e is only needed if the heater is sunk into a bench or the floor.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-warn\"\u003e\u003cp\u003eBuying the heater, the control and the stone together settles the order in one go: our \u003ca href=\"\/products\/huum-hive-15-sauna-heater-package\"\u003eHUUM HIVE 15 sauna heater package\u003c\/a\u003e is exactly that, priced at the parts added together. Or call and we will price the heater, control and stone together.\u003c\/p\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"electrical\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eElectrical\u003c\/p\u003e\n    \u003ch2\u003eThe breaker and wire size the HUUM HIVE 15 needs\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eSettle this before you buy, because it is the line item that surprises people. The heater is hardwired on two supply circuits by a licensed electrician.\u003c\/p\u003e\n    \u003cp\u003eThe figures below are HUUM's, from its US manual. They are the manufacturer's minimum, not a design for your house: sauna heating is a continuous load, so the National Electrical Code can require a larger breaker and heavier conductors than the manual's figure, and local amendments differ. Your electrician sizes the circuit.\u003c\/p\u003e\n    \u003cp\u003eThis heater takes \u003cstrong\u003etwo supply circuits\u003c\/strong\u003e, each on its own breaker and cable, which is why the figures below come in pairs.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-ladder hhive15-rooms\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSupply\u003c\/th\u003e\n\u003cth\u003eWhat HUUM specifies\u003c\/th\u003e\n\u003cth\u003eRated room\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr class=\"hhive15-on\"\u003e\n\u003ctd class=\"hhive15-kw\"\u003e240 V\u003cspan class=\"hhive15-tag\"\u003eMost homes\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd\u003e15 kW, 62.5 A, 50 + 50 A (two circuits) breaker, 6 + 6 AWG minimum cable\u003c\/td\u003e\n\u003ctd\u003e530 to 813 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd class=\"hhive15-kw\"\u003e208 V\u003c\/td\u003e\n\u003ctd\u003e11.25 kW, 54.09 A, 40 + 40 A (two circuits) breaker, 8 + 8 AWG minimum cable\u003c\/td\u003e\n\u003ctd\u003e389 to 601 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\u003c\/div\u003e\n    \u003ch3\u003eWhat the manual requires\u003c\/h3\u003e\n    \u003cp\u003eThe supply cable has to meet UL 62 in the United States or CSA 49 in Canada. Crimping the cable ends is mandatory. Cable with non heat resistant PVC insulation is not allowed, and the junction box must be waterproof and within 20 inches (50 cm) of the floor. HUUM's HIVE manual says only certified control panels designed for the control of an electric heater may be used.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-warn\"\u003e\u003cp\u003e\u003cb\u003eHUUM recommends connecting the heater without a GFCI breaker.\u003c\/b\u003e Its manual says it is recommended to connect the unit to the mains without one. Whether you can follow that depends on where the sauna goes and which edition of the electrical code your area has adopted: an outdoor sauna at a home may fall inside the Code's ground fault requirement for outdoor outlets at these ratings, depending on the edition adopted and how your inspector reads it, while an indoor hardwired heater usually is not caught. Where the manual and the adopted code disagree, the code and your inspector decide.\u003c\/p\u003e\u003c\/div\u003e\n    \u003ch3\u003eWhy it is listed, and why that matters\u003c\/h3\u003e\n    \u003cp\u003eIt is listed by SGS, not by UL. SGS North America is on OSHA's list of nationally recognized testing laboratories, and it lists the HIVE 15 for the United States and Canada under certificate SGSNA\/20\/SUW\/00067X, to UL 60335-1, CAN\/CSA C22.2 No. 60335-1, CAN\/CSA E60335-2-53 and IEC 60335-2-53. The listing applies on the conditions SGS records against it: the heater is used with sauna stones, run from an approved sauna heater controller (the listing was evaluated with the UKU), supplied by conductors rated to at least 90 degrees C, and carries the warning tag on the bottom rung of the frame. Inspectors differ on what they ask to see for a sauna heater, so check with yours before you buy. We can send you the certificate.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"hhive15-tinted\" id=\"install\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eClearances\u003c\/p\u003e\n    \u003ch2\u003eWhere the HUUM HIVE 15 can go\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eClearances are set per model and generally grow with output. These are this model's figures from HUUM's manual.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-spec\"\u003e\n      \u003ccaption\u003eMinimum distances, HIVE 15\u003c\/caption\u003e\n      \u003ctr\u003e\n\u003cth\u003eTo the wall beside the heater\u003c\/th\u003e\n\u003ctd\u003e5.9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eWall to wall across the heater\u003c\/th\u003e\n\u003ctd\u003e33.84 in\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eAbove the heater, to the ceiling\u003c\/th\u003e\n\u003ctd\u003e47.25 in (1200 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eBody size\u003c\/th\u003e\n\u003ctd\u003e22.06 in diameter x 29.53 in H\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e50.7 lb without stone\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eFloor standing on four adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\u003c\/div\u003e\n    \u003cp\u003eScrew the 4 legs in and adjust them so all four carry the heater equally and it stands level, as HUUM's manual asks.\u003c\/p\u003e\n    \u003cp\u003eThe room itself has to be built for a sauna, with an insulated shell, a reflective vapor barrier and supply and exhaust vents. Our \u003ca href=\"\/collections\/traditional-saunas\"\u003etraditional sauna rooms\u003c\/a\u003e arrive built that way.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"stones\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eStone\u003c\/p\u003e\n    \u003ch2\u003eHow much stone the HIVE 15 takes, and how to lay it\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eThe stone is not a finishing touch. It is the thermal mass that turns 15 kW into steam, and the heater may not be switched on without it.\u003c\/p\u003e\n    \u003cp\u003eThis heater holds \u003cstrong\u003e528 lb (240 kg)\u003c\/strong\u003e, which is \u003cstrong\u003e16 boxes\u003c\/strong\u003e of HUUM stone. HUUM asks for stone 2 to 4 inches (5 to 10 cm) across and supplies olivine diabase in 33 pound boxes. The box count is from the manual's table of 33 pound boxes; the manual's text gives about 551 pounds (250 kg), so order the full 16. HUUM advises against decorative stone, which does not store enough heat and breaks easily.\u003c\/p\u003e\n    \u003ch3\u003eLaying it\u003c\/h3\u003e\n    \u003cp\u003eWash the stone under running water first. Lay it one piece at a time rather than pouring it in, bigger stones at the bottom and the sides, smaller ones fixing them in place. Lay stone between the elements too, which supports them and keeps them apart, without pushing hard enough to bend them. Lay the stones as tightly as possible while leaving some room for air to circulate, and lay the outer face tightly so no element shows through. HUUM recommends round stone, which lets the steam water run down to the lower layers.\u003c\/p\u003e\n\u003cdiv class=\"hhive15-warn\"\u003e\u003cp\u003e\u003cb\u003eA sparsely filled stone bed is a fire hazard.\u003c\/b\u003e HUUM's manual warns that if the elements are not properly surrounded by stone, its safety distances do not apply. Damage caused by unsuitable stone is not covered by HUUM's warranty.\u003c\/p\u003e\u003c\/div\u003e\n\u003ch3\u003eLooking after it\u003c\/h3\u003e\n\u003cp\u003eHUUM asks for the stone to be checked once a year, with broken pieces taken out and replaced. Stone crumbles as it cycles, and the pieces are what block the air holes.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"video\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eWatch\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-vidrow\"\u003e\n    \u003cdiv class=\"hhive15-vid\"\u003e\u003ciframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/cNupdGGmFlo\" title=\"Building it into the bench, HUUM\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n    \u003cdiv class=\"hhive15-vidbody\"\u003e\n    \u003ch2\u003eBuilding it into the bench\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eThe optional embedding flange, from bench cut-out to finished edge.\u003c\/p\u003e\n    \u003cp\u003eHUUM filmed this itself. Its heater installation films are made for Europe and show European wiring, so we do not run them here: the sauna side of the job is the same, the electrical side is not.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003c\/section\u003e\n\n\u003csection class=\"hhive15-tinted\" id=\"costs\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eRunning cost\u003c\/p\u003e\n    \u003ch2\u003eWhat the HIVE 15 costs to run\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eA sauna heater draws its full rated power while it heats, then cycles on the thermostat to hold temperature. That makes the ceiling easy to calculate and the real figure lower.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-spec\"\u003e\n      \u003ccaption\u003eAt the US average residential price of 18.3 cents a kilowatt hour (EIA, June 2026)\u003c\/caption\u003e\n      \u003ctr\u003e\n\u003cth\u003eFull output, one hour\u003c\/th\u003e\n\u003ctd\u003e15 kW x 0.183 = about 2.75 dollars\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eThree hours at full draw, heat up and a session\u003c\/th\u003e\n\u003ctd\u003eabout 8.23 dollars\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003cth\u003eThree of those a week\u003c\/th\u003e\n\u003ctd\u003eabout 25 dollars a week\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\u003c\/div\u003e\n    \u003cp\u003eThose are ceilings, not averages: once the room is at temperature the thermostat cycles the elements, so the real bill lands under these ceilings. Your own rate is on your utility bill and varies widely by state.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-warn\"\u003e\u003cp\u003e\u003cb\u003eInsulation controls this number, not the heater.\u003c\/b\u003e HUUM's manuals call for an insulated room so the heater can run at its regular output.\u003c\/p\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"crate\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eWhat you get\u003c\/p\u003e\n    \u003ch2\u003eIn the HIVE 15 carton\u003c\/h2\u003e\n    \u003cdiv class=\"hhive15-pairup\"\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"hhive15-chk\"\u003e\n\u003cli\u003eElectric heater\u003c\/li\u003e\n\u003cli\u003e4 adjustable legs\u003c\/li\u003e\n\u003cli\u003eAir tunnel\u003c\/li\u003e\n\u003cli\u003eInstallation and operation manual\u003c\/li\u003e\n\u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003ch3\u003eNot included\u003c\/h3\u003e\n        \u003cp\u003eThe control and the UKU extension box, the stone, and the electrical work. The control and 16 boxes of stone are required to operate the heater. The rail, reflector and embedding flange are optional.\u003c\/p\u003e\n        \u003ch3\u003eLead time\u003c\/h3\u003e\n        \u003cp\u003eDelivery estimates are shown on this page and at checkout. If you need a date before you commit, call us and we will confirm the current position with the distributor.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"hhive15-tinted\" id=\"specs\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eReference\u003c\/p\u003e\n    \u003ch2\u003eHUUM HIVE 15 specifications\u003c\/h2\u003e\n    \u003cdetails class=\"hhive15-more\" open\u003e\n      \u003csummary\u003eFull specification tables\u003c\/summary\u003e\n      \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-spec\"\u003e\n\u003ccaption\u003eFrom the HIVE user manual USA v13 (July 2025), Tables 1 to 3\u003c\/caption\u003e\n\u003ctr\u003e\n\u003cth\u003eHeater output\u003c\/th\u003e\n\u003ctd\u003e15 kW at 240 V, 11.25 kW at 208 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRoom volume\u003c\/th\u003e\n\u003ctd\u003e530 to 813 adjusted cu. ft. at 240 V, 389 to 601 cu. ft. at 208 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum room height\u003c\/th\u003e\n\u003ctd\u003e77 in (1950 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated current\u003c\/th\u003e\n\u003ctd\u003e62.5 A at 240 V, 54.09 A at 208 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCircuit breaker\u003c\/th\u003e\n\u003ctd\u003e50 + 50 A (two circuits) at 240 V, 40 + 40 A (two circuits) at 208 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum supply cable\u003c\/th\u003e\n\u003ctd\u003e6 + 6 AWG at 240 V, 8 + 8 AWG at 208 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStone capacity\u003c\/th\u003e\n\u003ctd\u003e528 lb (240 kg), 16 boxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStone size\u003c\/th\u003e\n\u003ctd\u003e2 to 4 in (5 to 10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBody size\u003c\/th\u003e\n\u003ctd\u003e22.06 in diameter x 29.53 in H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClearance to the wall beside it\u003c\/th\u003e\n\u003ctd\u003e5.9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall to wall across the heater\u003c\/th\u003e\n\u003ctd\u003e33.84 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClearance above the heater\u003c\/th\u003e\n\u003ctd\u003e47.25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eFloor standing on four adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eControl\u003c\/th\u003e\n\u003ctd\u003eSeparate certified control required, sold separately; UKU extension box required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n      \u003cdiv class=\"hhive15-tw\"\u003e\u003ctable class=\"hhive15-spec\"\u003e\n\u003ccaption\u003ePart number, certification and warranty\u003c\/caption\u003e\n\u003ctr\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eH1003022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeater weight, empty\u003c\/th\u003e\n\u003ctd\u003e50.7 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupply\u003c\/th\u003e\n\u003ctd\u003eSingle phase, 60 Hz, two circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eSGS Listed for North America (SGSNA\/20\/SUW\/00067X)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003eHUUM limited warranty, 3 years for private use and 1 year for commercial use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"compare\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eThe range\u003c\/p\u003e\n    \u003ch2\u003eHUUM HIVE 15 against the rest of the HIVE range\u003c\/h2\u003e\n    \u003cp class=\"hhive15-lead\"\u003eEvery figure below is HUUM's own, from its US manual, and the breaker column is the manufacturer's minimum rather than a design for your house.\u003c\/p\u003e\n    \u003cp\u003eScroll the table sideways to see every model.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-tw hhive15-tw--scroll\"\u003e\u003ctable class=\"hhive15-cmp\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"\/products\/huum-hive-12-electric-sauna-heater\"\u003e\u003cspan class=\"hhive15-cmp-h\"\u003eHUUM\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-m\"\u003eHIVE 12\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-here\"\u003e12 kW, 424 to 636 cu. ft.\u003c\/span\u003e\u003c\/a\u003e\u003c\/th\u003e\n\u003cth class=\"hhive15-me\"\u003e\n\u003cspan class=\"hhive15-cmp-h\"\u003eHUUM\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-m\"\u003eHIVE 15\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-here\"\u003eYou are here\u003c\/span\u003e\n\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"\/products\/huum-hive-18-electric-sauna-heater\"\u003e\u003cspan class=\"hhive15-cmp-h\"\u003eHUUM\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-m\"\u003eHIVE 18\u003c\/span\u003e\u003cspan class=\"hhive15-cmp-here\"\u003e18 kW, 636 to 989 cu. ft.\u003c\/span\u003e\u003c\/a\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput at 240 V\u003c\/td\u003e\n\u003ctd\u003e12 kW\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e15 kW\u003c\/td\u003e\n\u003ctd\u003e18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated room\u003c\/td\u003e\n\u003ctd\u003e424 to 636 cu. ft.\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e530 to 813 cu. ft.\u003c\/td\u003e\n\u003ctd\u003e636 to 989 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent\u003c\/td\u003e\n\u003ctd\u003e50 A\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e62.5 A\u003c\/td\u003e\n\u003ctd\u003e75 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaker\u003c\/td\u003e\n\u003ctd\u003e30 + 30 A (two circuits)\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e50 + 50 A (two circuits)\u003c\/td\u003e\n\u003ctd\u003e50 + 50 A (two circuits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum cable\u003c\/td\u003e\n\u003ctd\u003e10 + 10 AWG\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e6 + 6 AWG\u003c\/td\u003e\n\u003ctd\u003e6 + 6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTo the wall beside it\u003c\/td\u003e\n\u003ctd\u003e4.72 in\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e5.9 in\u003c\/td\u003e\n\u003ctd\u003e7.06 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone\u003c\/td\u003e\n\u003ctd\u003e16 boxes\u003c\/td\u003e\n\u003ctd class=\"hhive15-me\"\u003e16 boxes\u003c\/td\u003e\n\u003ctd\u003e16 boxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n    \u003ch3\u003eWhen a HIVE is the wrong heater\u003c\/h3\u003e\n    \u003cp\u003eFor a room under 424 cubic feet a full size HIVE is more heater than you need: the HIVE Mini covers 177 to 566 cubic feet on a single circuit, without the extension box.\u003c\/p\u003e\n    \u003cp\u003eCompare the whole range on our \u003ca href=\"\/collections\/electric-sauna-heaters\"\u003eelectric sauna heaters\u003c\/a\u003e page, browse every \u003ca href=\"\/collections\/sauna-heaters\"\u003esauna heater\u003c\/a\u003e we carry, or see every model in our \u003ca href=\"\/collections\/huum\"\u003eHUUM sauna heaters\u003c\/a\u003e collection.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\"\u003eBuyer questions\u003c\/p\u003e\n    \u003ch2\u003eHUUM HIVE 15 questions buyers ask before ordering\u003c\/h2\u003e\n    \u003cdiv class=\"hhive15-faq\"\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat size sauna will the HUUM HIVE 15 heat?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eHUUM rates it for 530 to 813 cubic feet on 240 volts, or 389 to 601 cubic feet on 208 volts. Measure length by width by height in feet, then add 3.3 cubic feet for every square foot of uninsulated glass, brick or tile wall, and size from that number.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the HUUM HIVE 15 come with a control?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eNo. Every HUUM electric heater needs a separate certified control, bought separately, and the control unit goes outside the hot room. HUUM's matched control is the UKU, the controller this heater was certified with, in Local or Wi-Fi form. At this output the UKU also needs the extension box.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow many boxes of stone does the HUUM HIVE 15 need?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003e16 boxes. The heater holds 528 lb (240 kg) and HUUM asks for stone 2 to 4 inches (5 to 10 cm) across. HUUM's own stone is olivine diabase in 33 pound boxes. The heater may not be run before it is properly filled.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat breaker and wire does the HUUM HIVE 15 need?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eOn 240 volts it draws 62.5 A and HUUM specifies two circuits, each on a 50 A breaker with 6 AWG cable. On 208 volts it is 54.09 A, two 40 A breakers with 8 AWG cable on each. The cable must meet UL 62 in the United States or CSA 49 in Canada, and your electrician sizes the install to the National Electrical Code and to local amendments.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs the HUUM HIVE 15 UL listed?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eIt is listed by SGS, not by UL. SGS North America is on OSHA's list of nationally recognized testing laboratories, and it lists the HIVE 15 for the United States and Canada under certificate SGSNA\/20\/SUW\/00067X, to UL 60335-1, CAN\/CSA C22.2 No. 60335-1, CAN\/CSA E60335-2-53 and IEC 60335-2-53. The listing applies on the conditions SGS records against it: the heater is used with sauna stones, run from an approved sauna heater controller (the listing was evaluated with the UKU), supplied by conductors rated to at least 90 degrees C, and carries the warning tag on the bottom rung of the frame. Inspectors differ on what they ask to see for a sauna heater, so check with yours before you buy. We can send you the certificate.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I install the HUUM HIVE 15 myself?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eNot if you want the warranty. HUUM's warranty requires the heater to be installed and connected by a licensed electrician, with proof presented to HUUM, and HUUM recommends a specialist lays the stone. The heater is hardwired, crimped cable ends are mandatory and the manual forbids cable with non heat resistant PVC insulation. Keep the electrician's invoice.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the HUUM HIVE 15 need a GFCI breaker?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eHUUM's manual says it is recommended to connect the heater without one. Whether you can follow that depends on where the sauna goes and which edition of the electrical code your area has adopted. An outdoor sauna at a home may fall inside the Code's ground fault requirement for outdoor outlets at these ratings, depending on the edition adopted and how your inspector reads it, while an indoor hardwired heater usually is not caught. Where the manual and the adopted code disagree, the code and your inspector decide.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan the HUUM HIVE 15 be set into the bench?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eYes. HUUM's manual allows the HIVE to be partly sunk into the sauna bench or floor, as long as at least 13.8 inches (350 mm) of it stays above the surface, with the HIVE embedding flange covering the cut edge.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the HUUM HIVE 15 need a UKU extension box?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eYes. The UKU's main module carries heaters up to 11 kW, so at this output the UKU extension box is required, mounted outside the steam room near the main module.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat warranty comes with the HUUM HIVE 15?\u003c\/summary\u003e\u003cdiv class=\"hhive15-fb\"\u003e\u003cp\u003eHUUM warrants its electric heaters, wood stoves and controls for 3 years in a private sauna and 1 year in a commercial one, from the date of purchase, with spare parts covered for 1 year. Heating elements, controller sensors, stones, HUUM accessories, and wood stove door glass and ash grates are excluded, and so is damage from unsuitable stones or from a heater sized wrong for the room. HUUM counts it as commercial use if a registered business uses the product commercially, if a private user uses it commercially, or if a private user runs it for more than 1,500 hours in a 12 month period. For the warranty to apply, the heater has to be installed and connected by a licensed electrician with proof presented to HUUM, installed and operated to HUUM's manual and to local building, electrical and fire codes, and installed complete. Damage found on delivery has to be reported to us within 48 hours of delivery, with photographs and before the heater is installed; that is our window, and because it is shorter than HUUM's 7 days, it is the one that applies to the HUUM warranty. Any defect has to be reported within 30 days of discovering it. Because elements are excluded, we stock them as \u003ca href=\"\/products\/huum-hive-heating-element\"\u003ereplacement parts\u003c\/a\u003e.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cdiv class=\"hhive15-c\"\u003e\n\u003cdiv class=\"hhive15-close\" id=\"order\"\u003e\n  \u003cdiv class=\"hhive15-c\"\u003e\n    \u003cp class=\"hhive15-eyebrow\" style=\"color:#E8A33D\"\u003eOne last thing\u003c\/p\u003e\n    \u003ch2\u003eGet the heater, the control and the stone right\u003c\/h2\u003e\n    \u003cp\u003eTell us the room dimensions and how the walls are built and we will walk you through the manual's own figures for output, circuit, clearances and stone before you order, and your electrician confirms the circuit. If the room is borderline we will say so rather than sell you the bigger heater.\u003c\/p\u003e\n    \u003cdiv class=\"hhive15-who\"\u003e\n      \u003cimg class=\"hhive15-av\" src=\"https:\/\/recoveryroomdirect.com\/cdn\/shop\/files\/recovery_room_direct_specialist_customer_service.png?v=178611576\u0026amp;width=128\" alt=\"Sauna specialist at Recovery Room Direct\" width=\"52\" height=\"52\"\u003e\n      \u003cp\u003e\u003cb\u003eRecovery Room Direct\u003c\/b\u003e\u003cspan\u003eSauna specialists\u003c\/span\u003e\u003cspan\u003eMonday to Saturday, 9AM to 6PM ET\u003c\/span\u003e\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003ca class=\"hhive15-btn\" href=\"tel:+18885005675\"\u003eCall (888) 500-5675\u003c\/a\u003e\n    \u003ca class=\"hhive15-up\" href=\"#MainContent\"\u003eReady to order? Scroll up to the buy box\u003c\/a\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":53514414293359,"sku":"H1003022","price":3088.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/0674\/1103\/files\/huum-hive-15-studio.jpg?v=1790069031","url":"https:\/\/recoveryroomdirect.com\/products\/huum-hive-15-electric-sauna-heater","provider":"Recovery Room Direct","version":"1.0","type":"link"}