HUUM STEEL 11 11kW Electric Sauna Heater
HUUM STEEL 11 11kW Electric Sauna Heater
- Regular price
- $2,391.00
- Regular price
- Sale price
- $2,391.00
- Unit price
- per
Found it lower? We'll match it, before or after you buy.
Send us a link to the lower price. If it is the same model, new and in stock at an authorized U.S. online retailer, we match it. Already ordered? If it was lower on your order date, claim the difference within 30 days.
Excludes sale pricing, marketplace sellers and later price drops.
Read the full price match terms →A stainless column that fits 20.5 inches wall to wall, for rooms between 354 and 566 cubic feet.
- Takes 10 stone boxes, 33 lbs each
- 12.6″ square footprint, 38.4″ tall
- 240V hardwired, licensed electrician required
Width × height of each glass or tile surface, added together. A 2 × 6.5 ft glass door is 13 sq ft.
Measure the inside of the room, in feet. For a barrel sauna or a sauna kit, go with the heater size the sauna’s manufacturer recommends.
Room volume is length x width x height in feet.
Couldn't load pickup availability
How does delivery work?
How does delivery work?
Ships from Wheeling, Illinois. Free to the contiguous 48 above our free shipping threshold. A small accessory can fall below it and then a flat charge applies, shown at checkout before you pay.
How it arrives. The DROP comes by ground parcel, with no appointment and nobody home. CLIFF, STEEL, HIVE and CORE come palletized by freight, including the wall mounted Mini models: the carrier calls to book a window, someone has to sign, and it is a curbside drop rather than inside.
Stone ships in its own boxes. A heater takes 3 to 16 boxes at 33 pounds each. Stone added from a HUUM heater's own page ships free with that heater; ordered on its own it is charged per box at checkout. The quantity is set by the heater, not the room.
When it ships. The estimate on each product page is the distributor's usual dispatch time for stocked items. Stock moves, so we confirm the current position when you order. Working to a deadline? Ask us first.
If it arrives damaged. Note it on the delivery paperwork, photograph the carton and the contents, and tell us the same day. Report damage 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 too. Refuse a carton or pallet that is punctured, crushed or structurally damaged.
Where we ship. The contiguous 48 states. We do not ship HUUM to Alaska, Hawaii or Puerto Rico.
Not included: the electrical work. A HUUM heater is hardwired by a licensed electrician, and the clearances and cable entry are set by the model, so book the electrician for after the heater arrives.
What does the warranty cover?
What does the warranty cover?
Private use. 3 years on electric heaters, wood stoves and controls, and 1 year on spare parts, running from your purchase date. Keep the receipt and your electrician's invoice.
Commercial use. 1 year on all of them. HUUM treats it as commercial if a business uses the product commercially, if a private owner uses it commercially, or if a private owner runs it more than 1,500 hours in any 12 months, so a gym, studio or rental is commercial from day one.
What is covered. Defects in materials and workmanship. HUUM decides whether to repair, replace, refund or, with your agreement, reduce the price, and it arranges and pays for any transport it needs. A replaced part does not restart the clock.
Excluded, the ones that matter most. Heating elements, all sensors, sauna stones, accessories, and a wood stove's door glass and ash grate. Also normal wear, damage from poor ventilation or constant damp, power surges and overheating, non-HUUM parts fitted without written approval, and a heater that was the wrong size for the room. Until it is installed it must be kept indoors, dry, ventilated and above freezing.
Two conditions decide most claims. The heater must be installed and connected by a licensed electrician, to HUUM's manual and your local codes, and HUUM can ask for proof. Damage found on delivery must be reported to us within 48 hours and claimed with photographs before the product is installed. Any other fault: report it within 30 days of finding it.
If the fault turns out not to be covered. HUUM's terms let it charge for the work of diagnosing it. We will tell you as soon as HUUM tells us.
Who handles it. HUUM OU in Estonia is the warrantor and we file the claim for you, so you deal with us rather than with Estonia. Call (888) 500-5675 with your order number, the model and its serial number and photographs.
What if I need to return it?
What if I need to return it?
30 days from purchase. New, uninstalled and resalable, in the original packaging with all parts. A heater that has been wired in, fired or loaded with stones counts as installed and cannot go back, and so does a control that has been wired in.
What it costs. Full credit for the product, less a repackaging fee of 20 to 50 dollars depending on the item. There is no percentage restocking fee on a standard return.
Who pays the freight. You do on a change of mind. We cover it when the cause is shipping damage or our error. Shipping you paid at checkout is not refunded on a change of mind return.
Damaged on arrival. A different and faster process. Note it on the delivery receipt before signing, photograph the carton and contents, and call us the same day. Report it within 48 hours of delivery, with photographs and before the product is installed.
Stones and spare parts. Stone is sold by weight and is not returnable once a box is opened. Heating elements, sensors and other spare parts cannot be returned once fitted.
Cancelling before it ships. No fee at all before we send the order to the distributor. After that an administrative fee of up to 5 percent may apply, and we waive it when we are not charged ourselves.
To start a return. Call (888) 500-5675. A Return Authorization number is required before anything ships back. Refunds go to the original payment method within 7 business days of the return being received and inspected.
PRODUCT DESCRIPTION
Jump to7 sections
The largest STEEL
The HUUM STEEL 11 is a 11 kW floor standing electric sauna heater for rooms of 354 to 566 cubic feet
Eleven kilowatts for rooms of 354 to 566 cubic feet, with the same 3.94 inch side clearance as the STEEL 9.
The room
354 to 566 cu. ft.
Length 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.
Rated current
43.75 A at 240 V
HUUM's manual calls for a 50 A breaker and 8 AWG cable. Worth confirming your panel can carry it. It is hardwired by a licensed electrician, who sizes the circuit to the National Electrical Code. On this model HUUM's breaker figure is below what the Code's continuous-load rule gives for its rated current, so your electrician and inspector decide the breaker and cable, and they may be larger than HUUM's figure.
The rest of the order
Control and 10 boxes of stone
Neither is in the carton. A HUUM UKU control runs the heater from outside the room, and this heater holds about 330 lb (150 kg) of sauna stone.
Sizing
Will the HUUM STEEL 11 heat your sauna?
Sauna 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.
HUUM rates the STEEL 11 for 354 to 566 cubic feet on a 240 volt supply, and its manual warns that the warranty does not apply if the heater and room are dimensioned incorrectly.
Cold surfaces change the answer. HUUM's manual says to add 3.3 cubic feet of volume for every square foot 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.
| Model | Rated room | Output |
|---|---|---|
| STEEL Mini 4 | 106 to 177 cu. ft. at 240 V, 106 to 159 at 208 V | 4 kW |
| STEEL 6 | 177 to 318 cu. ft. at 240 V, 142 to 248 at 208 V | 6 kW |
| STEEL 9 | 283 to 460 cu. ft. at 240 V, 212 to 354 at 208 V | 9 kW |
| STEEL 11 This heater | 354 to 566 cu. ft. at 240 V, 265 to 424 at 208 V | 11 kW |
A worked example for the STEEL 11
Take a room 9 feet by 8 feet with a 7.5 foot ceiling: 72 square feet of floor and 540 cubic feet, inside this heater's 354 to 566. 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 583 cubic feet, which is past the top of the STEEL 11's range.
HUUM's STEEL manual gives a minimum sauna room height of 86.6 inches (2200 mm), with a regular height of 86.6 to 91 inches, and advises bringing a taller ceiling down into that range to reduce the volume.
Not sure which way a borderline room goes? Our sauna heater finder walks the same arithmetic, the sauna heater buyers guide explains what the numbers mean, or call and we will do it with you.
What makes it a STEEL
What the STEEL 11 is built around
The STEEL wraps its stone in a stainless steel enclosure. HUUM describes it as a sleek design with small safety distances, and the manual's figures bear that out.
A lot of stone for the size
It holds about 330 lb (150 kg). HUUM describes the STEEL as holding a large amount of stone for gentle and long lasting steam.
On the floor
The heater is 12.6 in W x 12.6 in D x 38.4 in H. The 6, 9 and 11 stand on the floor on the adjustable legs in the carton and are anchored to the floor with brackets, fixed with a suitable screw, preferably at least 6 x 40 mm, according to HUUM's manual.
It can be sunk into the bench
HUUM says the STEEL can be embedded into the sauna bench, with at least 21.7 inches (550 mm) of the heater above the bench surface. The CLIFF and STEEL embedding flange covers the cut edge.
The STEEL 11 against the CLIFF 11
Both give 11 kW for the same room range on the same circuit. The difference is the space around them and the stone in them. HUUM's manual asks for 3.94 inches to the side wall here and 20.5 inches wall to wall, against 15 and 40.5 inches for the CLIFF 11, and the STEEL holds about 330 pounds of stone to the CLIFF's 165.
Above 566 cubic feet the STEEL range stops, and a HIVE is the next step. On 208 volts this heater makes 8.5 kW for 265 to 424 cubic feet.
The whole order
What a working STEEL 11 takes, beyond the heater
A sauna heater is several purchases, and the others are easy to miss. Nothing here is padding: the heater will not run without them.
| The heater | This page. |
|---|---|
| A certified control | The 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 HUUM UKU Local control or the HUUM UKU Wi-Fi control. |
| 10 boxes of stone | About 330 lb (150 kg), 1.2 to 1.9 inches (3 to 5 cm). HUUM olivine diabase sauna stones come in 33 pound boxes. |
A guard is a code item, not an upsell
The 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 STEEL safety rail HUUM makes 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.
Optional
The reflector panel 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 embedding flange is only needed if the heater is sunk into a bench.
Buying the heater, the control and the stone together settles the order in one go: our HUUM STEEL 11 sauna heater package is exactly that, priced at the parts added together. Or call and we will price the heater, control and stone together.
Electrical
The breaker and wire size the HUUM STEEL 11 needs
Settle this before you buy, because it is the line item that surprises people. The heater is hardwired by a licensed electrician.
The 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. On this model HUUM's breaker figure is below what the Code's continuous-load rule gives for its rated current, so your electrician and inspector decide the breaker and cable, and they may be larger than HUUM's figure.
| Supply | What HUUM specifies | Rated room |
|---|---|---|
| 240 VMost homes | 11 kW, 43.75 A, 50 A breaker, 8 AWG minimum cable | 354 to 566 cu. ft. |
| 208 V | 8.5 kW, 37.98 A, 50 A breaker, 8 AWG minimum cable | 265 to 424 cu. ft. |
What the manual requires
The supply cable has to meet UL 62 in the United States or CSA 49 in Canada, and a means of disconnecting all poles, a circuit breaker, goes on the power circuit before the control. 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 STEEL manual says any certified control panel may be used, and that the heater may be used only with a control unit that has a timer function.
HUUM recommends connecting the heater without a GFCI breaker. 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.
Why it is listed, and why that matters
It is listed by SGS, not by UL. SGS North America is on OSHA's list of nationally recognized testing laboratories, and it lists the STEEL 11 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. SGS also requires CLIFF and STEEL models to be anchored in place. 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.
Clearances
Where the HUUM STEEL 11 can go
Clearances are set per model and generally grow with output. These are this model's figures from HUUM's manual.
| To the wall beside the heater | 3.94 in |
|---|---|
| Wall to wall across the heater | 20.5 in |
| Above the heater, to the ceiling | 47.3 in (1200 mm) |
| Body size | 12.6 in W x 12.6 in D x 38.4 in H |
| Weight | 33.0 lb without stone |
| Mounting | Floor standing, anchored with the supplied brackets |
HUUM's manual has the 6, 9 and 11 anchored to the floor with brackets on the heater legs, fixed with a suitable screw, preferably at least 6 x 40 mm. SGS lists the CLIFF and STEEL on the condition that they are anchored.
The room itself has to be built for a sauna, with an insulated shell, a reflective vapor barrier and supply and exhaust vents. Our traditional sauna rooms arrive built that way.
Stone
How much stone the STEEL 11 takes, and how to lay it
The stone is not a finishing touch. It is the thermal mass that turns 11 kW into steam, and the heater may not be switched on without it.
This heater holds about 330 lb (150 kg), which is 10 boxes of HUUM stone. HUUM asks for stone 1.2 to 1.9 inches (3 to 5 cm) across and supplies olivine diabase in 33 pound boxes.
Laying it
Wash the stone first. Stack it loosely between the elements: HUUM's manual warns that stone packed too close makes the elements overheat, which shortens their life and slows the heating. The stone on the outer face goes close together, so no element is visible. HUUM recommends having a specialist lay the stone, and allows ceramic stones only at the user's own responsibility.
HUUM's manual requires the stone to hide the elements completely, and warns that a sparsely filled stone container is a fire hazard.
Watch
Building it into the bench
The optional embedding flange, from bench cut-out to finished edge.
HUUM 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.
Running cost
What the STEEL 11 costs to run
A 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.
| Full output, one hour | 11 kW x 0.183 = about 2.01 dollars |
|---|---|
| Three hours at full draw, heat up and a session | about 6.04 dollars |
| Three of those a week | about 18 dollars a week |
Those 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.
Insulation controls this number, not the heater. HUUM's manuals call for an insulated room so the heater can run at its regular output.
What you get
In the STEEL 11 carton
- Electric heater
- 4 adjustable legs
- Installation and operation manual
Not included
The control, the stone, and the electrical work. The control and 10 boxes of stone are required to operate the heater. The rail, reflector and embedding flange are optional.
Lead time
Delivery 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.
Reference
HUUM STEEL 11 specifications
Full specification tables
| Heater output | 11 kW at 240 V, 8.5 kW at 208 V |
|---|---|
| Room volume | 354 to 566 adjusted cu. ft. at 240 V, 265 to 424 cu. ft. at 208 V |
| Minimum room height | 86.6 in (2200 mm) |
| Rated current | 43.75 A at 240 V, 37.98 A at 208 V |
| Circuit breaker | 50 A at 240 V, 50 A at 208 V |
| Minimum supply cable | 8 AWG at 240 V, 8 AWG at 208 V |
| Stone capacity | About 330 lb (150 kg), 10 boxes |
| Stone size | 1.2 to 1.9 in (3 to 5 cm) |
| Body size | 12.6 in W x 12.6 in D x 38.4 in H |
| Clearance to the wall beside it | 3.94 in |
| Wall to wall across the heater | 20.5 in |
| Clearance above the heater | 47.3 in |
| Mounting | Floor standing, anchored with the supplied brackets |
| Control | Separate certified control required, sold separately |
| Part number | H1006032 |
|---|---|
| Heater weight, empty | 33.0 lb |
| Supply | Single phase, 60 Hz |
| Certification | SGS Listed for North America (SGSNA/20/SUW/00067X) |
| Warranty | HUUM limited warranty, 3 years for private use and 1 year for commercial use |
The range
HUUM STEEL 11 against the rest of the STEEL range
Every 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.
Scroll the table sideways to see every model.
| HUUMSTEEL Mini 44 kW, 106 to 177 cu. ft. | HUUMSTEEL 66 kW, 177 to 318 cu. ft. | HUUMSTEEL 99 kW, 283 to 460 cu. ft. | HUUMSTEEL 11You are here | |
|---|---|---|---|---|
| Output at 240 V | 4 kW | 6 kW | 9 kW | 11 kW |
| Rated room | 106 to 177 cu. ft. | 177 to 318 cu. ft. | 283 to 460 cu. ft. | 354 to 566 cu. ft. |
| Current | 14.58 A | 25 A | 37.5 A | 43.75 A |
| Breaker | 20 A | 30 A | 50 A | 50 A |
| Minimum cable | 12 AWG | 10 AWG | 8 AWG | 8 AWG |
| To the wall beside it | 2.0 in | 2.0 in | 3.94 in | 3.94 in |
| Stone | 4 boxes | 10 boxes | 10 boxes | 10 boxes |
When a STEEL is the wrong heater
The STEEL tops out at 11 kW and 566 cubic feet. If you want the stone on show, the CLIFF carries the same outputs in a slimmer 10.6 inch column. For a bigger room, a HIVE goes to 18 kW.
Compare the whole range on our electric sauna heaters page, browse every sauna heater we carry, or see every model in our HUUM sauna heaters collection.
Buyer questions
HUUM STEEL 11 questions buyers ask before ordering
What size sauna will the HUUM STEEL 11 heat?
HUUM rates it for 354 to 566 cubic feet on 240 volts, or 265 to 424 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.
Does the HUUM STEEL 11 come with a control?
No. 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.
How many boxes of stone does the HUUM STEEL 11 need?
10 boxes. The heater holds about 330 lb (150 kg) and HUUM asks for stone 1.2 to 1.9 inches (3 to 5 cm) across. HUUM's own stone is olivine diabase in 33 pound boxes. The heater may not be run before it is properly filled.
What breaker and wire does the HUUM STEEL 11 need?
On 240 volts it draws 43.75 A and HUUM specifies a 50 A breaker with 8 AWG cable. On 208 volts it is 37.98 A, a 50 A breaker and 8 AWG. 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. On this model HUUM's breaker figure is below what the Code's continuous-load rule gives for its rated current, so your electrician and inspector decide the breaker and cable, and they may be larger than HUUM's figure.
Is the HUUM STEEL 11 UL listed?
It is listed by SGS, not by UL. SGS North America is on OSHA's list of nationally recognized testing laboratories, and it lists the STEEL 11 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. SGS also requires CLIFF and STEEL models to be anchored in place. 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.
Can I install the HUUM STEEL 11 myself?
Not 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 and the manual forbids cable with non heat resistant PVC insulation. Keep the electrician's invoice.
Does the HUUM STEEL 11 need a GFCI breaker?
HUUM'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.
Can the HUUM STEEL 11 be set into the bench?
Yes. HUUM says the STEEL can be embedded into the sauna bench, with at least 21.7 inches (550 mm) of the heater above the bench surface, and the CLIFF and STEEL embedding flange covers the cut edge.
Does the HUUM STEEL 11 need a UKU extension box?
No. The extension box is for HUUM heaters above 11 kW, which means the HIVE 12, 15 and 18. This heater runs from the UKU's main module on its own.
What warranty comes with the HUUM STEEL 11?
HUUM 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 replacement parts.
One last thing
Get the heater, the control and the stone right
Tell 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.
Recovery Room DirectSauna specialistsMonday to Saturday, 9AM to 6PM ET
