SunRay Seneca 3-Person Outdoor Traditional Sauna | Red Cedar
SunRay Seneca 3-Person Outdoor Traditional Sauna | Red Cedar
- Regular price
- $4,890.00
- Regular price
- $7,335.00
- Sale price
- $4,890.00
- 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 →- Cedar cabin with a 6 kW Harvia heater
- Metal roof 11 in lower than the pitched cabins
- A sealed dome light and an exterior lamp
Curbside delivery, insured in transit
Couldn't load pickup availability
4.9 from 1,000+ owner reviews
Watch owner videos
Talk to a Recovery Specialist
1-888-500-5675
How does delivery work?
How does delivery work?
Free shipping to the contiguous 48. On every SunRay sauna, by freight from Richmond, Virginia. The estimate on each product page is in business days.
Freight to the curb. A kit of panels or barrel staves, in cartons on a pallet. The freight company calls to book a window, someone signs, and residential deliveries come on a lift gate truck. Plan for two or more people.
Hard to reach addresses. If a truck cannot reach you, a smaller vehicle may cost extra, and we tell you before the delivery is booked.
When it ships. In-stock saunas usually leave SunRay's warehouse within 1 to 2 business days of SunRay receiving the order, and you get a tracking email when it leaves.
If it arrives damaged. Note it on the delivery receipt before signing and photograph it. Refuse a punctured or crushed pallet and call us while the driver is there; for minor damage, call before the driver leaves. Report anything found after unpacking within 48 hours.
Where we ship. The contiguous 48 states. We do not ship SunRay to Alaska, Hawaii or Puerto Rico.
Not included: the electrical work and the assembly. A licensed electrician hardwires the Harvia heater on a traditional sauna to 240 V. Professional setup and assembly is available on the indoor saunas, and by quote on the others.
What does the warranty cover?
What does the warranty cover?
Structure: 10 years. The wooden panels, floor, ceiling and glass, from the original date of purchase, for the parts needed to repair a defect. If a structural defect cannot be fixed with a part, SunRay may send a replacement sauna; assembling it is then your cost.
Parts and electronics: 1 year. Every other part, including the heater and the electrical components. Parts replacement only: labor for fitting a part is not covered.
Not covered. Alteration, neglect, misuse, freight damage caused by the carrier, accidents and acts of God. Surface cracks and minor blemishes in the wood are natural, not defects. Report delivery damage within 48 hours, before assembly.
Two conditions decide most claims. Residential use only, because a commercial setting voids the warranty. And installed, run and maintained to the instructions: indoor saunas stay indoors, and an outdoor sauna without a weather cover needs its exterior resealed every year.
Who is covered. The original customer at the original delivery address. The warranty cannot be transferred.
Ask before a repair. Get SunRay's written consent before any repair you expect to be reimbursed. SunRay decides the cause of a fault and whether to repair or replace.
Who handles it. We are a factory-authorized SunRay dealer and file the claim for you. Call us with your order number, the model and photographs.
What if I need to return it?
What if I need to return it?
20 days from the ship date. New, unassembled and resalable; the ship date is in your tracking email. We handle the return, so you do not contact SunRay.
Unassembled means returnable. In its original packaging and crate with the manuals and accessories. A sauna that has been assembled, wired in or heated cannot go back.
What a return costs. A restocking fee of 20% of the purchase price may apply on a change-of-mind return. There is none on a documented freight damage claim.
Who pays the return freight. You do on a change of mind. We cover it when the cause is shipping damage or our error.
Original shipping. We never deduct the original shipping from your refund.
Damaged on arrival. A different and faster process. Note it before signing and photograph it. Refuse a punctured or crushed pallet and call us while the driver is there. Report anything found after unpacking within 48 hours.
Cancelling before it ships. No fee before we place the order with SunRay. After that an administrative fee of up to 5% may apply, and we waive it whenever we are not charged. If we miss our own ship date, you cancel with no fee.
To start a return. Call us for a Return Authorization number 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 to 15 sections
The short answer
The SunRay Seneca is a 3 person outdoor traditional sauna in western red cedar
The Seneca (SunRay model 300D5) is a contemporary outdoor cabin: a western red cedar cabin with a black-framed glass door, a metal roof that overhangs the front, and a 6 kW Harvia electric heater with stones. A deep bench with a backrest seats three adults, or gives one person room to stretch out, according to SunRay.
Choose it if you want the clean, modern lines of a flat-topped cabin instead of a pitched roof, a cedar cabin, and a heater with more output than the 4.5 kW pitched roof models. The four seat version of the same design is the Denali.
The wood
Western red cedar
A cedar cabin under a modern metal roof, 11 inches lower than SunRay's pitched roof models.
The seat
Three up, or one stretched out
A deep bench with an ergonomic backrest in a room 57 by 47 inches.
The heat
Harvia stones and steam
A 6 kW Harvia electric heater. SunRay recommends 125 to 170 F.
Watch
Watch the SunRay Seneca 300D5 outdoor cedar sauna
A one minute phone film from SunRay, shot indoors. It circles the finished cabin with the exterior lamp and the roof edge lights switched on, then opens the black-framed glass door.
Inside, the camera finds the Harvia heater with its name plate in a wooden cradle, the bench with a bucket and ladle, the slatted wall light, the sand timer and hygrometer, and the narrow side window seen from within. The cabin in the film matches the current Seneca photographs.
Size and seating
SunRay Seneca dimensions: a 3 person outdoor sauna for a deck or patio
Plan the site to the roof. The cabin stands inside it, and the room inside is 57 by 47 inches.
| Roof footprint | 78 W x 71 D in |
|---|---|
| Cabin | 61 W x 51 D x 85 H in |
| With the roof | 89 in tall |
| Interior | 57 W x 47 D x 75 H in |
|---|---|
| Seating | Deep bench with a backrest |
| Capacity | 3 adults, or 1 stretched out |
Footprint first, then height
The cabin stands on a 61 by 51 inch base. The metal roof extends it to 78 by 71 inches, so the overhang is the thing to measure against a wall, a fence or a neighboring structure. At 89 inches overall it sits well below the 100 inch pitched roof models, which helps under a pergola beam or a low tree canopy.
Room inside
Inside, the room is 57 inches wide, 47 deep and 75 high. That is the same floor as the Freeport and Waverly with two more inches of headroom. SunRay describes the seating as room for three adults, or for one person to stretch out.
The heater
The 6 kW Harvia heater in the SunRay Seneca, and how hot it runs
A 6 kW Harvia electric heater with stones sits in a wooden cradle beside the bench, the arrangement shown in SunRay's film.
For dry sauna, leave the stones alone. For steam, ladle water from the wooden bucket over them; bucket and ladle ship with the cabin. SunRay's D5 manual recommends setting the temperature at 125 to 170 F, and 170 F is SunRay's stated maximum. The same page allows about 45 to 60 minutes of warm-up before a session, and when the room reaches the setting the heater cycles on and off to hold it.
The manual recommends sessions of no more than 30 minutes, and points to the roof ventilation and the door for adjusting the heat while you sit. The Harvia heater manual in the shipment covers the controls.
Construction
SunRay Seneca construction: western red cedar, glass door and metal roof
A contemporary cedar box with an overhanging metal roof, lights inside and out, and a sealed exterior.
| Wood | Western red cedar |
|---|---|
| Roof | Metal, over a flat interior ceiling |
| Door | Glass, black-framed |
| Lighting | Interior dome light with automatic shut-off; exterior light; downlights under the roof overhang, shown in SunRay's photos |
| Exterior | Sealed; reseal yearly |
| Included | Sand timer, hygrometer, bucket and ladle |
Western red cedar
SunRay specifies western red cedar for the Seneca and the four seat Denali; its pitched roof cabins and the Cayman are hemlock.
The roof and the outside
SunRay's D5 manual builds the Seneca with an interior flat ceiling resting on its roof supports and a metal roof screwed on above it. SunRay lists a sealed exterior, and the manual's cover page asks for the exterior to be sealed again every year. SunRay's warranty makes that yearly reseal a condition for an outdoor sauna without a weather cover.
Compare it with other backyard cabins in our outdoor saunas collection.
Before you order
Preparing for the SunRay Seneca: foundation, sealant and a 240 V circuit
The D5 manual is specific about the base and asks for sealant during assembly. Line these up first.
- A sturdy, level surfaceThe manual names a concrete pad, a wood deck or another solid surface, and says never directly on the ground
- Moisture under the floorWhere the floor area is damp, lay a floor separator or moisture barrier first
- Overhang clearance78 by 71 inches for the roof and 89 inches of height
- Sealant and a caulking gunAssembly calls for exterior sealant along the wall bases, the door opening and the outside corners
- A dedicated 240 V circuitHard-wired to the heater by a licensed electrician
- Two to four adultsThe crew size the D5 manual asks for
- Permit and setbackAsk your building department, and your HOA if you have one, whether a detached sauna needs a permit and how far it must sit from the lot line
The electrical requirement
The Seneca's heater is rated 6 kW and needs 240 V, on a dedicated circuit, hard-wired by a licensed electrician. The D5 manual tells you to read the heater manual for the required voltage and amperage, so your electrician sizes the circuit from it and from the National Electrical Code.
Running cost
SunRay Seneca outdoor sauna running cost at 6 kW
Every input on show: 6 kW at full power and 18.34 cents per kilowatt hour (EIA Electric Power Monthly, June 2026).
Full power, 60 minutes
$1.10
6 kWh at 18.34 cents.
Warm-up plus a session
$1.65
An hour heating, 30 minutes inside: 9 kWh.
Three a week for a year
$257
156 sessions at that ceiling.
A traditional heater cycles once the room is at temperature, so the full-power figure is the ceiling and the bill comes in under it. To redo it at your rate, multiply 6 kW by the hours and by your price per kilowatt hour.
What you get
What ships with the SunRay Seneca outdoor sauna
A complete cedar cabin with its heater and stones. You supply the base, the circuit and the sealant tools.
Required before it runs
- Dedicated 240 V circuitRun and connected by a licensed electrician
- A solid, level basePad, deck or other solid surface
- Exterior sealant and a caulking gunFor the assembly steps in the D5 manual
Optional
- Professional Setup & AssemblyThird party crews, quoted for your address: professional outdoor sauna assembly
| Cabin | Floor, back, side and front walls, glass door, interior flat ceiling |
|---|---|
| Roof | Metal outer roof with screws |
| Heater | 6 kW Harvia with stones, wooden cradle |
| Seating | Bench and backrest |
| Lights | Sealed interior dome light, exterior light |
| Accessories | Sand timer, hygrometer, bucket and ladle |
| Manuals | D5 series assembly manual, heater manual |
Assembly
How the SunRay Seneca outdoor sauna is assembled
SunRay's D5 manual asks for two to four adults.
The floor goes onto the solid, level surface first. Before the back and side walls stand on it, a bead of sealant runs along their bottom edges; the walls then lock together with buckles already fitted to the panels, and the front wall joins on its inner buckles. The door handle fits through the glass door. Inside, the flat ceiling rests on its supports, the light wires connect, the sealed dome light goes in an upper corner and the bench and backrest are screwed in place.
The metal roof is fixed around the perimeter with its roof screws, the outside light goes on, and sealant is applied to the bottom of the door opening and the outside corners. Last, the accessories go up and the heater is set into its cradle, ready for the electrician.
Delivery day
SunRay Seneca delivery: freight to the curb, free in the lower 48
It travels by freight on a lift gate truck, free to the curb in the lower 48; the buy box estimate is in business days.
Before delivery
The freight company calls to arrange the window. Someone needs to be home to inspect and sign, with helpers lined up to move the panels.
At the truck
Walk around the pallet and each carton before signing. Photograph and write down any damage on the delivery receipt.
Before you build
Check the cedar panels, the glass door and the roof sheets while the packaging is still there. The SunRay shipping policy explains what to do next.
Returns. You have 20 days from the date it ships to send it back, unassembled and in its original crate. On a change of mind you pay the return freight and a 20% restocking fee may apply; we never deduct the original shipping. The steps are in the SunRay return policy.
Reference
SunRay Seneca 300D5 3 person outdoor sauna specifications
| Exterior | 78 W x 71 D x 89 H in with the metal roof; cabin 61 W x 51 D in |
|---|---|
| Interior | 57 W x 47 D x 75 H in |
| People | 3 adults, or 1 stretched out |
| Heater | 6 kW Harvia electric heater with stones |
| Electrical | 240 V, dedicated circuit, hard-wired by a licensed electrician |
| Temperature | 125 to 170 F recommended by the D5 manual; about 45 to 60 minutes to warm up |
| Wood | Western red cedar |
| Included | Stones, bucket and ladle, sand timer, hygrometer |
| Shipping weight | 750 lb, SunRay's freight figure |
| Warranty | 10 years structural; 1 year heater and electrical parts, parts only |
Full specification tables
| Roof | 78 W x 71 D in |
|---|---|
| Cabin | 61 W x 51 D in |
| Height | 89 in with roof, 85 in cabin |
| Inside | 57 W x 47 D x 75 H in |
| Seating | Deep bench with an ergonomic backrest |
| Shipping weight | 750 lb, SunRay's freight figure |
| Heater | 6 kW Harvia with stones, in a wooden cradle |
|---|---|
| Electrical | 240 V, dedicated circuit, hard-wired by a licensed electrician; sized from the heater manual and the NEC |
| Setting | 125 to 170 F, per the D5 manual |
| Warm-up | About 45 to 60 minutes |
| Use | Wet or dry; water on the stones for steam |
| Series and model | D5 outdoor contemporary, 300D5 |
|---|---|
| Species | Western red cedar |
| Roof | Metal, flat interior ceiling |
| Door | Black-framed glass |
| Exterior | Sealed, reseal every year |
| Lights | Dome light with auto shut-off, exterior light |
| Accessories | Sand timer, hygrometer, bucket and ladle |
| Base | Concrete pad, wood deck or other solid surface |
| Assembly | 2 to 4 adults, sealant and a caulking gun |
| Delivery | Free curbside freight, lower 48, lift gate truck |
| Warranty | 10 years structural, 1 year heater and electrical parts, residential |
Confirmed on your order. Whether a tube of sealant is in the crate. We confirm it with SunRay in writing when you order and send you the answer before the sauna ships.
The range
The SunRay Seneca beside the other SunRay outdoor traditional saunas
The Seneca beside its nearest SunRay outdoor models: the four seat Denali in the same D5 design, the Freeport and Waverly on the same cabin footprint, and the Cayman.
| SunRaySenecaYou are here | SunRayDenali | SunRayFreeport | SunRayWaverly | SunRayCayman | |
|---|---|---|---|---|---|
| Seats | 3 | 4 | 3 | 3 | 4 |
| Wood | Western red cedar | Western red cedar | Hemlock | Hemlock | Hemlock |
| Harvia heater | 6 kW | 6 kW | 4.5 kW | 4.5 kW | 6 kW |
| Roof | Metal | Metal | Black pitched metal | Black pitched metal | Metal |
| Roof footprint | 78 x 71 in | 89 x 83 in | 73 x 63 in | 73 x 63 in | 85.4 x 69.3 in |
| Cabin footprint | 61 x 51 in | 72 x 62 in | 61 x 51 in | 61 x 51 in | 71.7 x 61.4 in |
| Total height | 89 in | 89 in | 100 in | 100 in | 84.7 in |
| Inside | 57 x 47 x 75 in | 68 x 58 x 75 in | 57 x 47 x 73 in | 57 x 47 x 73 in | 68 x 58 x 75 in |
| Bench | Deep, backrest | L-shaped | 55 in | Rear bench | Two tiers |
| Assembly crew | 2 to 4 | 2 to 4 | 2+ | 2+ | 2 to 4 |
| Shipping weight | 750 lb | 900 lb | 819 lb | 839 lb | 963 lb |
Against the Freeport and Waverly, the Seneca keeps the same 61 by 51 inch cabin but swaps hemlock for cedar, the tall pitched metal roof for a lower one, and the 4.5 kW heater for 6 kW. Those two list Bluetooth and color lighting, which SunRay does not list for the Seneca. For a fourth seat in the same style, the Denali adds an L-shaped bench.
For the two seat Eagle and Bristow, see every SunRay sauna side by side. See every stone heater cabin in our traditional saunas collection.
Warranty
SunRay Seneca warranty: 10 year structure, 1 year heater
SunRay's warranty certificate sets the terms, and it gives the cabin and the electrics different terms.
| 10 years | Wooden panels, flooring, ceiling and glass, from purchase; parts needed for the repair |
|---|---|
| 1 year | Heater and electrical components, parts only, no labor |
| Residential use | Commercial use voids the warranty |
| Outdoors, no cover | Exterior resealed every year |
| Not covered | Carrier freight damage, misuse, alteration, installation against the instructions |
The cover stays with the original customer at the original delivery address. Cracks and small blemishes in the cedar surface are characteristics of natural wood, not defects. Any claim comes to us and we take it to SunRay. The SunRay warranty policy page has the summary; ask and we email the full certificate before you buy.
Buyer questions
SunRay Seneca 3 person outdoor sauna questions
What are the dimensions of the SunRay Seneca?
With its metal roof the Seneca covers 78 by 71 inches and stands 89 inches tall. The cabin under the roof is 61 by 51 inches and 85 inches high, and the interior is 57 by 47 inches with 75 inches of headroom.
What wood is the SunRay Seneca made from?
Western red cedar, per SunRay's specification. The Denali, its four seat sibling in the same D5 series, is also western red cedar.
What heater and electrical supply does the SunRay Seneca need?
A 6 kW Harvia electric heater with stones, needing 240 V on a dedicated circuit, hard-wired by a licensed electrician who sizes the circuit from the heater manual and the National Electrical Code.
How long does the SunRay Seneca take to heat?
SunRay's D5 manual allows approximately 45 to 60 minutes of warm-up, to a recommended setting of 125 to 170 F. On a cold day outdoors, count on the full hour.
SunRay Seneca or SunRay Freeport: which 3 person outdoor sauna?
Both stand on a 61 by 51 inch cabin. The Seneca is western red cedar under a lower metal roof, 89 inches overall, with a 6 kW heater. The Freeport is hemlock under a 100 inch pitched metal roof with a 4.5 kW heater, and adds Bluetooth and color lighting.
What do I need to assemble the SunRay Seneca?
Two to four adults, a solid level base, exterior sealant and a caulking gun. The D5 manual has sealant applied along the wall bases, the door opening and the outside corners.
How is the SunRay Seneca delivered?
By freight on a lift gate truck, free to the curb in the lower 48, with a business day estimate in the buy box. An adult must be present to inspect the shipment and sign.
What warranty comes with the SunRay Seneca?
Ten years on the panels, flooring, ceiling and glass, and one year on the heater and electrical parts, parts only, for residential use. The exterior has to be resealed every year if the sauna has no weather cover.
One last thing
Bring a cedar SunRay Seneca into the yard
Western red cedar, a 6 kW Harvia heater with stones, and free curbside freight. Add the Seneca to your cart above. If the base or the circuit is a close call, call us first.
ChaddySauna specialistMon to Sat, 9am to 6pm ET
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