SaunaBox Forge 1-Person Traditional Finnish Sauna

SAUNABOX

SaunaBox Forge 1-Person Traditional Finnish Sauna

$4,990.00 $5,500.00 Save $510.00

The SaunaBox Forge is a 1-person traditional Finnish dry sauna with a 3.5 kW wall-mounted electric heater and sauna rocks. It reaches up to 200 °F and heats to 170 °F in about 25 to 45 minutes.

The cabin has a Canadian hemlock interior and frame, matte black aluminum cladding, a black-tinted tempered glass door and RGB lighting. It is built for year-round outdoor use in rain, sun and snow, or indoors.

The Forge runs on 240 V and must be hardwired by a licensed electrician on a dedicated breaker. Pour water on the rocks for steam.

Heater: 3.5 kW wall-mounted electric heater with sauna rocks
Type: 1-person traditional Finnish dry sauna, outdoor or indoor use
Temperature: up to 200 °F (93 °C); about 25 to 45 minutes to 170 °F from cold
Capacity: 1 adult on a single bench with an S-shaped backrest
Exterior: 43.3 W x 41.3 D x 80.7 H in
Interior: 39.4 W x 37.8 D x 72.8 H in
Bench: 26.4 in high, 20.5 in deep
Assembled weight: 472 lb
Power: 240 V hardwired, 14.4 A on a dedicated double-pole breaker (typically 20 A); licensed electrician required, no plug; peak draw about 3,620 W
Ventilation: 1 fan plus intake and exhaust vents
Materials: Canadian hemlock interior and frame, matte black aluminum cladding, slatted wood floor, raised feet
Door: full-length black-tinted tempered glass
Lighting: color-selectable RGB LED under the bench and overhead
Warranty: 2 years

Up to 200 °F
Reaches 170 °F in about 25 to 45 minutes.
3.5 kW rock heater
Pour water on the rocks for steam.
240 V hardwired
14.4 A on a dedicated breaker, electrician installed.
Outdoor or indoor
Hemlock cabin with aluminum cladding.

Flexible Financing Options

Monthly financing: from $450.39/mo est. 15% APR, 12 months with Shop Pay Installments

Plan	Monthly	Interest	Total paid

Add this product to your cart.
At checkout, choose Shop Pay Installments as the payment method.
Pick your plan: 4 interest-free payments or monthly financing up to 12 months.

Shop Pay Installments is provided by Shopify in partnership with Affirm, for US orders from $35 to $30,000. The estimate assumes 15% APR over 12 months; rates range from 0 to 36% APR. Subject to an eligibility check; your actual rate and plans are shown at checkout. Prices exclude tax and shipping.

Tax free (except CA)

30 day returns

Free USA shipping

2 year warranty

The SaunaBox Forge is a 1-person traditional Finnish dry sauna with a 3.5 kW wall-mounted electric heater and sauna rocks. It reaches up to 200 °F and heats to 170 °F in about 25 to 45 minutes.

The Forge runs on 240 V and must be hardwired by a licensed electrician on a dedicated breaker. Pour water on the rocks for steam.

Heater: Harvia Vega Compact BU 3.5 kW, model HCBU352401, wall-mounted with sauna rocks (Longevity Based is not affiliated with Harvia)
Type: 1-person traditional Finnish dry sauna, outdoor or indoor use
Temperature: up to 200 °F (93 °C); about 25 to 45 minutes to 170 °F from cold
Capacity: 1 adult on a single bench with an S-shaped backrest
Exterior: 43.3 W x 41.3 D x 80.7 H in
Interior: 39.4 W x 37.8 D x 72.8 H in
Bench: 26.4 in high, 20.5 in deep
Assembled weight: 472 lb
Power: 240 V hardwired, 14.4 A on a dedicated double-pole breaker (typically 20 A); licensed electrician required, no plug; peak draw about 3,620 W
Ventilation: 1 fan plus intake and exhaust vents
Materials: Canadian hemlock interior and frame, matte black aluminum cladding, slatted wood floor, raised feet
Door: full-length black-tinted tempered glass
Lighting: color-selectable RGB LED under the bench and overhead
Warranty: 2 years

Forge 1-person sauna cabin with 3.5 kW heater
Sauna rocks
Water bucket and ladle
Wooden foot stool

Have a licensed electrician hardwire the heater before first use.
Start with shorter sessions and build up.
Ladle small amounts of water onto the rocks for steam; never pour water on the heater controls.
Drink water before and after a session.
Talk to your healthcare provider before sauna use if you are pregnant or have a heart or other medical condition.
Leave the vents open after use so the cabin dries.

2 year warranty

For shipping timelines and delivery details, please review our Shipping Policy.

If you have any questions before or after your purchase, call us at +1 (800) 686-5898.

30 Day Hassle-Free Returns

Most eligible products may be returned within 30 days of delivery in original condition and packaging. See our Refund Policy for full details.

Availability:

In Stock, Ready to Ship

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SaunaBox Forge against the other Traditional Saunas

Specifications as published by each manufacturer. Only models in stock are shown.

Swipe to compare models

Specification	This model SaunaBox Forge	Medical Sauna Traditional 7	Medical Sauna Traditional 6	Medical Sauna Traditional 5
Price	$4,990.00$5,500.00	$12,199.00$27,999.00	$9,199.00$21,999.00	$4,999.00$10,999.00
Type	Traditional (electric rock heater, hemlock)	Traditional (electric heater, hemlock)	Traditional (electric heater, hemlock)	Traditional (electric heater, hemlock)
Capacity	1 person	4 person	3 person	2 person
Power	240V hardwired, 20A breaker	220V/30amp	220V/30amp	220V/30amp
Temperature	Up to 200 °F	–	–	–
Size	43.3 x 41.3 x 80.7 in	–	–	–
Features	hemlock wood, outdoor rated, RGB lighting	hemlock wood	hemlock wood	hemlock wood
Warranty	2 year warranty	lifetime warranty on wood, 1 year on components	lifetime warranty on wood, 1 year on components	lifetime warranty on wood, 1 year on components
Shop	Add to cart	View details	View details	View details

See every model on the Traditional Saunas page. Ask our team for the full spec sheet for any machine.

Why the SaunaBox Forge

The Forge is a compact traditional sauna for one, with a rock heater that reaches 200 °F and a cabin built for outdoor use.

Up to 200 °F with steam from the rocks

3.5 kW wall-mounted heater

Canadian hemlock interior

Outdoor or indoor installation

Add to cart

1-person Finnish sauna

A compact traditional cabin for one adult.

Matte black exterior

Aluminum cladding over a hemlock frame.

Tinted glass door

Full-length black-tinted tempered glass.

3.5 kW rock heater

Wall-mounted, with sauna rocks for steam.

Hemlock interior

Canadian hemlock bench, walls and floor.

Contoured backrest

A single bench with an S-shaped backrest.

RGB lighting

Color-selectable LEDs under the bench and overhead.

Vented cabin

One fan plus intake and exhaust vents.

How to use the SaunaBox Forge

1 - Place and wire

Set the Forge on a level base and have a licensed electrician hardwire it to a dedicated 240 V breaker.

2 - Heat the cabin

Load the rocks, switch on the heater and allow 25 to 45 minutes to reach 170 °F.

3 - Use and vent

Ladle water on the rocks for steam, then leave the vents open to dry the cabin after use.

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FAQs

What power does the Forge need?

240 V, hardwired, 14.4 A on a dedicated double-pole breaker (typically 20 A). A licensed electrician must install it; there is no plug. Peak draw is about 3,620 W.

How hot does it get?

Up to 200 °F, measured above the heater at the top of the cabin. It reaches 170 °F in about 25 to 45 minutes from a cold start.

How big is it?

Exterior 43.3 W x 41.3 D x 80.7 H in, interior 39.4 x 37.8 x 72.8 in, and 472 lb assembled. It seats 1 adult.

How is it different from the Solara?

The Forge is a traditional rock-heater sauna that reaches 200 °F and is rated for outdoor use. The SaunaBox Solara is an indoor infrared sauna that plugs into an outlet.

Is there a warranty, and can I return it?

The Forge carries a 2 year warranty from SaunaBox. Most eligible products may be returned within 30 days of delivery in original condition and packaging.

How does shipping work?

Free shipping to domestic USA addresses in the lower 48; Alaska and Hawaii by quote. Large items ship by freight, curbside. The Forge ships in one crate (85 x 59.4 x 37.8 in, 571 lb gross); unloading needs a forklift, or 2 people with a pallet jack.

Where can I find longevity devices similar to the SaunaBox Forge?

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