Twenty minutes. Phone outside. Door shut.

A simple evening with the Forge Indoor, from the first round to the last rinse. Plus the light, and what to know before it comes home.

By SaunaBox·October 2026·4 min read
Shop the ForgeSee the routine
SaunaBox Forge Indoor in a sunlit desert home with terracotta floors
20 minStart to finish
200°FTop heat
100%Canadian Hemlock
Just youBuilt for one

The day is done. The sauna is down the hall.

That is the whole reason to have one at home. No drive, no gym bag, no waiting for a bench. You walk down the hall.

The Forge Indoor is a traditional Finnish sauna for one: a Harvia stone heater, up to 200°F, and water on the stones when you want steam. Switch it on while you clear dinner. It reaches 170°F in about 25 minutes.

Forge Indoor in a stone ensuite with towels on a teak bench

Next to the shower makes the last step easy.

The oval handle of the Forge Indoor, glowing warm against the black Hemlock A woman sits with her eyes closed inside the Forge Indoor, lit by the overhead panel Cooling off outside the Forge Indoor, wiping her face with a white towel Pouring a ladle of water on the Harvia stones for löyly The Forge Indoor in a warm wood cabin living room

Two rounds and a cool off.

Step in.

Phone outside, towel on the bench. The cabin is already hot.

Round one.

Sit back against the Hemlock. Dry heat, slow breaths. Let the room do the work.

Cool off.

Step out, drink some water, sit somewhere cool. No rush.

Round two.

One ladle on the stones for löyly (say “lur-loo”), the burst of steam when water hits the stones. Get out when you have had enough.

Rinse.

A lukewarm rinse, then leave the door open so the cabin dries. That is the night.

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Pick a color for the night.

An LED strip runs under the bench and overhead. Warm white most nights, or a color when you want the room to feel different. Tap one.

Forge Indoor lit warm white Forge Indoor lit red Forge Indoor lit magenta Forge Indoor lit violet Forge Indoor lit blue Forge Indoor lit green
8 ft ceiling
SaunaBox Forge Indoor, front view
6'7"Tall
3'7" wide  ·  3'6" deep

What to know before it comes home.

It fits where a fridge fits, under a standard 8 ft ceiling. Inside, you get 6'1" of headroom and a bench built for one.

Where it goes

Any dry, level spot indoors. A spare room, a home gym, the end of a loft.

Setup

Panels clip and lock together. Lighting and fan come pre-wired.

Care

Towel on the bench. Door open after, so the Hemlock dries.

What you need.

A dry, level spot indoors
A dedicated 240V, 20A circuit
An electrician to hardwire it
Two people, about two hours

Good to know.

How long is a session?

This routine is about 20 minutes, with around 14 of them in the heat, split into two rounds. Start shorter if you are new and go by how you feel.

Do I have to pour water on the stones?

No. Dry heat is fine. The water is there when you want löyly. Pour a ladle at a time, never a bucketful.

How hot should I set it?

The Forge Indoor goes up to 200°F. Start mid-range on the thermostat and turn it up as you get used to it.

How long does it take to heat up?

About 25 minutes to reach 170°F. Switch it on before you start winding down.

What power does it need?

A dedicated 240V circuit on a 20A breaker, hardwired by a certified electrician.

Is a sauna right for everyone?

Talk to your doctor first, especially if you are pregnant, on medication or have a medical condition. Drink water before and after.

SaunaBox Forge Indoor, front view with the door glass lit warm

Twenty minutes, down the hall.

A traditional Finnish sauna for one. Harvia heater, 100% Canadian Hemlock inside, up to 200°F.

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Sources

SaunaBox Forge Indoor User Manual, Edition 01, 2026.

Talk to your doctor before starting sauna use. This is not a medical device. For indoor use only.