Indoor saunas

Three MINI Cube models with interiors from 95 to 175 × 197 cm cover a capacity of 2 to 4 people. They are delivered flat-packed, assembled in the room where they stand and heated by a Harvia electric heater. Prices start at 3 329 € including delivery.

A home sauna without building work

The load-bearing structure is made of vertical solid timber slats 44 mm thick, joined into a closed cube profile with rounded edges. A wall of this thickness stores heat and dampens its transfer into the surrounding room — which matters more indoors than outdoors. The cabin stands on the floor by itself, so it can be taken apart when moving house and rebuilt somewhere new.

Compared with an outdoor sauna there is no shingle roof, no outer shell and no roof insulation — all of which a structure standing outside all year needs. An indoor sauna therefore has a smaller footprint and a lower price, but it is not designed to be installed outdoors.

How much space an indoor sauna needs

What matters is the footprint, not the number of seats. All three models are 210 cm deep and 212 cm high and differ only in the length of the cabin:

The interior height is 192 cm in every case. Leave a gap around the shell for air circulation and for access during maintenance. If you are hesitating between two sizes, the deciding question is usually whether you want to lie down — from 160 cm of length there is room for that.

Solid 44 mm walls: spruce or thermowood

The sauna comes in two material versions. Spruce is the standard — light, good with thermal cycling and, indoors, happy with minimal maintenance. Thermowood is heat-modified without chemicals: the sugars that feed mould break down in the timber and its ability to absorb moisture drops. The result is greater dimensional stability, a darker tone and a longer service life. The surcharge for thermowood is shown in the model configurator.

Inside: benches, glass, lighting and ventilation

The benches are arranged in an L shape, so the interior works for sitting and for lying down without enlarging the footprint. They are made of thermowood — a resin-free material with low thermal conductivity that does not burn on contact with skin even at full operating temperature.

The door and window are tempered glass. The glazing keeps visual contact with the room and removes the boxed-in feeling that a small footprint otherwise creates. LED lighting runs under the benches: it shines from below, does not dazzle and casts no hard shadows.

Every model includes a ventilation system with air drawn in at floor level and extracted at the ceiling. The controlled airflow keeps the temperature even over the full height of the cabin and removes moisture after the session — indoors, that is what determines how long the timber lasts.

Heater and electrical supply

Indoor Finnish saunas are supplied with an electric Harvia heater chosen in the configurator, or without a heater. Nordic Room takes a 6 kW heater, Nordic Studio and Nordic Atrium 9 kW. At both outputs you choose between Top Steel (400 V supply) and Vega, which also runs on a single phase at 230 V — so the choice is mainly a question of the electrical supply available. A wood burner is not available for indoor models; you will find those under wood-fired saunas.

The heater is enclosed in a guard rail that prevents direct contact with the hot casing. The electrical installation and the heater connection are work for a qualified electrician. An accessory set with a bucket, ladle, sand timer and thermometer can be added in the configurator.

Delivery and assembly

Indoor models always travel flat-packed — an OSB crate arrives with the parts and detailed assembly documentation in PDF. For a sauna going into a house that is an advantage: the parts are carried in piece by piece, so the cabin can be installed where a finished unit 120 to 200 cm wide and 212 cm high would never fit. Even so, check the width of the doors and any staircase along the route before ordering.

Assembly is a job for two people with ordinary DIY skills. If you would rather not handle it yourself, add the 390 € assembly option in the configurator and our team will put the cabin together.

Price and what it includes

Prices including VAT start at 3 329 € for the two-person model. The price covers delivery to the place of delivery in Slovakia, the Czech Republic and Hungary, a 2-year warranty and our 4-year service. The lead time is 4 to 12 weeks from payment of the order. Timber version, heater and accessories are combined in the configurator, where the price appears immediately; the running-cost calculator works out the heating cost at your own energy prices.

A Finnish sauna works with dry heat of roughly 70 to 90 °C at low humidity, and the benefit comes from repeated shorter cycles rather than one long session — which is exactly what a sauna at home makes possible, with no drive, no opening hours and no booking.

Frequently asked questions

Will a Finnish sauna fit in a flat?

The smallest model, Nordic Room, needs a floor area of 120 × 210 cm and a height of 212 cm. The cabin is self-supporting, is not anchored to the walls and needs no structural work — what has to be sorted out is the electrical supply for the heater, ventilation of the room and an access route for carrying the parts in.

What is the smallest indoor sauna in the range?

Nordic Room, with an interior of 95 × 197 cm for 2 people, from 3 329 €. The larger Nordic Studio (135 × 197 cm) already allows you to lie down.

Does a home sauna need a 400 V supply?

Not necessarily. The Harvia Vega heaters, 6 and 9 kW, run on a single phase at 230 V; the Top Steel models require 400 V. The actual connection and circuit protection are assessed by a qualified electrician.

Do I have to assemble the sauna myself?

No. The sauna arrives flat-packed with detailed PDF documentation and, with ordinary DIY skills, it is a job for two people — but you can add the 390 € assembly option in the configurator and our team will do it. Connecting the heater is work for a qualified electrician either way.

Can an indoor sauna be taken apart when moving?

Yes. The cabin is self-supporting and built from jointed parts, so it can be dismantled and rebuilt in a new place.

How is it different from an outdoor sauna?

An indoor sauna has no roof, no outer shell and no roof or floor insulation, all of which a structure standing outside all year needs — hence the smaller footprint and the lower price. It is not designed for outdoor installation; for that there are outdoor saunas.