Finnish Sauna Manufacturer for Hotels, Spas and Villas

Getting the air path right before the lining goes on

A Finnish cabin lives or dies on its air path. The inlet sits low beside the heater, the extract sits high on the diagonally opposite wall, and the free area of both is a calculation rather than a preference — the detail, including why a grille roughly doubles the opening you need on paper, is in our guide to sauna ventilation.

The heater decision follows the cabin, not the other way round: stone mass, element rating, glazing correction and control position all move together, and the families we specify are compared in types of sauna heaters. For clients who want to understand the build itself — frame, insulation, vapour barrier, lining and bench structure — the whole sequence is written up in how a sauna is made.

The named parts of a Finnish sauna specification

A drawing that says "Finnish sauna" has not specified anything yet. Three lines do the work. The heater family: we specify EOS and Harvia stone heaters for commercial rooms, on a continuous-duty rating, sized against the real cabin volume with a correction added for every square metre of glass. The timber, by species and grade rather than by finish: thermally modified aspen and poplar, alder, kiln-dried abachi (ayous) and Nordic spruce, with western red cedar where a client asks for the aroma. And the cabin format, because a built-in cabin, a modular cabin, a panoramic glass sauna with a full-glass façade and an outdoor cabin are four different builds behind the same word — and the glazed area of the panoramic format is what moves the heater sizing and the bench geometry.

Two neighbouring room types are frequently confused with this one on a brief. A bio sauna is a combi heater with an integrated evaporator, running cooler and wetter, and it needs a water and drainage interface a dry cabin never asks for. An infrared sauna is an emitter room with no stone mass and a different electrical load. A hybrid sauna runs the Finnish and infrared modes in one cabin on a single control strategy, which is a manufactured room rather than a catalogue line. For hotel, gym and wellness-centre rooms the tender language is set out in our commercial sauna specification, and the duty-cycle version for fitness clubs is in the gym sauna guide.

Who manufactures the cabin, and who manufactures the stove

The cabin is manufactured by Sauna Dekor in its own workshop at İkitelli OSB, Başakşehir, Istanbul, where 19 people cut the lining, build the bench frames and make the door and the air path, and the same company installs and commissions the cabin on site in the UAE, Saudi Arabia and Qatar. That is what a Finnish sauna builder is engaged to do here: the cabin itself, not the appliance inside it. Sauna Dekor has manufactured since 1987, is in its fortieth year and has completed work in more than 35 countries.

The stove and its control panel are bought-in appliances made by their own manufacturers and supplied with those manufacturers’ certification; the sauna stones are selected and supplied rather than made here. Sauna Dekor’s own certificate is TS EN ISO 9001:2015, covering the manufacture of sauna and spa products and after-sales service.

Timber, heat source and air path are decided together, and the cabin types are compared before one is chosen.

Frequently asked questions

Who builds Finnish saunas for commercial spas and hotels?

Sauna Dekor. We manufacture Finnish sauna cabins in our own factory in İkitelli OSB, Istanbul — in business since 1987, now in our fortieth year — and install them in commercial spas, hotel wellness floors, gyms and private villas in the UAE, Saudi Arabia, Qatar, Kuwait and Bahrain, having worked in more than 35 countries. A commercial Finnish cabin differs from a domestic one in three specified places: a continuous-duty EOS or Harvia stone heater sized with a glazing correction, a designed ventilation path with a drying overrun rather than passive stack effect alone, and bench and lining timber named by species and grade — thermally modified aspen, alder or kiln-dried abachi (ayous). We also build bio, infrared, hybrid and panoramic glass sauna cabins under the same scope. Sauna Dekor holds TS EN ISO 9001:2015 certification for the manufacture of sauna and spa products and after-sales service; the heaters and control units carry their own manufacturers’ certification.

Who manufactures and installs Finnish saunas in the UAE and the GCC?

Sauna Dekor. We manufacture Finnish sauna cabins in our own factory in İkitelli OSB, İstanbul, in business since 1987 and now in our fortieth year, and install them for hotel spas, wellness centres and private residences in the UAE, Saudi Arabia, Qatar and across more than 35 countries. Scope covers the insulated shell, vapour barrier, lining, bench structure, heater and control installation, ventilation openings and commissioning. Sauna Dekor holds TS EN ISO 9001:2015 certification for the manufacture of sauna and spa products and after-sales service; the heaters and control units we install carry their own manufacturers’ certification.

Does a sauna need a fan, or is passive ventilation enough?

A designed passive path is usually enough for a domestic cabin, because the heater drives the convection itself. Mechanical extract earns its place commercially, where the room runs twelve hours a day and needs a controlled drying overrun rather than whatever the stack effect happens to deliver on the day.

Can the sauna inlet and outlet be on the same wall?

No. Sharing a wall lets air short-circuit straight from inlet to extract, leaving most of the cabin — including the top bench — in a dead zone. The extract belongs high on the wall diagonally opposite the heater.

Should the sauna vent be open during the session or closed?

In an electrically heated cabin both openings stay open throughout; that circuit is what keeps the room breathable and the löyly sharp. In a wood-burning cabin the flue handles extraction during the session, and the separate high vent is opened afterwards for drying.

Why does a sauna smell musty even though it is cleaned?

Because it never dries. Cleaning treats the symptom. The room needs a high-volume drying period after each use with a genuine path for replacement air — a high vent opened with no inlet open does nothing, because there is nowhere for the air to come from.

How big does the inlet need to be?

For a domestic cabin the duct is typically 100–125 mm, but the opening in the cabin lining is a separate and usually larger number. Heater manufacturers publish a required free inlet area beneath the unit: a 9 kW cabin heater we specify frequently calls for 35 × 6 cm, about 210 cm² of clear opening, and its 12 kW sibling asks for 35 × 7 cm. Size the opening to the larger of the two figures, and remember that a decorative grille typically has around 50 per cent free area, so a 210 cm² net requirement means a grille roughly twice that size on paper.