How to Choose a Sauna Manufacturer: A 12-Point Buyer’s Checklist

Sauna Dekor Spa Solutions engineering team, Istanbul · reviewed 30 September 2026 · project and press enquiries: Alican Aykaç, Managing Partner

This page used to be a list of reasons to choose us. That is not what someone comparing manufacturers needs, so we have rewritten it as the checklist we would want a client to run us through. It applies to any supplier, including this one.

For the record on which side of the table this is written from: Sauna Dekor manufactures saunas, steam rooms and hammams in Istanbul and installs them turnkey, since 1987 and in 41+ countries, with the bulk of the work in the Gulf. Every question below applies to us as much as to whoever else you are comparing.

If you are trying to decide between named brands rather than evaluate a supplier, start with our honest comparison of the major sauna brands — who owns whom, and what each is actually good at.

Most bad sauna procurement starts here, because the three are priced and warranted completely differently.

1. A prefabricated cabin. A boxed product in a standard size, factory-assembled, one warranty covering the whole thing. Fastest, lowest execution risk, no flexibility on dimensions.
2. A custom-built room. Made to the space, matched to the surrounding architecture, any geometry. Quality depends entirely on who builds it, because there is no factory QC behind it.
3. A heater and controls only. You or your contractor build the room; the manufacturer supplies the appliance. Common on projects where a joinery package already exists.

A supplier who does not ask which of these you want within the first two questions is selling, not specifying.

• A quotation with no kW rating, no timber species and no scope split.
• Heater sizing that matches the catalogue maximum rather than the room volume.
• No answer on ventilation.
• A price that is a single lump with no breakdown between cabin, heater, controls, glass and installation.
• Photographs that are all renders.
• Willingness to skip drawing approval to save two weeks. Those two weeks are where errors get caught.

The twelve questions apply to both, but they weigh differently. A residential cabin is
bought once and used by a handful of people; the decisions that matter are footprint, bench
ergonomics for the actual household, door sealing and quiet operation. A commercial cabin is
an operating asset: it runs twelve to sixteen hours a day, its benches are sat on by thousands
of people a year, and downtime costs revenue. That changes the specification — reinforced
bench structures, anti-warp profiles, continuous-duty heaters sized for peak hours rather than
average, zonal control so one room can be taken out of service without closing the floor, and
service access that does not require dismantling the room.

Ask any supplier to split the programme by stage rather than quote a single headline number.
A realistic split looks like this, and it makes clear that the long poles are approvals and
shipping, not carpentry.

• Brief and feasibility, 1–2 weeks. Site survey, heat load, ventilation strategy, constraints.
• Design and engineering, 2–6 weeks. Drawings, selections, MEP coordination, procurement plan, approvals where the authority requires them.
• Manufacture and site preparation, 2–8 weeks. Off-site millwork in parallel with electrical rough-in and ventilation routing.
• Shipping. The stage most often left out of the headline figure, and the one that slips most on Middle East and Africa projects.
• Installation and commissioning, 1–3 weeks. Build-out, controls programming, testing, training.

If the schedule is genuinely tight, ask about modular or pre-assembled construction: it moves
work off site rather than removing it, which compresses site time without compressing quality.

The gap between a room that works and a room that was merely finished is commissioning, and
it is the first thing dropped when a programme is late. A handover should include, in writing:

• A heat-up test from cold, with the time recorded
• Temperature uniformity checked at bench level and at ceiling level, not at one sensor
• Verification of the air-change rate against the design figure
• Humidity behaviour under load for combi and bio cabins
• Control calibration, interlock and over-temperature cut-off testing, door sensor check
• As-built drawings, O&M manual, declaration of conformity, warranty documents and the spare-parts list
• Operator training and a written cleaning and maintenance protocol

A supplier who cannot describe their commissioning procedure before contract will not perform
one after it.

Lifetime cost sits here, not in the purchase. A workable cadence for a commercial cabin:

• Daily. Visual check, wipe-down, aroma line purge where one is fitted.
• Weekly. Bench cleaning to protocol, floor and drainage inspection, lighting channel dusting.
• Quarterly. Heater and element inspection, sensor calibration, door seal review, stone check and replacement.
• Annually. Insulation and vapour barrier audit, ventilation flow measurement, control firmware review.

Ask, before contract, who performs each of these and what it costs. A maintenance schedule
priced after handover is priced without competition.

We have manufactured saunas, steam rooms and hammams since 1987, mostly for hotels, spas and developers across the Gulf, Africa and Europe. We are a custom manufacturer, and we use Harvia and EOS heaters inside the rooms we build — so the appliance you get is the same appliance those brands sell.

That means for a single standard-size domestic sauna, a good prefabricated cabin will beat us on value and we will say so. Where the checklist above starts favouring us is on rooms that cannot be bought off a shelf: non-standard geometry, custom cabins, multi-unit hospitality, and projects where the sauna has to be coordinated with MEP, waterproofing and a main contractor’s programme.

Run the twelve questions past us. If the answers do not stack up against another supplier’s, use the other supplier.

The twelve questions above are about process. This one is about scope, and it is the fastest way to separate a manufacturer from a reseller: ask which named cabin formats they build themselves, and ask for a project reference for each one.

• Finnish sauna — the stone-heater cabin every supplier claims. Ask for the heater sizing calculation, including the glazing correction.
• Bio sauna — combi heater and evaporator. Ask who takes the water, drain and descaling interface, because that is where the scope gap usually opens.
• Infrared sauna — emitter type stated as carbon fibre or full-spectrum quartz, with the circuit specified as a dedicated supply rather than a socket.
• Hybrid sauna — two heat sources, one control strategy. A reseller will offer a cabin with a panel added to it; a manufacturer will show how the room was detailed for the hotter condition. The formats we make are set out on the sauna range page.
• Panoramic glass sauna — ask what the glazed area did to the heater size and to the ventilation layout. If the answer is nothing, the calculation was not done.

Ask the same question of the equipment. A manufacturer names the heater and control families it commissions — EOS and Harvia in continuous-duty ratings for commercial hours — and names lining and bench timber by species and grade instead of calling it quality wood: kiln-dried ayous and pine, with aspen and alder on request.

Sauna Dekor builds all five formats under one contract and has done so since 1987, now in its 40th year, with projects in 41+ countries. Our TS EN ISO 9001:2015 certificate covers the manufacture of sauna and spa products and after-sales service; heater, generator and control certification belongs to the equipment manufacturers, and a supplier who presents an equipment certificate as their own has answered question eleven badly.

Related: the best sauna for home, decision by decision · sauna brands compared.