EOS M3 — manufacturer's product shot 1, manufacturer product image 2

Photo: EOS Saunatechnik

EOS M3 — sauna heater

EOS · EOS Sauna Heaters

Short answer: EOS M3 is a sauna heater made by EOS Saunatechnik in Germany. Sauna Dekor sizes, supplies and installs it in the saunas we build; the product and its certificates are the manufacturer's.

Control integrated into the body; for residential cabins.

Category: Sauna heaters
Series: Standard series
Power options: 3 kW
Manufacturer: EOS Saunatechnik · Germany
Capacity: Selected by cabin volume

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EOS Sauna Heaters

Model note

What the EOS M3 is

What sets the M3 apart is that the control unit is built into the body: no separate panel, no separate wiring, no sensor to mount. The thermostat is set between 40 °C and 110 °C, and the heating time is limited to 4 hours. There is one output, 3 kW, fed from 230 V single phase with a 1 × 16 A fuse — the shortest route to a sauna in a house without pulling a separate three-phase supply. The three-shell stainless steel body hangs directly on the cabin wall; the installation dimension is 470 × 310 × 208 mm and the depth only 20 cm. Turning the outer shell around puts the control section on the right or the left. The stone chamber takes 8 kg and the cabin range is 3–4 m³.

Close alternatives we also supply and install: the EOS Thermat (4.5 kW · 6 kW · 7.5 kW · 9 kW), the EOS Moment (6 kW · 7.5 kW · 9 kW), the EOS Edge (7.5 kW · 9 kW). It belongs to the EOS Sauna Heaters. The EOS overview lists every range.

Technical specifications

EOS M3 specifications

Category	Sauna heaters
Series	Standard series
Power options	3 kW
Manufacturer	EOS Saunatechnik · Germany
Capacity	Selected by cabin volume
Electrical connection	230 V N ~ 50 Hz
Fuse	1 x 16 A
Temperature control range	40 – 110 °C
Installation dimensions H/W/D mm	470 / 310 / 208
For cabin size	3 – 4 m³
Min. dimensions of air intake and exhaust vents	20 x 4 cm
Weight without stones and package	8.5 kg
Stone filling	8.0 kg

Values: EOS Saunatechnik's published product information (read 15 September 2026). Figures not listed here are sent with the manufacturer's technical sheet.

Selection

How we find the right capacity

We work out the capacity from the cabin volume; the five steps below are done together at the quotation stage.

Start with the cabin volume

Basic rule: cabin volume (m³) × 1 kW. A 2 × 2 × 2.10 m cabin is 8.4 m³ and needs about 9 kW. This figure is a starting point, not the answer.

Add glass and uninsulated surfaces

Add 1.2 m³ to the volume for every m² of glass front, and about 1.2 m³ for every m² of uninsulated concrete or stone. In a cabin with a full glass front, the real requirement is thirty to forty percent above the bare volume.

Agree the power supply early

Above 9 kW a 400 V three-phase supply is required; for lower outputs the phase is chosen according to the heater's installation manual. The heater is fed on its own circuit, with its own fuse and residual current device.

State the usage intensity

A home cabin used two hours a day and a hotel cabin open for ten hours cannot use the same unit. For commercial use, heavy-duty (HD) units and a larger stone mass are chosen.

Choose the control together with the heater

The power a control unit can switch directly is limited; above that, a PEB power boost unit is needed. This is calculated at the quotation stage.

Why EOS

Five series, one ecosystem

The logic you set up in a home works in a hotel too.

Five series, one control family

The same control family runs from the Standard series up to the large commercial series. The logic you set up in a home works in a hotel too.

Modular control

Sauna, hammam, steam and infrared modules plug into the EmoTouch 3 unit. Four rooms are run from one panel, with no separate switchboard.

Open to building automation

With the KNX and Modbus module it connects to the hotel management system, and opening hours can be programmed centrally.

Safety as a separate line

Door contact, emergency button, heater guard and EOSafe are available as separate products. In a commercial facility they are not optional.

Spare parts stock

We keep spare parts in stock in Istanbul for the equipment we install. In a commercial facility, what keeps a cabin closed for months is waiting for parts.

Around 20 years with EOS

We have been installing EOS equipment for around 20 years, so we know from site work how each unit performs in each room volume.

Frequently asked questions

Who manufactures the EOS M3?

EOS Saunatechnik, in Germany. Sauna Dekor sizes, supplies and installs it; the product warranty and certificates are the manufacturer's.

Does Sauna Dekor install the EOS M3?

Yes. We size, supply and install the EOS M3 as part of the saunas we design, manufacture and build, in the Gulf and our other markets.

What are the main specifications of the EOS M3?

Category: Sauna heaters; Series: Standard series; Power options: 3 kW; Manufacturer: EOS Saunatechnik · Germany. Values are from the manufacturer's published product information.

Sources