Bi-O Mat U

Concealed installation - Behind-the-bench heater with integrated vaporizer for private and commercial saunas.

The special behind-the-bench combi-heater provides two important advantages – it is installed behind a partition wall with only 22 cm gap to the sauna wall, which saves a lot of valuable space in a sauna cabin. This will allow more space for sauna benches and will make your sauna look more spacious. Very slim design - only 20 cm depth.

The concealed installation ensures at the same time increased safety in use - the heater cannot be accidentally touched while it is hot. A special safety grill mounted along the top edge of the partition wall effectively prevents objects from being dropped down on the heater.

The traditional water splashes are of course possible. Every heater includes a water funnel with the connection hose. Thanks to the special gutter inside the heater the water is spread across its full width for a quick and effective evaporation.

The Bi-O Mat U with integrated vaporizer for flexible climate forms is ideal for private and commercial operations. Based on the proven 46.U heater construction. Very Robust, long-lasting construction. All made of stainless steel.

1,5 kW vaporizer with 5 l water tank, manual filling (auto-filling optional). Dry run protection with acoustic alarm. Dust collecting bottom tray. Integrated full-width infusion gutter. Water funnel with 1 m silicone hose. 6 m connection cable 5 x 1.5 mm² and protective safety grill included.

15 kg sauna stones included in delivery.

Available as (6,0 kW / 7,5 kW / 9,0 kW / 12,0 kW):

  • Vaporizer lefthand side (Art.-Nr: 944890 / 944891 / 944892 / 941127)
  • Vaporizer righthand side (Art.-Nr.: 944893 / 944894 / 944895 / 942817)


Your advantages:

  • Flexible sauna climate settings.
  • Vaporizer 1,5 kW (12 kW version: 2 kW) with dry run protection and acoustic water shortage alarm. Manual filling (automatic refilling optionally possible).
  • Space-saving design - thanks to the hidden installation.
  • High safety - no risk of touching the heater.
  • Safety grill - reliable protection against objects falling down on the heater.
  • Still allows classic water splashes on the rocks.
  • Very robust, durable construction, all made of staineless steel.
  • Very slim design – only 20 cm depth.
  • Includes accessories: cover protection safety grill, water splash funnel with 1 m silicone hose, 6 m connection cable 5 x 1,5 mm².
  • 15 kg rock store, stones included in delivery.
Power Item no.
7,5 kW 944891 - Vaporizer left
9,0 kW 944892 - Vaporizer left
12,0 kW 941127 - Vaporizer left
7,5 kW 944894 - Vaporizer right
9,0 kW 944895 - Vaporizer right
12,0 kW 942817 - Vaporizer right
6,0 kW 944893 - Vaporizer left
6,0 kW 944893 - Vaporizer right


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