21.01.2026

How to modernize a heating system effectively?

Small buildings, big challenge: how to modernize a heating system effectively?

HEATER CONDENS water unit heaters are designed specifically for projects like these:

  • - Low supply temperatures – energy savings when used with heat pumps and condensing boilers
  • - Intelligent power modulation – EC motors adjust output to actual heating demand
  • - Compatibility with all heat sources – from heat pumps and condensing boilers to traditional coal-fired boilers
  • - Fast and easy installation – simple wall or ceiling mounting
  • - Wide output range – 10–120 kW for precise sizing across different building volumes
  • - Mobile app control – remote temperature control and adjustment via smartphone

Want to find out which model is right for your project?

- Use our selection app:
SONNIGER - Selection Software

Back
25.11.2025
New! - Air curtains in the selection application
Easy selection of GUARD air curtains
19.11.2025
GUARD PRO air curtains and APEN gas heaters
Available straight from the warehouse, within 24 hours!
13.11.2025
HEATER CONDENS EC
Energy efficiency, comfort, and smart control
10.11.2025
GUARD ONE Plug&Play
At the best price, available immediately!
04.11.2025
Get the advantage!
Meet this season’s winners!
30.10.2025
Get the advantage with SONNIGER’s Design Department!
We assist in selecting water and gas heaters, air curtains, and destratifiers — providing complete technical support at every stage of your project.
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