Split and multi-split systems
- Wall units, floor consoles, cassettes for homes, offices, practices
- Multi-split for several rooms on one outdoor unit
- Quiet outdoor units, placed with neighbours and appearance in mind
Split and multi-split systems for homes, offices, practices and server rooms – installation, refrigerant circuit, electrical work and maintenance from one source. A dedicated division since 2024.

Air conditioning is often installed by two companies: one mounts the units, the other comes for the power connection. With us one team does both – with a refrigerant handling certificate and an electrical contractor in-house. That saves an appointment and an interface.
Since 2024 air conditioning and refrigeration has been a dedicated division at HD-Überwachung. The focus is on split and multi-split systems for living rooms, offices, practices, hotel rooms and server rooms – and on combining them with solar PV so that summer cooling runs on your own electricity.
Current units run on R32 or increasingly propane (R290). Both place requirements on location and installation. We choose the unit by room, pipe length and regulation – not by what is in stock.
Room size, window areas, use, location of the outdoor unit – including noise protection towards neighbours.
Units, pipe routes, condensate drain, electrical work and commissioning at a fixed price.
Usually one day per system: core drilling, pipework, units, vacuum, charging, electrical connection.
Operation, filter care, service interval – under contract on request.
A selection. Private customers are listed without names; contact persons for project references on request.
Ventilation and air conditioning in an operating hotel.
Split and multi-split systems for living and bedrooms, combined with PV and smart home.
Air conditioning of treatment and office rooms with quiet indoor units.
Usually not, but distance rules and noise limits apply (German TA Lärm). In rented flats you need the owner's consent. We advise on the location.
Once a year: filters, heat exchanger, condensate drain, leak test, electrical check. For larger charges the F-gas regulation requires leak testing.
R290 has a very low global warming potential but higher requirements for placement and pipe routing. We choose by installation situation – both are standard with us.
Yes, modern split units are air-to-air heat pumps and heat very efficiently in spring and autumn. For attics, extensions or workshops often the most economical solution.
Reply within one business day – with an honest assessment. English-speaking contact.