VIESSMANN VITOCAL R290 ASHP 4KW 7975826

The Viessmann Vitocal R290 ASHP 4 kW (MPN 7975826) is a compact, inverter‑driven air‑to‑water heat pump designed for efficient, low‑carbon home heating and hot water production. Its 4 kW nominal output makes it ideal for well‑insulated smaller homes, apartments, and low heat‑load properties.

Using natural refrigerant R290 (propane) with an ultra‑low global warming potential, this monobloc outdoor unit delivers high efficiency and future‑ready compliance with evolving F‑Gas regulations. The monobloc design keeps refrigerant sealed outdoors, simplifying installation with only water connections between the outdoor unit and indoor system components.

The unit is engineered to provide high flow temperatures suitable for both low‑temperature emitters (underfloor heating) and many radiator systems, supporting retrofit applications. An inverter compressor modulates output to match demand, improving seasonal efficiency and comfort while reducing energy consumption and noise.

Designed for quiet operation with an acoustic‑optimized outdoor casing and night‑time modes, the Vitocal R290 integrates with Viessmann system controls for weather‑compensated operation and can enable app‑based control when used with compatible Viessmann connectivity accessories. It can be paired with suitable cylinders, buffers, and system accessories for domestic hot water and system integration.

Installation must be carried out by qualified personnel in accordance with local regulations. As R290 is a flammable refrigerant, appropriate clearances, ventilation, and safety measures are required.

• Manufacturer: VIESSMANN LIMITED
• Model: Vitocal R290 Air Source Heat Pump, 4 kW
• Manufacturer Part Number: 7975826
• Natural refrigerant R290 (very low GWP) for future‑ready compliance
• Monobloc outdoor unit for simplified installation (water‑side connections only)
• High flow temperatures suitable for radiator retrofits and DHW
• Inverter‑controlled compressor for efficient, modulating output
• Quiet operation with acoustic optimisation and night mode
• Weather‑compensated control; compatible with Viessmann connectivity (where equipped)
• Single‑phase residential application; professional installation required