The German company Bosch has developed an air heat pump that uses propane (R290) as a refrigerant. It can produce 3.9 kW to 6.7 kW of heat and hot domestic water up to a temperature of 75 C. According to it, the heat pump can be combined with rooftop solar energy to maximize own consumption.
The Compress 6800i AW heat pump is designed for retrofits and new buildings, both detached and detached houses. Its heating power is 3.9 kW – 6.7 kW, dimensions 800 mx 1,100 mx 540 m and weight 143 kg.
It has a coefficient of performance (COP) of 4.8, according to the company’s data sheet. The temperature of the air source can vary between -22 and 45 C. The heat pump can allegedly produce hot water up to 75 C and up to 65 C outdoor air down to -10 C. Its seasonal coefficient of performance (SCOP) for heating water to 35 C ranges from 4.57 to 4.58, while SCOP for 55 C applications ranges from 3.32 to 3.51.
“To save energy – and heat more sustainably – the air-to-water heat pump can be combined with Bosch Energy Manager and self-generated solar energy,” said Bosch.
It claims that the Compress 6800i AW is the quietest heat pump in its range. The noise level varies from 51.2 dB(A) to 57.5 dB(A) during the day and from 43.4 dB(A) to 46.2 dB(A) at night. “
At a distance of three meters, the sound pressure level is only 28.5 dB(A), which roughly corresponds to the sound of a light wind,” said Bosch.