Operated with an outdoor unit, which transports heat from the air to the indoor heat exchange apparatus by the aid of liquid coolant. Exception – the models of 8,5 kW up to 17,5 kW. Their heat exchange apparatus set in the outdoor unit.
Is suitable for indoor area 60...300 m2 during the outdoor temperature is +12...-20°C. (The heat pump). Provides the best operational efficiency during the outdoor temperature +6°C and higher or in case of outdoor temperature -5...-15°C (when the air humidity becomes lower and the frosting becomes lower too due to the better heat exchanging.
The most efficient in case of under-floor heating (optimal inside coolant temperature = 30°C). In case of using of radiators the amount of their sections have to be enlarged for 10-40%.
Average efficiency: 1 kW of electric power produces 3 kW of heating power.
In case of outdoor temperature -15°С and lower some additional heating sources is recommended to keep comfortable temperature conditions.
Allowing to cool apartments during hot summer season. The under-floor coolant temperature must not be lower 17-18°С – to avoid condensed moisture (in case of radiators some collectors for moisture or fan coil are required.