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Air Source Heat pumps | Ground Source Heat pumps | Exhaust Air Heat pumps

The exhaust air heat pump unit extracts air via ductwork connected to the warm areas of the building such as bathrooms, kitchens and utility rooms. Heat is removed from the air and transferred into the heat pump’s refrigerant circuit before being discharged to the outside.

The vapour compression cycle of the heat pump then raises the temperature of the refrigerant and transfers the heat into a water based system that can either warm the domestic hot water or heat the building.

The efficiency of any heat pump is measured in Coefficient of Performance (CoP). A CoP of 3 means that for every kilowatt of electricity put in, you get 3 kilowatts of energy in the form of warm water. The flow temperature of the warm water is typically between 35˚C and 45˚C; much lower than achieved by a domestic boiler. The units are perfectly capable of generating higher temperatures but the CoP suffers meaning the economic and ecological benefits may be affected. Keeping the temperature at the lower end of the scale keeps the system operating at maximum efficiency. Exhaust air heat pumps supplied by Nu-Heat can achieve a CoP of up to 3.4.

An exhaust air heat pump should cover the heating requirements of a well-insulated property in all but the coldest conditions. When used in combination with its integral immersion heater both heating and hot water needs should be met – the immersion heater boosting water temperatures when necessary. When working efficiently the unit can reduce energy consumption for heating by up to 50% when compared to conventional heating systems.

The exhaust air heat pump is the perfect partner for Nu-Heat warm water underfloor heating giving comfort, low running costs, long life and minimal maintenance.