Environmental Installations
Saving Energy for your future

Frequently asked questions


What is a heat pump and how does it work?

A heat pump is an electrical device that extracts heat from one place and transfers it to another. The heat pump is not a new technology; it has been used in Sweden and around the world for decades. Refrigerators and air conditioners are both common examples of heat pumps.

Heat pumps transfer heat by circulating a substance called a refrigerant through a cycle of alternating evaporation and condensation (see Figure 1). A compressor pumps the refrigerant between two heat exchangers. In one heat exchanger, the evaporator, the refrigerant is evaporated at low pressure and absorbs heat from its surroundings. The refrigerant is then compressed en route to the heat exchanger, the condenser, where it condenses at high pressure. At this point, it releases the heat it absorbed earlier in the cycle.


How often do I need to change filter? And where can I get a new one?

Information about air filters can be found in your "Installation and Maintenance Instructions" for the product. New filters can be ordered from EIL if the filter needs changing.


Can it be docked to solar heating?

Here you can find a dockings schema which describes the above case.


In which room should the ventilation air be taken?

It is slightly up to the individual, but it is recommended to take the air from bathroom, kitchen (not kitchen fan), hall, utility room etc. The supply air to the house is often through grilles under the windows or in the walls and these are placed in other rooms where one does not extract any air. Through this one obtains a natural flow and exchange of air throughout the house.


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