Will heat pumps work on the coldest winter day?

Yes they will. Thousands of these systems have been installed for many years in some of the most northern parts of Scandinavia and Canada where the winters are very hard and long.

The key is the design and specification process so the system provides enough energy for the application.

For air to air heat pumps the lower limit temperature of the outdoor unit is -20 degrees centigrade.

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Worcester Accredited Installers can offer more guidance on heat pumps and many can offer extended guarantees.

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