Applications

Installation types

Dimplex LI MER air source heat pumps are suitable for the following types of application:

Domestic – The LI MER range uses a single phase electricity supply, making them suitable for installation in UK homes

Non domestic – for light commercial applications with low heating/cooling load demands (i.e. up to 11kW).

Multiple heat pumps can be installed in parallel if required.

Heating system types

Dimplex LI MER air source heat pumps are suitable for use with the following types of heating distribution system:

Underfloor heating – the ideal choice for use with a heat pump. The larger heating surface area available allows lower water temperatures to be used (i.e. 35ºC - 45ºC), helping to improve the efficiency of the heat pump system.

Radiators – The LI MER range has a maximum water output temperature of 55ºC, making it possible for use with radiators providing the radiators are correctly sized.

Boiler systems usually run at much higher water output temperatures (75ºC +), therefore for lower water temperatures produced by a heat pump, the size of each radiator has to be approximately doubled to enable the same level of heat output.

Domestic hot water

Stored hot water - when used with a correctly sized Dimplex hot water cylinder, the LI MER range can produced stored water temperatures of approximately 50ºC.

Where there is a requirement to store water at higher temperatures, this can be boosted with a supplementary electric heating element installed in the water cylinder and controlled by the heat pump WPM controller.

Cooling

It is possible to us Dimplex LI MER air source heat pumps in the following ways for cooling:

Silent cooling – using underfloor heating (or other surface heating systems) by passing cool water through them.

Large cooled surfaces reduce the room temperature by approximately 3-5ºC, without draughts or air movement.

Dynamic cooling – via fan convectors able to cool (or heat) the air in the room according to need.