Heat Pump

Heat pumpWhenever we install a heat pump we try to ensure that it will meet the expectations of the owner, particularly the operating costs. In comparison to a conventional boiler a heat pump needs to operate at a relatively low flow temperature to achieve the efficiency claimed by the manufacturer. Whilst most heat pumps can achieve temperatures of 55 to 60°C required to heat domestic hot water, they do so at the cost of lower efficiency (= higher cost).

Our key design objective is to minimise the frequency and extent to which a heat pump needs to operate at elevated flow temperatures. This will rely on installing a heating system that is designed to maintain a sufficient room temperature at a flow temperature of between 35 and 40°C. Existing wall mounted radiators will typically have been sized based on the flow temperature of between 70 and 80°C for a gas or oil-fired boiler and are unlikely to be suitable.

Daikin Altherma is a highly flexible, energy efficient home heating system that extracts the heat from the outside air, raises this heat to a higher temperature and then distributes warmth around the home. At the heart of the system lies an air to water heat pump.

The Daikin Altherma High Temperature (HT) air to water heat pump is able to produce a water flow temperature of 80°C for central heating without using an additional electric heater. It is an ideal heat pump solution for boiler replacement and refurbishment applications. For existing heating systems, there is no need to change the radiators as Daikin Altherma HT can connect to standard high temperature radiators. The Daikin Altherma HT ranges from nominal outputs 11kW to 16kW. This heat pump offers an ideal low-hassle solution for off-gas grid properties when replacing the old heating appliance.

Complete comfort for all the family – Daikin Altherma HT is designed to meet all the heating and domestic hot water requirements right through the year, even on the coldest days. The heat pump will operate down to temperatures as low as -25°C. With a fully integrated control system, Daikin Altherma will provide consistent comfort at optimum efficiency. The domestic hot water cylinder is designed to sit on top of the indoor unit, saving valuable space, as well as providing a stylish finish. As the heat pump can heat the domestic hot water cylinder up to 75°C, Daikin Altherma HT is suitable for those homes where high volumes of domestic hot water are required.


  • Highly efficient: CoPs of over 3 when producing high temperature hot water*
  • Water flow temperatures of up to 80°C can be produced without an additional electric heater
  • Key hydraulic components including circulation pump and expansion vessel already included within the indoor unit
  • Fast hot water cylinder recovery times
  • Hot water cylinder can be stacked on top of the indoor unit, thus saving space
  • MCS accredited
  • Outdoor unit can be sited up to 50m away from the indoor unit

* ERSQ011AV1 has a COP of 3.08 at A7 W65 tested according to Eurovent rating standard 6/C/003-2006

All our installations are carried out by our partners who are MCS accredited.

To be suitable for a heat pump ideally we would look for a building to have a benchmark peak heating requirement between 35 and 45 w/m2. If a building has a higher specific heating requirement it is likely that operating costs for a heat pump will be higher. This level of specific heat loss is unlikely to be achievable in an older style property without extensive refurbishment and improvements to insulation and airtightness.

You can read more about it here http://www.energysavingtrust.org.uk/Generating-energy/Getting-money-back/Renewable-Heat-Incentive-RHI