Low temperature heatpumps are suited to operate with low temperature distribution systems like underfloor heating, low temperature radiators and fan coil units. The lower the output water temperature the more efficient their operation. The Daikin Altherma Low temperature heat pump range can achieve COP’s of up to 4.66 at A7W35. Water temperatures of 55°c can be achieved in space heating and 60 °c in domestic water while operation is possible down to an external temperature of -25°c on select units.

A Heat pumps high efficiency is made possible by the vapour compression cycle which uses a small amount of electrical energy to transfer between 2 and 4 times more thermal energy from the external air into the heating system water. Based on current oil and electricity prices, a heatpump can realise annual fuel bill savings of up to 70% when compared to oil or LPG boilers.

Points to note when comparing Heat pumps to Oil / LPG Boilers

1. Heat pumps operate at up to 70% cheaper that Oil / LPG boilers
2. Heatpumps do not require oil tank, fuel re-order, fuel theft safeguards.
3. No Carbon Monoxide emissions from heat pumps.
4. No flue required therefore flexibility in position of indoor unit.
5. Graduated bills via electrical provider as opposed to large one off oil bills.
6. Additional hardware and control features available as standard.
7. Reduced carbon emissions.
8. Provides an outlet for indigenous wind and wave energy in the domestic market thereby reducing fuel import dependency
9. Where underfloor heating is installed, a heatpump can provide the renewable energy requirement to meet the requirements of Part L of the building regulations.

In most cases a heat pump installation will cost no more than a boiler / solar combination to install and the heat pump will operate at significantly lower running costs so in simple terms it makes economic since to install heat pumps in new build houses and in many cases, subject to survey, in existing houses also.