Considerations and Assumptions
Please note: The data provided in our heat pump calculator are approximations, and individual circumstances will determine the size needed and final installation costs.
Our heat pump calculator focuses on air-to-water heat pumps – the most commonly installed heat pumps in Ireland.
Ground source and water source heat pumps have considerably higher installation costs, while air-to-air heat pumps may be cheaper.
Insulation levels and heat pump temperature are factors which will determine the ideal size of heat pump for your home.
Heat Loss Indicator: Homes built prior to 2005 typically have a Heat Loss Indicator (HLI) of above 2, and insulation and/or window upgrades will be required for these homes prior to heat pump installation to ensure peak efficiency and cost-effectiveness.
Homes built between 2005 and 2011, the HLI may be around 2, and for homes constructed after 2011, they should have a HLI of below 2.
Inadequate insulation could affect your SEAI grant application as grants are only offered to homeowners whose house or apartment has a HLI of 2 or below.
SEAI grants are offered to homeowners in Ireland for air source heat pumps, ground source heat pumps and water source heat pumps.
To be eligible for an SEAI heat pump grant, the house must have been constructed and inhabited prior to 2021.
Homes built before 2007 require a Technical Assessment, towards which the SEAI offers €200.
Homeowners in any type of house are eligible for the maximum grant value of €6,500 for air-to-water heat pumps, whereas apartments can receive €4,500 towards heat pump installation.
Air-to-air heat pumps, which do not heat water, are the exception, with lower grant values from the SEAI. The maximum homeowners can apply for is €3,500.
Homeowners with properties with a BER rating of B3 or lower can apply for the SEAI’s One-Stop Shop Service which offers a range of grants to help these homes achieve a minimum rating of B2.
