Heat Pumps

What are the costs of air source heat pumps and their current availability?

I am beginning to believe that eco-technologies are becoming a luxury item for the wealthy as the supply and instal costs are enormous and the availability is very scarce.

Over the last 10 years, nearly every project on our books has involved installing an air or ground source heat pump.

With the increasing public awareness and changing building regulations, we have recently had problems with the supply & installation of the heat pump equipment on our projects. We are now seeing a race to get the equipment installed ahead of further supply issues.


For a refurbishment of a 100-year-old 5-bedroom house, I am coordinating, our client started with the priority of upgrading the heating system to an energy-efficient – heat pump replacing all the radiators with underfloor heating.

The quote I received for the air source heat pump – and a second backup boiler for the top floor which would enable the occasional use of the loft rooms – was £18,264 This includes programable thermostats and wiring, and the commissioning of the system. The supply and instal of the hot water cylinder was £2,746

The underfloor heating for the ground floor of the house was £11,572, with a further £6,144 for underfloor heating to the 1st-floor bathroom and ensuite rooms. That’s a total of £17,716 for the underfloor heating.

And that doesn’t cover everything upstairs. The new central heating network needs to circulate at a lower temperature so we needed a new heating network of pipes and oversized radiators (to offset the lower circulated temperature of water) to the remaining bedrooms on the 1st and second floors of the house added up to £13,795

If we also include the decommissioning of the heating system at a further £2,112, the total quoted amount to replace the heating system on this project is £54,624 (including VAT)

is it ok to suggest a £50,000 saving is available if we replace the boiler with a new efficient gas boiler (with the option of hydrogen source as a future upgrade) or should I encourage my client to persist along the route of the air source heat pump and low-temperature radiator / underfloor heating strategy?

I note the new building regulations released this year are asking for all new heating systems to circulate at a maximum of 55 degrees. So I imagine these prohibitive costs and supply problems will only worsen over the next few years.

Stuart Bayley