We are in the process of completing a new build project in East Anglia for which we have "decided" (thanks architect) to install an ASHP. 

For the benefit of others, I want to start detailing (with updates to this post) the process/experience here, and see if I can help, and learn as I go along.

As a starting point, the project is a:

• Complete new build, meeting 2025/26 build regs
• 200sqm, with 140sqm of UFH

Initial Attempt at a Quote: Nu-Heat

Back in October the contractor's plumber had arranged for Nu-Heat to come on site, and after a discussion of an hour or two between myself, the plumber, contractor and Nu-Heat, as well as a sharing the floor-plan, elevations and wall build ups, they came with a super high level quote of:

• 51w/sqm heat loss
• 16KW Nibe or Panasonic ASHP (not even a model)
• 300L cylinder
• Cliptrack system
• Install and Support Package

In the intervening period, I had spent too much time on the RHH forums, and queried the quote which lacked any detail.  The result of this, was that I was given the spec of the machines (Nibe 2040 or perhaps 2050 depending on supply, and Panasonic Aquarea, or possibly Aquarea TCAP), I was also told that the Heatloss was guestimated at 51w/sqm, which, unless my math is wrong, would imply a very high level of heat-loss.

Finally, they followed up by asking for detailed insulation information, and possible SAP report -- not possible given the half built state, and unlikely to be done unless we finish the house and then think of doing one and then getting quotes for the ASHP.  We are now waiting for an update, and more accurate quote, although in the intervening period, I had been told that the heat loss numbers are unlikely to change (which seems like an odd assertion.)

Second Miss-Attempt(s) at a Quote: Heat Geeks & EON

In the meantime, whilst waiting, and with too much time in the run up to Christmas, I filed a request for a quote from Heat Geeks.  This took till after the new year for them to reply and state that they were unable to provide service for a new build project, and would recommend the engineer I had reached out to already waiting for them to respond, which brings us to the third attempt.

I had also called EON Next, our existing energy provider, and they said they could not help, as they only do retrofits.

Third Attempt at a Quote: Smart Heating Solutions

Having waited too much, I reached out to Smart Heating Solutions (Heat Geek Network), whom responded quickly, asking for a bunch of detail, which you would have thought Nu-Heat could also have asked for to make a better and more proper initial assessment of heat loss.  They suggested they would come back quickly, but Christmas needless to say got in the way.  i had to follow up a second, and a third time, when finally, they provided a detailed quote using the Spruce quotation system, with an itemised breakdown.  The kind of thing I would expect of any quote really:

• 6.7KW heatloss
• 40 degree flow temp
• 413% efficiency
• 7KW Vaillant AroTherm+
• 250L cylinder
• UFH install
• Materials etc
• BUS administration

Having read a recent and decent/comprehensive review of the AroTherm+ on RHH Forums, and the support provided by Vaillant for their systems, it also gave additional hope and promise for this quote/system, neither of which could be said for the Nibe or Panasonic systems.

Fourth Attempt at a Quote: Heat Different

Having come across Heat Different's name on the RHH Forum, and reviewed their works and recommendations, as well as seeing the award they received for the water source heat pump they installed at a project nearby, and whilst playing the wait-wait-waiting game, I reached out to Heat Different, and supplied them with the details that I had also shared to Smart heating Solutions and Nu-Heat.  They then proposed a site visit.  This is pending this week, so we shall see.  I am hopeful.

As it stands, as of Jan 11, 2026, we have:

1. One quote with a range of £10.5-£13.5K between 2 16KW options plus cylinder, with additional costs for the UFH cliptrack and install of £3K and £1200 respectively.  The cost of installation "unknown" unless the plumber doing the rest of the work provides a fixed price or correct estimate.
2. One quote for a the Vaillant and cylinder for about £6250 plus complete installation, materials bring us to ~£30K before BUS etc.

We hope to have another quote and to be able to compare heat loss calculations before the end of the month, but with everything being so slow, I do wonder.

More updates soon.