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Heat pump installation quotations

Mars · 2022-04-10T20:02:54Z

Against my better judgement I stumbled into a social media discussion about tradesmen quotations and how UK tradesmen are “offended” if consumers and homeowners ask for breakdowns: materials, equipment and labour. The general stance from the discussion was “this is the price, if you don’t don’t like get someone else to do the work”. Our quotation that we approved for our ASHP had a breakdown: heat pump, HW cylinder, metres, heat loss pipe and labour. It wasn’t a detailed breakdown, but good enough to see what was covered and what wasn’t. This got me thinking - how detailed were the quotes you received for your heat pumps - were there any breakdowns?

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Air Source Heat Pumps (ASHPs)

Last Post by sttpd1917 47 minutes ago

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Batpred

(@batpred)

Noble Member Member

Joined: 1 year ago

Posts: 1022

15/06/2026 7:09 pm

Posted by: @sttpd1917

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The house does lose heat. If the heat is off over night during winter it'll be cold in the morning. The open fireplace in the living room is the only draughty spot in the house. Annual gas consumption is 14,313 kwh. Cavity walls are not insulated and its not an option. Loft has some insulation and more will be added. However, we've been told that this won't make much of a difference.

Thank you for taking the time to look at those numbers.

I ran a quick check using https://renewableheatinghub.co.uk/does-your-installers-heat-loss-figure-actually-stack-up/

This is what it says:

Based on 14,313 kWh gas annually, the implied heat loss range is 4.8-7.2 kW. Your estimate of 9 kW is above this range. Either the estimate is too high or the property has unusually poor fabric. Challenge this figure before proceeding. This is a sanity check, not a precise calculation. Note: the W/m2 check and this consumption check reach different conclusions - investigate before proceeding.

8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC

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