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Starting Our Heat Pump Journey: 1962 build 3 bed detached house

 
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Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 45 minutes ago
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Batpred
 Batpred
(@batpred)
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Joined: 2 years ago
Posts: 1114
18/08/2026 7:38 pm  

Posted by: @majordennisbloodnok
↑

However, people don't seem to talk much about the fact that fossil fuel boilers don't HAVE to be run in an on/off way, and indeed in some European countries there is an obligation to install them with weather compensation. Even on this forum, we have bemoaned several times why the UK doesn't set up boilers that way, but I can't remember anyone here ever actually suggesting someone try doing that as a stepping stone towards getting a heat pump.

Our Vaillant boiler was working with weather comp, but operating with a low set back different temperature overnight. We limited the boiler flow temperature and found which rads were struggling to keep rooms warm.  Very useful to process the heat loss report advice and decide which rads to upgrade. 

Hopefully it will all start paying back this winter and we will manage to see further drops in our winter energy bill!

 


8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC


   
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JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 5292
18/08/2026 8:00 pm  

Posted by: @majordennisbloodnok
↑

However, people don't seem to talk much about the fact that fossil fuel boilers don't HAVE to be run in an on/off way, and indeed in some European countries there is an obligation to install them with weather compensation. Even on this forum, we have bemoaned several times why the UK doesn't set up boilers that way, but I can't remember anyone here ever actually suggesting someone try doing that as a stepping stone towards getting a heat pump.

For a year I did the closest my boiler would permit.  I ran 24*7 at it's lowest fixed ft of 50C (the boiler has an add on WC module, but I didn't possess this and it was 15 years old so not obtainable).  I manually raised the ft to 55 in the coldest weather. 

Result - lower fuel bills and greater comfort, surpassed only when I got a heat pump!


This post was modified 37 minutes ago by JamesPa
This post was modified 35 minutes ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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