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Help me keep the faith with my air source heat pump installation

 
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Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 3 weeks ago
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3336
23/04/2025 12:09 pm  

@adamk it's probably filtering different providers in the backend. This is one of the reasons we stopped referrals and endorsements directly through the Heat Geek website because there's no transparency.

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 AdamK
(@adamk)
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Joined: 4 months ago
Posts: 74
Topic starter 13/06/2025 10:01 pm  

Got a heat loss on a room after I fitted a new rad and worried it’s too big. The heat loss says 385W at 21c but the rad I’ve put in is a 600mm h x 1200 w K2 which is 634W at dt20. Should I move it to another room where I need to put a bigger one and put a smaller one in here closer to the actual heat loss?


   
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 AdamK
(@adamk)
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Joined: 4 months ago
Posts: 74
Topic starter 13/06/2025 10:04 pm  

I’ve noticed my heating/hw circuit water pump seems to be running constantly, is this normal?


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3336
13/06/2025 10:09 pm  

@adamk nope, not normal. I shouldn’t come on unless your system’s calling for heat. That’s the only time ours comes on, and when I hear it, I know it’s hearing. Check to see if your heat pump is on.

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 AgentGeorge
(@agentgeorge)
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Joined: 5 months ago
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13/06/2025 10:29 pm  

Definitely.

i had heat calcs for my rooms done, a small bedroom was assumed to be an office, so surveyor assumed 21C reqd temp. In operation, this rad warmed this room up quicker than others, and it looked too big for the room. So I swapped this with another room that was underperforming, both rooms now have similar warm up profiles 


   
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 AdamK
(@adamk)
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Joined: 4 months ago
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Topic starter 14/06/2025 12:35 am  

@editor nope no heat demand and heat pump is off apart from this 25w aprox of circulation pump.

might try turning the HP heating side off on the controller. at the mo its on weather comp with a night setback of 2c so 20c down to 18c.

This post was modified 3 weeks ago by AdamK

   
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 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 2 years ago
Posts: 2613
14/06/2025 9:30 am  

Posted by: @adamk
↑

@editor nope no heat demand and heat pump is off apart from this 25w aprox of circulation pump.

might try turning the HP heating side off on the controller. at the mo its on weather comp with a night setback of 2c so 20c down to 18c.

If it's running on WC then at night it's quite likely to heat up.  The outdoors gets quite cold at night! 

Likewise circulator pump is likely to continue running because many heat pumps simply run the circulator 24*7

If you want it off altogether then, as you say, switchimg heating off should do the trick.

 

This post was modified 3 weeks 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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