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Weather compensation - your questions

 
Air Source Heat Pumps (ASHPs)
Last Post by Alec Morrow 3 years ago
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 4 years ago
Posts: 3350
Topic starter 18/08/2022 7:51 am  

We are scheduling interviews on renewables and related topics for our Renewing the Conversation series and we’ll be kicking off our new series with an interview with one of the foremost experts on weather compensation.

If you have any questions about weather compensation that you’d like answered please drop them below or DM me.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb

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 Kev M
(@kev-m)
Famed Member Member
Joined: 4 years ago
Posts: 1276
18/08/2022 10:53 am  

@editor,

 

Mars, a question that comes up quite a lot is whether weather compensation should be used for ufh.  


   
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 Benseb
(@benseb)
Reputable Member Member
Joined: 3 years ago
Posts: 109
20/08/2022 1:36 pm  

Just posted a W on this. If using Weather comp, what to do overnight?

 

serms a clash between it being colder outdoors, so flow temp goes up. But then rooms need lower temp overnight.. 

250sqm house. 30kWh Sunsynk/Pylontech battery system. 14kWp solar. Ecodan 14kW. BMW iX.


   
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 batalto
(@batalto)
Famed Member Member
Joined: 4 years ago
Posts: 1091
20/08/2022 8:03 pm  

@benseb once you are at temp the power needed drops. That said you can adjust by a degree if you want to. There isn't much in it, but it seems to be marginally more efficient to drop the thermostat over night. In the end the pump will have to work harder later on to get the temp back. I think keV looked into it 

12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
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 Alec Morrow
(@alec-morrow)
Honorable Member Contributor
Joined: 4 years ago
Posts: 216
25/08/2022 9:23 pm  

are there any experts in the U.K..

 

i’d happily volunteer on the back of my 3-400 installs over 15 yrs on boilers (the approach is the same for both boilers and heat pumps)

Professional installer


   
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