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Weather compensation- why you should use it

 
Air Source Heat Pumps (ASHPs)
Last Post by Tim441 2 hours ago
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 Tim441
(@tim441)
Noble Member Contributor
Joined: 3 years ago
Posts: 373
Topic starter 01/01/2026 10:43 am  

Brief update on weather compensation (AI). I have a LG 16kw unit installed 2020 - so 5 full years usage.

First 2 years ran on fixed flow as setup by installer. We have a meter on the heat pump as RHI grant - so know usage. Those years both circa 8050kWh pa (not exactly recorded).

After that moved to AI due to high costs and recorded monthly usage. Monthly varies a lot from year to year with different weather. But annual usage incredibly close - so seems to even out.
2025: 5756kWh
2024: 5741
2023: 5782

Saving nearly 30% vs fixed flow.
Main rooms heated to 21deg.
Bedrooms etc cooler - suits us.


Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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