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A2A vs A2W: Which Heat Pump Would You Pick? Poll is created on Nov 24, 2025

  
  
  
  

A2A vs A2W: Which Heat Pump Would You Pick?

 
Air Source Heat Pumps (ASHPs)
Last Post by Andrew J H 35 minutes ago
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Mars
 Mars
(@editor)
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Joined: 5 years ago
Posts: 3754
Topic starter 24/11/2025 10:55 pm  

It’s looking increasingly likely that air-to-air heat pumps (essentially AC units used for heating) may soon qualify for a £2,500 Boiler Upgrade Scheme grant.

That means homeowners could soon have two subsidised options:

  • Air-to-Water (ASHP) with the current £7,500 grant
  • Air-to-Air (A2A) with a proposed £2,500 grant

Each route has pros and cons: installation cost, comfort, efficiency, hot water, running costs, and complexity all differ.

So the big question for homeowners is, if both were subsidised, which would you install: A2W or A2A?


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 Andrew J H
(@andrew-j-h)
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Joined: 2 months ago
Posts: 9
24/11/2025 11:38 pm  

I think the main reason a2w is more popular in the uk is the grant. Long term, I think air to air will be more common, when the grant is removed for a2w I think the market could collapse for this unless the spark gap is reduced. A2a is more viable financially even without a grant and the air con element is only going to get more important in future.

If the same price I would go for a2w at the moment as I have not really experienced a2a heating, so I would be reluctant to remove radiators etc then find out it is not as comfortable.

I would also be unsure how many units I would need for A2a and whether I could get by with 2 units or need them in each room. 



   
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