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Air Source Heat Pumps (ASHPs)
Last Post by Derek M 3 years ago
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 Phil3822
(@phil3822)
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08/06/2021 6:12 pm  

Did any of you gents require or get planning permission for the air 2 air ASHP?


   
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 Derek M
(@derek-m)
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08/06/2021 6:33 pm  

I complied with the permitted development criteria, so did not require planning permission.


   
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 Phil3822
(@phil3822)
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08/06/2021 6:41 pm  

I hope to do the same thing at some point and local companies also around here say it’s permitted. I just read the odd contradiction so ask the question ensuring the advice I get is correct which it looks like it is.


   
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 batalto
(@batalto)
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08/06/2021 7:02 pm  

@phil3822 didn't need it. 4 units in total on the side of the house

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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 Phil3822
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08/06/2021 8:00 pm  

@batalto

Thanks, good to be reassured. Your neighbours ok with it all I assume. I have this evening pressed the button on two rooms having air to air ASHP’s. No idea how many units I would end up with eventually but air to air came in far cheaper than air to water so this is me dipping my toe in the water and lowering my carbon and oil usage. Appreciate all your advice and comments. 


   
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 Derek M
(@derek-m)
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08/06/2021 9:21 pm  

Hi Phil,

I presume that you are keeping your oil boiler for the time being. If it is possible and cost effective you may wish to see if your oil boiler could be converted to use Hydrotreated Vegetable Oil (HVO), which apparently can reduce greenhouse gas emissions by 90%.

You should be aware that A2A will not provide you with hot water, and of course the fan in the indoor unit will be noisier than a radiator. 😍 

We positioned our indoor unit in the hallway above the front door, and by leaving doors open we can circulate heating or cooling to most areas, though our property is a small bungalow, which of course makes this much easier.

I forgot to mention that you cannot claim RHI.

This post was modified 3 years ago by Derek M

   
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 batalto
(@batalto)
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08/06/2021 10:17 pm  

@phil3822 they've never said anything about the noise. Frankly we don't hear the units, so I doubt they do. There is also a fence between the units and them, so probably blocks a lot of the noise. We really like having AC, it's excellent, especially in the summer. With PV when the sun shines and we need AC, it's free to run - what is not to like! In the winter we can use it to give us a burst of heat in our large room

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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 Phil3822
(@phil3822)
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09/06/2021 7:44 am  

@derek-m

Yep oil will remain and I am heavily researching HVO too, my oil boiler could take it with a minor adjustment to filtration. I am rather fond of the oil boiler as it’s very reliable no heats quickly but accept the carbon usage. 

ref air2air, cost wise it was affordable right now so viable and I got a tasty quote from a nice chap which prompted things along. I know their not incentivised but I still wanted to try it. May improve my confidence in a2w while the industry improves. Thanks for the comments. 


   
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 Derek M
(@derek-m)
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09/06/2021 11:36 am  

Hi Phil,

I had exactly the same thoughts as you when our old gas boiler sprung a water leak in February. I was considering installing an A2W ASHP, but was having difficulty convincing my wife. Changing my wife was not really a cost effective option, so I managed to convince her that an A2A ASHP would be much easier to install and would have the added benefit of providing air conditioning when needed.

I have since managed to repair our gas boiler, but use the A2A ASHP for heating whenever we have sufficient generation from our solar PV system. When the gas boiler eventually fails completely, I will be looking to install either a Hydrogen gas boiler if Hydrogen becomes available, or an A2W ASHP when they are hopefully more efficient and reliable.


   
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