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ASHP on a low income: a cautionary tale

 
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Air Source Heat Pumps (ASHPs)
Last Post by HughF 1 year ago
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 Derek M
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25/07/2022 8:33 pm  

@diverted-energy

I am very pleased that they did not add A2A heat pumps to the grant scheme, otherwise I would not have been able to install a small system for less than £1000. As soon as government incentives appear, the price doubles or triples.


   
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 HughF
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27/07/2022 12:54 pm  
Posted by: @derek-m

@diverted-energy

I am very pleased that they did not add A2A heat pumps to the grant scheme, otherwise I would not have been able to install a small system for less than £1000. As soon as government incentives appear, the price doubles or triples.

A2W is still cheap, if you don't claim a stupid grant and DIY it yourself.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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 Diverted.Energy
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28/07/2022 8:52 pm  

@hughf yes, it would have probably shot prices to bits.

DIY - is that EasyFit where your left with a coil to stuff behind the unit or cut n flared, vac tested and pressurised by an F Gas registered engineer?

I have the latter, mounted myself, piped myself but to comply, had an engineer do the last hurdle for me.


   
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 HughF
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28/07/2022 9:34 pm  
Posted by: @diverted-energy

@hughf yes, it would have probably shot prices to bits.

DIY - is that EasyFit where your left with a coil to stuff behind the unit or cut n flared, vac tested and pressurised by an F Gas registered engineer?

I have the latter, mounted myself, piped myself but to comply, had an engineer do the last hurdle for me.

For A2W, I'd always recommend DIY installers go for a monobloc unit. Couple of lengths of 28mm, mains power, job done. In fact, with the move to flammable refrigerants, I think A2W splits are going to become a thing of the past.

For A2A, I don't think anyone will sell you a unit now unless you provide details of your F Gas installer? At least that's what I've come up against this year.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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 Diverted.Energy
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29/07/2022 12:10 am  

Apologies, read as A2A.


   
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 HughF
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01/02/2023 10:36 am  

Dragging this thread into 2023 as @zoomuno is looking to sell his ASHP and move back to gas, I would suggest that the most suitable form of heating for his usage pattern would be an A2A mini split. Their 'easily turn off and onable' like an electric fan heater, yet have a COP of about 4 so will easily beat gas.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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Mars
 Mars
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02/02/2023 8:36 am  

@hughf, and the units are, correct me if I’m wrong, a lot cheaper and quicker to install.

Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU

Follow our sustainability journey at My Home Farm: https://myhomefarm.co.uk


   
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 HughF
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02/02/2023 3:25 pm  

@editor correct…. They’re very cheap to purchase. There’s actually no valid reason why an air to water unit isn’t priced similarly.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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 Derek M
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02/02/2023 7:04 pm  

Posted by: @hughf
↑

@editor correct…. They’re very cheap to purchase. There’s actually no valid reason why an air to water unit isn’t priced similarly.

Oh yes there is, it is called a £5000 bribe. 😋 

 


   
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 HughF
(@hughf)
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03/02/2023 7:38 am  

@derek-m even with the uplift in costs that come from the existence of the £5000 BUS ‘bribe’, I don’t know why a 5kW a2w isn't around the same price as a 5kW a2a…

The savings from not having to supply an indoor unit and a refrigerant line set would cover the provision of a plate heat exchanger inside the outdoor unit, a water pump and a flow sensor.

I can only assume it’s driven by the volume of units manufactured. Every single country in Eastern Europe, the  Middle East and Asia  uses a2a for space heating/cooling so there are millions being manufactured every year.

Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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