Last seen: Jun 18, 2025
1600kWh total import in January, all-electric house, around 1200kWh of which will be ASHP heating and hot water. January was about 25% of our annual i...
Weekend upgrade, Primary Pro done properly, unlike my installer’s attempt. Less heating the street hopefully 😉
@jamespa it's seldom adequately understood even by us [so-called] engineering professionals. There was an excellent series of articles published in th...
I think there's a sector of the energy efficiency retrofit industry that is well meaning, but simply incompetent. There are two passive retrofit measu...
Hi there, and welcome @wyf. Glycol might not be compatible with all compression fittings that use rubber or neoprene sealing systems. Needs checking. ...
I would insulate them, and any other valves bodies and buffer thank bulkhead fittings, etc. not currently insulated. You can't really over-insulate pi...
Hello @davidm06, Grant 10kW owner here. We experience the same, the Grant Aerona R32 is a defrost-happy unit, one which will defrost every 40-50 minut...
@jamespa it's a good find, thank you. Some inaccuracies however, including the assumption that split air source heat pumps have the compressor inside ...
Our 10kW Grant Aerona also gets noticeably louder when cold. There's a few reasons why: 1. The ASHP is working very hard, the compressor frequency i...
Hi @steam-powered, @mikefl makes good points above, especially balancing the low loss header if you have one. If you don't have any flow setting or mo...
Our 2024 year end summary: 1992 EPC C house (76%) 155m2. 10kW ASHP primary CH & DHW, 5kW wood stove secondary heating for colder winter evening us...
Rubbish in = rubbish out.EPCs are not reliable with too many assumptions at the discretion of the energy assessor. I downloaded the MCS 031 system p...
Latest Posts
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RE: Mitsubishi cycling while on chilled water output
Yes, but hopefully only for a few days of the year. If...
By JamesPa , 1 hour ago
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@jamespa Thanks for the advice - very helpful. I had al...
By abam48 , 3 hours ago
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RE: Weather compensated secondary circuits with Biomass
Hi @andycoo we do an LK 110 standalone weather compensa...
By Sune , 4 hours ago
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RE: Adding battery storage to SolarEdge PV system
@chandykris No need to apologise at all! I forgot to ad...
By Toodles , 22 hours ago
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RE: Say hello and introduce yourself
Yes please do Suggesting a loss in the region...
By JamesPa , 22 hours ago
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RE: Surface mount or bury primaries for heat pump installation?
Can we have some links to those you're considering plea...
By Transparent , 22 hours ago
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RE: Commencing on an ASHP Installation Process
That outside pipework would concern me. Surely rigid se...
By benson , 2 days ago
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As I have reported elsewhere we turned on the cooling o...
By downfield , 2 days ago
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@hughf, I think we’ll organise an RHH session at Instal...
By Mars , 3 days ago
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@el3b Hi, sorry to hear that, it is advisable to instal...
By ASHP-BOBBA , 3 days ago
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RE: Difficult positioning of air source heat pump
@rikiarn Out of intrigue, the thread reads as though Ai...
By Sheriff Fatman , 3 days ago
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RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop
@m1kegibson If you are able to access the service me...
By HarriUp , 3 days ago
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RE: When will heat pumps and install prices come down?
... which of course is impossible because the world mov...
By JamesPa , 3 days ago
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RE: Battery storage to run Heat Pump.
I would be surprised if the battery chemistry is going ...
By Transparent , 4 days ago
