Last seen: Oct 27, 2025
@editor like @jamespa, I had a list of test questions: What SCOP will you design for? Can you show me evidence of achieving that SCOP on your ins...
@ashp-bobba I agree that as an installer you probably don’t want to be the cheapest. There is plenty of work out there. If you charge more, you can ...
@drei in your original post, you said: Did the Heat Geek Elite engineer give you a design within the £800 fee, or did he just tell you everything t...
@majordennisbloodnok I read the document that you shared: "Get_to_know_your_Cosy-20.2-internal". It looks as though it automatically adjusts the wea...
@andrewj this is an interesting discussion. I am curious to understand why you are asking the question. You already have a heat pump, so surely you ...
This really depends on your heat loss and emitters. My installer and I seem to have been too pessimistic about the heat loss and maybe overshot on ra...
@heacol thanks for explaining. We have FRVs on most radiators. We have TRVs in the bedrooms instead, but they are all wide open. The temperature i...
@judith Yes I agree. They are extremely expensive. I suspect they sell very few of them, so they don’t have the economies of scale of standard rad...
@heacol this may be a silly question, but why would you need a second pump? The water pump in my Grant Aerona 290 15.5kW is happily pumping the wate...
@editor Yes, we all suffer from the Dunning-Kruger effect. It is so easy to think we understand something, when we don't - especially when it looks...
What an interesting and ambitious project. You certainly have built a big house - 650m2 is enormous! Here are some pointers: I wonder why you ...
@old_scientist 3. Some pipe work is always hidden, but some is always visible too. The pipes connected to the old boiler, water pu...
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Latest Posts
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RE: Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems
@drei I’ve been working through hundreds of radiator op...
By Lucia , 16 minutes ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
Are weather curve parameters changed through serviceman...
By Tasos , 33 minutes ago
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@majordennisbloodnok Yes, I have an iPhone and iPad....
By Morgan , 51 minutes ago
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Buying large amp bidirectional RCD and RCBO
I recently bought a 8k hybrid inverter. The vendor c...
By Batpred , 55 minutes ago
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RE: One room is colder than the rest of the house
@jamespa thanks for all the advice. Just so you know, ...
By AndrewJ , 2 hours ago
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RE: Mitsubishi Ecodan R290 10kW performance
@dgclimatecontrol I only have 1 cylinder and I can conf...
By Ecoste , 2 hours ago
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RE: Electricity price predictions
@old_scientist I also care about the environment like...
By Jeff , 2 hours ago
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RE: Daikin Octopus installation update - I saw my first defrost. 😍😂
My MMI is in the loft but I checked the pump flow rate ...
By RadWhisperer , 3 hours ago
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RE: Midea ASHP – how to set weather compensation
@pash44pump Midea has introduced the R290 series, which...
By Tasos , 3 hours ago
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RE: Grant Aerona 3 and Drayton system questions
Good man/woman that plumber! Very likely....
By JamesPa , 3 hours ago
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RE: New build installation query
@paullacey Hi I have managed to save the fil...
By JamesPa , 4 hours ago
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Thanks for the response @batpred Your conversational ...
By Transparent , 6 hours ago
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RE: What should we do with our Aga?
One slightly off-the-wall suggestion is that, if you li...
By Majordennisbloodnok , 7 hours ago
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RE: Help me keep the faith with my air source heat pump installation
I think there may be some oddities about the COP report...
By JamesPa , 9 hours ago
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
If you paid for any of the assessments try asking for t...
By JamesPa , 21 hours ago
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I've created a separate post here, wondering about radi...
By DREI , 23 hours ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@ecoste, @walnut-tree-cottage these are both great piec...
By JamesPa , 24 hours ago
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RE: Solar inverters - where does the energy go when clipping?
You will, of course, check the dimensions and weight be...
By Transparent , 1 day ago
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
17l/min is enough for only 6kW at 5C DT, not surprising...
By JamesPa , 1 day ago


