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Last seen: Jun 26, 2026
@editor Freezing fog seems to be an ASHP's nemesis. When similar weather is forecast I'll pop downstairs, light the log burner first thing and switch ...
Hi Emma, check what your house thermostat is doing set at 16/17degC. Is it switching the ASHP on and off continuously? If it is that's a very ineffici...
@knukes Hi, thanks for sharing. The Grant weather compensation parameters are quite straight forward to adjust once you get into the settings in the l...
Hi Chris, there's some fantastically experienced and knowledgeable ASHP people here, you've come to a good place for help. As others have said, based ...
@editor Yes, both by Thrift Energy
I don't think you're that far wide of the mark Mars in your estimate. 7/10 'could do better' would be my honest appraisal. ASHP: tidily installed wo...
@derek-m Hi Derek, the primary pump is the one in the ASHP, which for the Grant Aerona range is a fixed pump curve device. It's for exactly this reaso...
@derek-m, correct, the digital thermometers from Amazon Kev gave a link to. Nifty little things. Cost £11 or so on Amazon Prime for 4. The low loss he...
@kev-m Hi Kev, great minds. I've just fitted 4 of these to my newly installed system either side of the low loss header/volumiser, to read the primary...
@hughf The HIVE was by the installer, not Grant. It works for me as I can zone various rooms in the house on smart TRVs to boost temperatures to suit ...
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Degrees of Separation
Latest Posts
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
It can be done but really, really, don't, you will regr...
By JamesPa , 2 minutes ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
I think this calculation goes the other way. 3.54kW ga...
By JamesPa , 14 minutes ago
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RE: Cooling with air to water heat pumps
A quick update. I finally found a 'solar' roller bli...
By springswood , 2 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 16 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 16 hours ago
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RE: Questions about A2A for heating as well as cooling
@donciccio I would suggest that you take a "fabric-fi...
By Rob of York , 17 hours ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 1 day ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 2 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 3 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 4 days ago
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