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Last seen: Jan 8, 2025
My MCS calculation spreadsheet shows a COP of 3.3, which claims to be the 'manufacturers SCOP' I don't know where they got the number from. The MCS ...
Great information @Prunus.
@phil-i, you are essentially asking, "should I get a free heat pump now or wait a bit longer and pay for it". Although Grant ASHPs seem to be less...
Yes 😉 The rated kW figure is delivered energy under nominal conditions. Most ASHPs will be able to deliver a bit more and in extreme conditions ma...
I think the scale needed to make it worthwhile is huge. It's not so much the water, it's where you pump it to. If you look at hydro or pumped storag...
@duncan-mac if your max heat loss is 8kW and you have a 7kW ASHP, what happens when it's really cold? Can the ASHP keep up?
This sort of thing goes a long way to explain it. Unfortunately a lot of people read this sort of stuff.
That's exactly what I was thinking. Factor in even 90% efficiency for gas and it's even closer. We just need the installation costs to come down a b...
I'm not so sure. Anyone installing heat pumps should know how they work. If they do, they will know an ASHP running at 50C with 3rd party thermostat...
@RV3 that looks good to me. I assume you have the heating on 24/7 as that's a very high % of heating. I'm about 65% but I have the heating off 12-5am...
It's a high standing charge but I'd be tempted by that. I wonder if it's anything to do with the latest subsidies just appearing in the news?
@riponowl the other thing I meant to say was that some of the ups and downs might be because of DHW. The flow temp seems to shoot up to 55 or so a ...
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RE: Mitsubishi ecodan settings
Ah, I should have been clear, I do not mean flow temp b...
By Batpred , 10 minutes ago
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RE: Mitsubishi Ecodan not good enough ?
We are considering an Ecodan R290 ASHP, they seem to be...
By Batpred , 14 minutes ago
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RE: Mitsubishi Ecodan FTC6, Evohome & Economy 7. Getting Two Zones to Work Together
This is what we are trying to avoid if we go Ecodan, mu...
By Batpred , 23 minutes ago
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RE: Indevolt Batteries UK Support & Info Thread
Indeed. Without that, it is just loose marketing.. &...
By Batpred , 28 minutes ago
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Great points, I agree it is overused. It is also a grea...
By Batpred , 32 minutes ago
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RE: GSHP Kaput After 16 Years: New Compressor or Switch to ASHP? Advice Welcome
On old (non inverter) compressors there’s sometimes a ‘...
By robl , 17 hours ago
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RE: Brown Oily Residue Blocking Air Vent and Weeping Relief Valve... Anyone Seen This?
I'll take a photo of it if and when I next encounter it...
By seoras , 19 hours ago
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RE: Heat Pump Pipe Sizing Question
@trebor12345rebor12345 I got the circulator curves from...
By bobflux , 23 hours ago
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RE: Jokes and fun posts about heat pumps and renewables
That particular Tracking system gets updated as soon as...
By Transparent , 1 day ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@editor It's available here -
By HarrisonC , 2 days ago
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@painter26 i am in Lightwater and midea trained. Sounds...
By Wizard , 2 days ago
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RE: Renewables & Heat Pumps in the News
@jamespa, for all I know they did have the coupling and...
By Mars , 2 days ago
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@andrewj ... well, clearing gutters is a worthwhile ann...
By colinc , 2 days ago
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RE: Anyone concerned about GivEnergy?
Here is the latest communication from GivEnergy regardi...
By txmartyn , 2 days ago
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@editor I too had a long list of questions, some of ...
By Bash , 2 days ago
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RE: Tell us about your Solar (PV) setup
3.84kWp of solar on our main South-East facing roof, in...
By Gmuzz , 2 days ago
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RE: Vaillant arotherm plus heat pump frost protection
Yes, typically as close to the heat pump as possible. ...
By JamesPa , 2 days ago
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RE: Our 10 year old Grant heat pump failed
Back in the 70’s and through the eighties, one of my re...
By Toodles , 3 days ago
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RE: Share Your Experiences with Heat Pump Manufacturer Support
@seoras Sorry to hear that. I found Vaillant very help...
By JamesPa , 4 days ago
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The Watchdog That Watched and Waited
On 9 January 2026, Consumer Energy Solutions collapsed ...
By Mars , 4 days ago
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RE: Valliant Heat Pump Settings
Thats arguably a sign of a good installer - they unders...
By JamesPa , 4 days ago
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RE: Electricity price predictions
Well, we have so many cases where rain water mixes with...
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RE: Two heating zones to one zone
@profzarkov They arent obviously wrong, but the only...
By JamesPa , 4 days ago


