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Last seen: May 17, 2026
@swwils there is no logic to oversizing a heat pump. It wastes energy keeping a large compressor and heat exchanger running. you got the 9kW cosy as...
@andrewj i refused a daikin 8kW as it was over powered for the heat loss calcs I did their calcs were 20% higher until I challenged them to redo the...
@chandykris ive mentioned previously i researched heat pumps for over a year, reading mars’ forum extensively. I learnt R290 was the new gas, which id...
@chandykris In the winter period, i boost the temp during the 8 cosy hours by 0.5C, and the 4-7p period drop it by 0.5C This gave me 85%+ usage o...
@andrewj got an astounding COP over 6 today Has Octopus changed something on my Cosy6
@harrisonc sound meter App is available for iphone, I have one called NIOSH SLM
Maybe you can email Greg and ask him to come on a pod cast of yours and talk about Hush Mode and if it’s available for Cosy6,9,12 He's always doing ...
@jamespa having a battery the day rate tariff becomes the nighttime one I'm currently at 98% usage at night time rate with a 5kW battery. I looked a...
@majordennisbloodnok i was ferkling in the growatt App as i recalled i altered the inverter time differently last change, and eventually found the ...
I have a Cosy6, it draws 1.6kWh on DHW cycle, your Ecodan is taking allot of power, using your figures its COP 2 I trialled DHW cycle during my cosy...
had an interesting day, i exported more than the PV was generating, and not from the battery which is snoozing for the sumner &nbs...
@majordennisbloodnok i dont, i was looking at doing it, but im in middle of renovations and need to build the new staircase and batton snd insulate al...
Latest Posts
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RE: Heat Pump Manufacturers Recommending Buffer Tanks
@tony-stolz, I think @jamespa has already covered the h...
By Mars , 9 hours ago
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RE: Heat Pump Overpromising – What Were You Actually Told Before You Bought?
@jamespa that’s actually a really interesting observati...
By Mars , 9 hours ago
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RE: How many people are happy with their ASHP and do you believe them?
Good luck, I spent a couple of hours and, whilst I foun...
By JamesPa , 10 hours ago
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RE: Heat Pump Operation in Summer - Valliant 7kW
I do the same: cool my large buffer (3000L) to 10C, pum...
By upnorthandpersonal , 18 hours ago
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@editor "The interesting bit is that many modern invert...
By Singlespeed , 18 hours ago
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RE: Ecodan & MelCloud scheduling
With the prospect of warmer weather this week, I brough...
By downfield , 20 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I reached out to MCS directly last week on this and her...
By Mars , 20 hours ago
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Mentally you have to separate the ac side and the DC si...
By JamesPa , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 2 days ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@l2jad I was just thinking all things being equal. Our ...
By AndrewJ , 2 days ago
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Hi, Does anybody have experience with Heat Geek insta...
By sttpd1917 , 2 days ago
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I will soon be struggling. Admittedly it is the summer,...
By Batpred , 3 days ago
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RE: Indevolt Batteries UK Support & Info Thread
Not known yet. I've asked a local Councillor to follo...
By Transparent , 3 days ago
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Hard to tell but I think I have placed the arrow on wha...
By ASHP-BOBBA , 4 days ago
