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Last seen: Aug 19, 2026
@jeff The cost of an electric motor is pretty insignificant compared with cost of electricity it consumes in its operational lifetime. The cost of ins...
@jamespa I think you are right about a hotel type hot water feed. Hot water seems to return, see the secondary return shown in this section of dia...
@paullacey From the diagrams I assess you have 2 heat pumps plumbed in "tandem" but controlled in "cascade". What the second heat pump can do is the s...
@bontwoody "but after a minute the 3 way valved closed." I might be wrong but could it be a 3 port, 2 way valve with mid-position? Oper...
@grahamf To save wear and tear on the pump why could you not run weather comparison during the winter months only, and fixed temp. for the other month...
@jamespa Surely the problem will be grid undersupply i.e when the wind fails to blow just when you need it to! This is the problem that needs to ...
@jamespa or it might be related to the number of nuclear power stations closed over that time frame? Since 2008, five UK nuclear power stations have...
@jamespa had the closure of coal powered electricity generation had a part to play in general increase? Rapid Decline:Coal's share of the UK's elec...
@toodles, touché chez. /\
A question for Inspector Watson?
@guydeb I take it you've not explored the option of using a single phase to 3 phase converter to run a 18kW 3-phase heat pump. Instead of £44k on a gr...
@ecobaker I'm still thinking that something is triggering the valve to close. In cooling mode on the rad, what are you setting as the rad target tem...
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Degrees of Separation
Latest Posts
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RE: How Accurate Is My DIY Heat Loss Calculation?
@editor Thanks Mars, I have been enjoying playing with ...
By kilgorexv , 6 hours ago
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New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
I am feeling baffled and worried:We are having a an Aro...
By GutoFfowc , 8 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 , 11 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 11 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 , 12 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 , 2 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 , 2 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 , 3 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 6 days ago
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