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Last seen: Sep 22, 2026
To give yourself more confidence, look back over the past 3 years and work out the rolling average consumption over (eg) 3 hrs, 6hrs and 24hrs, for ea...
No your demand cant be 14.3kW. My annual gas usage is 18-20MWh and my measured consumption 7.5, max 8kW. Sadly this appears to be 'situation normal...
Most mcs contractors I have encountered refuse to take into account measured data, but there are exceptions. Oversized heat pumps can be inefficient....
Unfortunately sizing heat pumps for a retrofit is very far from a replicable process because the engineer must make assumptions about the fabric which...
Mitsubishi 11.2kW is within the pd size limits. Check LG and Panasonic also. Re nobody can get pp, is this for a heat pump or more generally. Yo...
I understand that A2A heat pumps have better turndown than A2W thus sizing is less critical. I haven't seen the proof that this is true however.
I don't think that ot is necessarily the case that you buy a HT pump for it's HT capability or that the expectation is to run a HT pump at ht. Manu...
It's questionable whether zoning saves money with a heat pump. The saving in lost energy is quite small, and because you need a higher ft as a result...
Thats precisely the same conclusion as I have reached. I have challenged MCS on the method they promote. Their response was that they are aware of...
My property is 200sq m. Two MCS surveys each taking 3hrs came out at 16kW. They ignored fabric upgrades I told them about and double counted room to...
As an example I checked the specs for the 6kW R32 (medium temp) and R290 (HT) Ecodans. They have the same claimed scop at 55C. Obviously there wil...
This is an interesting statement. It suggests your current total emitter capacity is well in excess of demand. So by switching on more emitters you ...
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Degrees of Separation
Latest Posts
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@editor firstly i want a heat pump but tbh you've put m...
By mrkfm , 10 minutes ago
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Cooling using an air to water heat pump
Is it possible to get cooling with a heat pump on a sta...
By mrkfm , 23 minutes ago
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RE: Passiv Smart Thermostat - Help & Forum Support
Hi @singlespeed That's fine we have installs where the ...
By Will H , 2 hours ago
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Analysis of the economics of switching to an A2W ASHP compared to other heat sources
This post aims to analyse the economics of installing, ...
By Rob of York , 3 hours ago
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RE: Why are ASHP installs so expensive?
Looking at it another way, do we think heat pump instal...
By scrchngwsl , 5 hours ago
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RE: Cooling with air to water heat pumps
@editor does that mean you have to have two separate ex...
By mrkfm , 18 hours ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
Posted by: @ian-s Could always use the money saved o...
By Rob of York , 23 hours ago
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Depends on what controls the pump! Thats the whole poi...
By JamesPa , 1 day ago
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The positive reviews keep coming in for Britain's Heat ...
By Mars , 2 days ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
I have one of these fitted which also allows you to reg...
By Old_Scientist , 2 days ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
If they can't don't give up. Heat pumps are, in reali...
By JamesPa , 3 days ago
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RE: Missing flow temperature in Heat Geek proposal
Yes that's what would happen by turning down the lsv to...
By JamesPa , 3 days ago
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RE: Grant R290 DHW Cycle Interuption
It looks like some sort of short pre-run. The question...
By JamesPa , 3 days ago
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RE: Cascade System or larger single unit
@renewables345 I would say if it a new build it’s no mo...
By Aventus Eco , 3 days ago
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