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Last seen: Oct 24, 2026
Propane (R290) sinks, under a window is allowed so far as I am aware.
At least they admit they may be wrong! My understanding is that they are concentrating on a specific subset of properties with a loss of 6 (8?)kW o...
I find increasingly staggering that the MCS rules don't require that the heat loss estimated by GIGO spreadsheet be compared with actual consumption, ...
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...
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Degrees of Separation
Latest Posts
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RE: New Build 3 Phase or 1Phase
Not so. 1: It's now the case that the Service Fuse wi...
By Transparent , 8 hours ago
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RE: How will removing the standing charge on gas bills benefit heat pumps?
I think it has an enormous impact on air/air users. The...
By EtchedPixels , 15 hours ago
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@editor Ouch, sorry to re start the tick. I had assume...
By DavidB , 1 day ago
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RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 1 day ago
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RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 2 days ago
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RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 3 days ago
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@transparent we’re still running a secure version of PH...
By Mars , 3 days ago
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RE: How quickly would you want/expect heat recovery to take from setback?
Much longer than that here. The heating isn't even on. ...
By bobflux , 4 days ago
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RE: Passiv Smart Thermostat - Help & Forum Support
Obviously the weather is changeable but there's a defin...
By Singlespeed , 4 days ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@rob-of-york I must admit that when we had a Daikin hea...
By Toodles , 4 days ago
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RE: Forum updates, announcements & issues
Get the Renewable Heating Hub heads-up on WhatsApp. I...
By Mars , 4 days ago
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RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
@editor I pointed out to the one of the Fuse execs that...
By dansus , 4 days ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews As well as loft insulation, there are othe...
By Rob of York , 4 days ago
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