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Last seen: Oct 23, 2026
@jamespa One reason is that the Arotherm Pro is currently awaiting inclusion in the ENA database (so not marked as "connect and notify"). This appr...
@annab Regarding the brands, the ones you mention are very common. Mitsubishi make R32 and also the newer R290 models, Vaillant Arotherm are all R2...
@jamespa It seems the Arotherm pro VWL 75/7.1 A 230V complies with IEC 61000-3-12 , exactly the same standard as the Arotherm Plus and the same lim...
@majordennisbloodnok We have a sort of inflatable rubber with a pipe, so there’s enough airflow to keep it dry…
We still have a gas fire for backup. The last gas engineers that visited got a bit excited when they noticed the rubber protruding and blocking the ch...
We had a discussion elsewhere about protection devices and specifically the type of RCDs required by some heatpumps. Vaillant specifically collaborate...
Not having a breakdown was not a problem in itself. The challenge was when we looked for different locations for the install, types of cylinders or nu...
I ran a quick check using This is what it says: Based on 14,313 kWh gas annually, the implied heat loss range is 4.8-7.2 kW. Your estimate of 9 k...
Absolutely no issues, I find it very useful. It seems I helped to derail the thread from the Helium future.. Not at all, thank you for the e...
@majordennisbloodnok @jamespa I stand corrected, A2A need defrost cycles just like A2W! 🙂 But on the relative efficiency, given that the...
@majordennisbloodnok I just noticed that A2A manufacturers tend to quote higher efficiencies than A2W. In practice the fact they inherently have no...
That is a good point, a manufacturers can stop trading, more often the distributor or installer. It is certainly useful to be able to extend the life ...
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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 , 5 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 , 12 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 , 3 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 , 3 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 , 3 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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