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Last seen: Aug 16, 2026
@giryan Im with James in that the heat loss is very high and you need to do anything you can to get that down. Internal wall insulation would be so...
Well done on sorting out the insulation first Matt. Is the heat loss figure before or after all your proposed changes?
Its what ive used. I know some people choose ones which dont constrict the pipework too much but mine are just honeywell.
@polar-bear So from your diagram I see that you are using the same temperature water for the UFH and radiators? That may be problematic with regards r...
@davidalgarve Im only just beginning to scratch the surface David but it seems that there are some energy saving features in Melpump although maybe no...
@pollar-bear Top job, I installed my own too and even though it is basic plumbing skills, There was always the nagging doubt "what if I f*** this up a...
I have now managed to tweak a few DIP switches to get all the required data through now and I have to say Im really impressed with the dongle (Mitsubi...
@old_scientist I dont monitor the tank temperature but inferring from the flow temp I think the ASHP can heat to around 50-60C. That water is probably...
So after playing about with DHW settings for a while I think the optimum use of the coil is for about 30 mins. After that time the COP drops to a poin...
@majordennisbloodnok Good explanation I thought 😁
@davidalgarve Unfortunately not as I didnt install Melcloud, the dongle doesnt need it. Hopefully Philip will be able to help when he joins the discus...
@davidalgarve The dongle I bought allows the standard Mitsu adapter to plug into it so you can have both. Ive copied in the chap I bought it off so ho...
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Latest Posts
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RE: How Accurate Is My DIY Heat Loss Calculation?
Any idea how efficient your gas boiler is? Is it a 50 y...
By Old_Scientist , 3 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 , 15 hours 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 , 1 day 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 , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
By JamesPa , 2 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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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 6 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 6 days ago
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