Last seen: Jun 10, 2025
@morganr Well you have certainly done due diligence 😁. I think its likely that your 4kw estimate is about right but a 6kw model shouldn't be g...
@morganr my understanding of the HG table is that it indicates how much heat can be delivered through that pipe size at a flow 0.9 mps. This is the st...
@morganr Hi. Welcome to the forum. I've used 15mm plastic to all my radiators and have calculated the correct power rates based on actual internal d...
So assuming 45p per liter and 7 kWh per liter thats about 19,000 kWh per year for heating. Does that match with your EPC, it should state it as mine d...
@rocky-a Hi Rocky. Welcome to the forum. Just to clarify, any house can be heated with a heat pump, despite some of the stories you might hear that...
@pooneil thanks for the feedback. Good to know it worked out in the end and Homely functions well.
@jamespa That was my feeling, but I have seen it argued that oversizing does not cause significant inefficiency, so I erred on the diplomatic side 🙂
@johnnyb I believe the jury is hung as to whether an oversized heat pump is actually less efficient. I think most people though agree excessive cyclin...
@johnnyb Using the immersion wont improve the efficiency but if you can get cheap rate electricity it should be no more expensive and may even be chea...
@jamespa That's interesting James. Two other things occurred to me after my last post.The first is that all DHW cylinders include an immersion heater ...
The point about needing a legionella cycle at all and how hot the water needs to be if you use one. Its an interesting point that if people cannot a...
@johnmo absolutely agree. However I've had conversations with heating engineers who categorically take a different opinion 🙃
Latest Posts
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RE: Flow Rate & Low Loss Headers
Well you have certainly done due diligence I've cer...
By MorganR , 4 minutes ago
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RE: Air Changes per Hour - ACH and the MCS requirement
@jamespa for the cheapest Its about £6500 +Vat, and £20...
By ASHP-BOBBA , 49 minutes ago
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RE: Say hello and introduce yourself
Welcome, @dgt_73. By the sound of it, there's quite a b...
By Majordennisbloodnok , 2 hours ago
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Thanks! That is most useful. I've had a look at the Mid...
By benson , 3 hours ago
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RE: Getting the best out of a heat pump - is Homely a possible answer?
I found that Homely blog a few days ago and was tempted...
By cathodeRay , 6 hours ago
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RE: I worry I've messed my Samsung settings up somehow
I had an issue like this last year, when my COP halved ...
By EcoBaker , 9 hours ago
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RE: Home energy storage & battery register
I love that! Unfortunately there doesn't appear curr...
By JamesPa , 1 day ago
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RE: Jokes and fun posts about heat pumps and renewables
Apocalypse Then So, yesterday evening I was watching ...
By Transparent , 1 day ago
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RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet Hi Melon, I would just concentrate on bala...
By ASHP-BOBBA , 2 days ago
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RE: All your heat pump problems solved by -- a plate heat exchanger in a plinth!
@allyfish As you say, all the ‘plus points’ and ‘advant...
By Toodles , 4 days ago
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RE: Renewable Heating Hub Homeowners' Q&A Podcast
In our latest episode, we hand the mic to four homeowne...
By Mars , 6 days ago
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RE: Forum updates, announcements & issues
@andrewj I’m currently away and only back this weekend....
By Mars , 6 days ago
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RE: Help Stop the MCS Heat Pump Monopoly
Response sent. Thank you for highlighting the document...
By Sheriff Fatman , 6 days ago
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RE: Feasible solutions to expand existing Sunsynk battery capacity
Ours is a loft installation, which is where both invert...
By Sheriff Fatman , 6 days ago
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RE: 5 Star Service from Havenwise
@sheriff-fatman Exactly this is why a lot of our users ...
By HCas , 1 week ago
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RE: Solar Thermal DHW and ASHP
I'm beginning to think solar thermal is something that ...
By Alex_N , 1 week ago
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RE: Commencing on an ASHP Installation Process
I received the BUS Grant permission email yesterday eve...
By Sheriff Fatman , 1 week ago
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RE: Solar Power Output – Let’s Compare Generation Figures
510kWh of solar PV from my 4kW Hyundai panels and SMA S...
By JulianC , 1 week ago
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RE: Is my Samsung heat pump working too well?
Thats in itself is interesting. I have a Vaillant heat...
By JamesPa , 1 week ago
