Last seen: May 29, 2025
@ubert767 File is attached. My explanation may be a bit unclear. My HP only turns off when all stats turn off, otherwise the flow modulates above ...
@ubert767 You have a UFH system and house size similar to mine except I have a Samsung Gen 4 Split 4kW. You were wise and chose a split system which i...
@sunandair This new Ecodan validates your argument about following WC closely for maximum efficiency. You can now set your design flow and radiator si...
@jamespa Quoted performance figures @35C flow, -7C OAT = 8.2kW and @25C flow, 15C OAT = 2.1kW. Quite something. Other output models as well.
@jamespa I agree. That is where the design choices come in. You have to design within the constraints imposed on you, realistic or not.
@jamespa It is all about design choices. In my view heating at extreme low end temperatures is a small minority of overall heating which might not eve...
@sunandair Posted by: @sunandair "If the weather curve is set correctly then the house envelope will never reach the set temperature and therefor...
@sunandair I think I understand what you are getting at with “widest range”. This is not an easy dilemma. You are right about radiator over-size at 15...
@sunandair Regarding radiators, UFH and WC, system design can have some quirks. Say one designs for the following:i) -3C design temperature with a mat...
@uk_pete_2000 I am now totally confused how your minimum output 6kW heat pump is coping with <3kW load without serious cycling, but never mind. R...
@uk_pete_2000 In the light of this discussion, could you maybe share what is happening on your system as you have a 13kW heat pump in a low-loss passi...
@uk_pete_2000 Your u-values stack up with the amount of insulation installed. I presume therefore that you also have MVHR. As the peak heat load is wa...
Latest Posts
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RE: Commencing on an ASHP Installation Process
@sheriff-fatman Thank you for a very detailed review of...
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I believe there's another reason that network upgrades ...
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RE: Why Your MCS-Certified Installer Might Not Be As Competent As You Think
I'm more than happy to try to help. Are you op...
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RE: What’s the modern take on advised types of insulation?
@jeff I am sorry @jeff if I have misunderstood what you...
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RE: 5 Star Service from Havenwise
@sheriff-fatman Good post. I am also considering Hav...
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RE: Getting the best out of a heat pump - is Homely a possible answer?
@editor Cobbler’s Mantra that!
By Toodles , 19 hours ago
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RE: Radiators downstairs are cooler at the bottom after ASHP install
@melonbuffet This is great assuming now the down stairs...
By ASHP-BOBBA , 2 days ago
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RE: Renewables & Heat Pumps in the News
Australia Blue, the first wind farm in Western Victoria...
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RE: Flow rate discrepancy between ASHP and manifold
That's useful thanks, I hadn't seen that table before. ...
By AshRolls , 2 days ago
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In principle I agree, @johnmo, but with provisos. The...
By Majordennisbloodnok , 3 days ago
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RE: Heat pump installation and BUS Grant timings
@jamespa Thats how I understood it too. 🙂
By ASHP-BOBBA , 3 days ago
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RE: Antifreeze top up for my heat pump - is this a rip off?
@sallyl That sounds about right if they are re-filling ...
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RE: Enabling WiFi: Samsung ASHP on Smart Things App
I would switch it off and see if anyone noticed. We use...
By Anonymous 5011 , 3 days ago
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I wouldn't be so sure about that. Heat pump designers ...
By JamesPa , 3 days ago
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RE: Jokes and fun posts about heat pumps and renewables
@toodles they're a rowdy bunch!
By Mars , 4 days ago
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RE: Home energy storage & battery register
@jamespa To a certain extent, by exporting to the grid ...
By Toodles , 4 days ago
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RE: Forum updates, announcements & issues
@editor Fairy Nuff Mars, I doubt that my ramblings woul...
By Toodles , 6 days ago
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RE: Confusion about heat pump sizing
We’ve published a deep dive into heat pump sizing, and ...
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We’ve published a deep dive into heat pump sizing, and ...
By Mars , 6 days ago
