Last seen: Nov 12, 2023
I would see it like this: Before anything else, don't constrain yourself with just one point 9kW, there is a range from 6kW to 11kW that is close to...
As the flow temperature is degreased, the mean radiator temperature degreases, thus there is less heat transfer from the radiator to the air. As you c...
@jamespa if you are chasing the efficiency of on versus off running temperatures at the lowest output, then you better not have the radiators sized fo...
So that def means the WC should go lower flow temp at 15C outside, you can do that.
no, sorry, random internet guy
I hope you don't mind I've just used your newly installed system as an example whilst you were posting your own post. Initially I did question why y...
My opinion is that oversizing is not a problem until you let the heat pump run in weather compensation/automatically when the load is bellow minimum. ...
@jamespa I hope you will eventually get your own toy to play with in real time, so you can come to a conclusion based on facts rather than virtual dat...
a flock of sheep stacked around the house? any related clothing? wool knitted underwear is bliss
“Our heat pumps are also fitted with hydrophilic coated coils as standard which enable a more efficient defrost cycle as they prevent a large build up...
10% could be a real ballpark
2000 joules/m3 air/degree C
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Latest Posts
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@jamespa Agreed. I think it’s a case of much over muchn...
By Mars , 38 minutes ago
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@eliuccio Unfortunately, whilst I agree with a lot of...
By JamesPa , 1 hour ago
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RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump
@bami I think if the heat loss documentation matches a ...
By bontwoody , 1 hour ago
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RE: What is the best strategy for operating a very oversized heat pump?
@jamespa I'm afraid that's over my head but if anyon...
By IRMartini , 2 hours ago
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RE: Setback savings - fact or fiction?
And here in case any one wants it is the code I used in...
By cathodeRay , 2 hours ago
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RE: Samsung Gen 7 R290 12kW is not behaving how I expected
Definitely its in the 20xx FSVs. Conversely it may be...
By JamesPa , 2 hours ago
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RE: Towel rails. An unexpected final hurdle
We have both Normal Rad for heating the room and then a...
By IRMartini , 4 hours ago
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RE: Heat Pump Sizing & Installation Costs
Perhaps useful to have installed date too? To get conte...
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RE: SolarPV tables / online calculator
I'd be interested what others find whilst using that we...
By Majordennisbloodnok , 8 hours ago
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RE: F.788 Building circuit pump reports internal fault - Vaillant Arotherm
Guess I have to wait for engineer visit. I really hope ...
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RE: Act now to defer the UK road tax increase on EVs
@majordennisbloodnok Damn right sir. my attempt at iron...
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RE: ASHP and heating issues in new build house
That’s good gives you more capacity. It made me think, ...
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RE: Seewet manhole cover within r290 exclusion zone
Thanks! I asked Vaillant, and they say I should be fi...
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Looking for the Grant Aerona 3 setting to turn off completely at 20 OAT
I'm running my Aerona 3 on WC and the 'warm end of that...
By damonc , 1 day ago
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RE: Do I just go with the lowest quote for my heat pump?
So after signing in Sept in two weeks the install may s...
By Jancold , 1 day ago
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RE: Victorian Semi Retrofit / Extension ASHP and UFH Advice
When you are renovating is always a good time, as it ma...
By JamesPa , 1 day ago
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RE: Just one room not reaching desired temperature
Looks like this issue is now resolved. Aira installed a...
By ChandyKris , 1 day ago
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There have been several people on the OpenEnergyMonitor...
By RobS , 2 days ago
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RE: Say hello and introduce yourself
Good point @jamespa But that probably strengthens @ch...
By Transparent , 2 days ago
Latest Topics
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Heat Pump Sizing & Installation Costs
By Mars 8 hours ago
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Volumisers in Heat Pump Systems: Does Placement Matter?
By Mars 9 hours ago
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SolarPV tables / online calculator
By MichelleC 16 hours ago
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By Toodles 2 days ago