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Last seen: May 29, 2025
Well said, Sir! I have been trying to get this point across to reluctant ears. SCOP measures the efficiency of energy use during ACTIVE heat pump peri...
@johnmo Agree entirely.
@johnmo Agreed on size of buffer tank. They also say that the flow of secondary pump must be higher than primary, therefore they are proposing a kind...
@damon Whilst we are waxing lyrical about Viessmann as a pinnacle of heat pump system design, attached is an extract from their manual. They state tha...
Really. This is a rather sweeping generalisation. This may be valid in an old house with 2 sqm window and radiator, but different issues apply in a mo...
@harryrea I agree entirely with the concept of zoning for practical purposes, especially for control of comfort. For example, I have a log burner in ...
This could be mitigated by putting a one way check valve on the top input so that flow is only downwards. Can't think of any detrimental effects.
Apologies. Poor choice of words. Delete "dilution of temperature to emitters is minimised".
Only the difference in flow between the heat pump and the emitters passes through the tank. This lower flow helps to preserve the stratification of th...
Note a key point here though. The primary pump is connected in the return pipe while the secondary pump is connected in the flow pipe after the buffer...
@potatoman No, the installation is exactly the same as a 4 port buffer with primary and secondary pumps except that the output flow bypasses the top ...
@ashp-bobba I am afraid that you are talking to the wrong person about manufacturers preferences. However, as far as I can see, it functions the same...
Latest Posts
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RE: Estimating true heat loss from twelve months of consumption data
@ian33a — a measured heat loss always trumps a calculat...
By cathodeRay , 3 minutes ago
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RE: Setback savings - fact or fiction?
Yes, see below. They are just standard regression lines...
By cathodeRay , 30 minutes ago
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RE: Grant Aeona 3 R32 cycling with weather compensation.
The hot water heating looks normal. The heat transfer ...
By GrahamF , 2 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
Good questions @temperature_gradient. My understanding ...
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RE: Anyone concerned about GivEnergy?
@sunnyskies I agree with Downfield trying to ask the GE...
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
All going according to plan, mid July we get that 7kW a...
By Batpred , 15 hours ago
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Current metrics - DHW target set to 47c
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RE: My Grant R290 9kW Heat Pump Installation
@petch I'm very sorry that I have not picked up your po...
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Suggest you have a trial with Havenwise app. I have th...
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RE: New Solar, Batteries, Air Source and Under Floor Heating advice please
You’re right: UFH works best with high-conductivity fin...
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RE: DIY or Don’t Touch? Solarman Smart Meter Install
That was my understanding also.
By JamesPa , 1 day ago
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RE: Vaillant Sensocomfort Time
Oh I remember this from when I set mine up 2 years ago,...
By JamesPa , 2 days ago
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Heat geek have already stated that the pro is in fact c...
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RE: The Myth of the MCS Performance Guarantee
@editor I know. As if MCS wasn't bad enough, it's now e...
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