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Last seen: Apr 8, 2025
1970's 4 bed detached house with loft and cavity insulation in central southern England heated by a 7kW Vaillant Arotherm+. 508kWh used in January acc...
This situation provides a good example of the challenges of retro-fitting heat pumps to existing housing. Is there a technical reason for not fitting ...
Would bigger emitters compensate for the lower water temperature in the cooler rooms? Something extra in the living room might be sufficient as some h...
1. Are all your radiator valves (both any thermostatic valves and the lockshield valves) fully open? 2. What diameter is your pipework to the radiat...
Here's a couple of thermal images of my cylinder and pipework which have turned what was the coldest room in the house (NE corner) into the warmest de...
I caught my Arotherm+ heat pump at the end of a defrost cycle this morning when the OAT was about 0C. I then checked the data provided by the Vaillant...
I probably fit into the Eco-tech savvy group with the heat pump investment helped by the current government support. However, as a retired engineer, I...
It seems to be normal practice to put the filter on the return pipe to the heat pump so it catches any debris from the main heating system before it g...
I've just been and checked: My 28mm pipework includes a 22mm mag filter (with isolator valves) and works fine. Think of it as a short section of singl...
That looks to me to be a sound approach: Use the bigger pipe size to where the flow splits to the two heating circuits.
Less friction means less effort by the pump. The primary circuit for my 7kW Arotherm+ heat pump uses 28mm pipe and is running happily. The extra volum...
The hydraulic friction losses are in proportion to the square of the flow velocity x length. For example the friction loss of a given flow through 22m...
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Degrees of Separation
Latest Posts
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RE: Next steps on my ASHP journey: Radiators and Pipework
If you are considering phasing the project, then I woul...
By GrahamF , 2 hours ago
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RE: Siting of the external sensor on a heatpump
Of course had the heat source been a heat pump it would...
By JamesPa , 4 hours ago
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Never assume, it makes an ass of u and me! OK, tha...
By JamesPa , 5 hours ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
In fairness all heating has cost a lot to run in recent...
By JamesPa , 7 hours ago
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RE: Is it the house or the equipment?
@springswood We have two Daikin single split A2A syst...
By Rob of York , 8 hours ago
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 1 day ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 2 days ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
By bobflux , 2 days ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
By cathodeRay , 2 days ago
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RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
By AdamK , 2 days ago
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RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
By JamesPa , 3 days ago
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RE: Two heating zones to one zone
@transparent Many thanks. The garage is fairly well ...
By Profzarkov , 3 days ago
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RE: Vaillant Aurotherm - Heater Wire Position
Ah, good point. I need to check if this was installed i...
By Batpred , 4 days ago
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@batpred thanks for getting a copy. Appreciate the supp...
By Mars , 4 days ago
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