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JohnR
@johnr
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Estimable Member
Joined: Nov 25, 2024
Last seen: Apr 8, 2025
Profile Activity
Topics: 0 / Replies: 106
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RE: To relocate or add extra PV panels..advice required

You can't forecast the annual generation by simple extrapolation from the winter six months. I have a winter tree shading problem (some of the trees a...

10 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Are MCS are finally improving (some of) their guidelines?

Encouragement of installers to take account of the emitters must be a good thing. It might make it more difficult for the likes of Octopus to get away...

10 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?

The flow doesn't get reversed but just keeps circulating without being heated at the heat pump. Consequently there's a drop in flow temperature as the...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Heat Pump Sizing & Installation Costs

1970s 4-bed detached house approx 168 sq.m internal area in central southern England. Approx 200mm of roof insulation, insulated cavity walls, fairly ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie: utterly confused with my Mitsubishi Zubadan air source heat pump running on 55C set flow temperature

How many pipes go in/out of those tanks? Buffer tanks normally have four pipes but if there's only one pipe per tank then they are expansion tanks, he...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Further to the above I have just made some observations during a defrost cycle. My Arotherm+ kept the secondary (radiator) circuit pump running so the...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

I should add that my system has two circulating pumps: One in the heat pump which circulates water to the buffer tank and DHW cylinder and one in the ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Transforming a Derbyshire Property into an Energy-Efficient Haven

I agree with the cost of servicing being a major disincentive for the heat pump purchase. I had hoped that investing in a heat pump and associated rad...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

I've got a 7kW Arotherm+ with 50 L buffer tank (so no immediate slug of cold water going to the radiators) and see the recovery from defrosting as onl...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump

The condensation demonstrates that the curtains are very effective so the window gets cold. My bedroom has a fairly big (2.4m x 1.2m) north-facing win...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump

Curtains and the loss through the window is what I was thinking about overnight. I've got a 3m wide and two storey high north facing window in my hall...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump

I have to wonder if the cold lounge needs a much bigger, or additional, radiator to get sufficient heat output from water which is cooler than what th...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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