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JamesPa
JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 18, 2026
Topics: 27 / Replies: 5258
Reply
RE: ASHP & Radiator Sizing - Measuring Heat Loss

What is your concern triggering the question. I am impressed at trying to determine individual rooms, I was content to determine whole house by meas...

2 years ago
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RE: Octopus design temperatures confusion

No to the first. You can reduce the temperature of the other rooms by adjusting the lockshield valves. You have to do this anyway because radiators ...

2 years ago
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Thanks Sadly with a 60cm high tank I think the chances of maintaining stratification (IE a temperature gradient from top to bottom, which is wha...

2 years ago
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RE: Octopus design temperatures confusion

Not exactly. Type 11 = 1 panel, set of fins, type 21 = 2 panels 1 set of fins, type 22 = 2 panels 2 sets of fins. Unfortunately SC could be 11 or 2...

2 years ago
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RE: Octopus design temperatures confusion

I suspect 60dc120 means 60cm high 120cm long double convector. SC single convector. Heat loss same so good, only issue seems to be rad size/flow te...

2 years ago
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RE: Octopus design temperatures confusion

The temperatures you quote are the standard mcs minimum design temperatures. The MCS and grant rules allow them to be raised but not reduced. Try pu...

2 years ago
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Sorry I didn't spot the pictures above. Buffer tank looks very squat (which would explain lots). How high is it and what is the vertical distan...

2 years ago
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RE: Vaillant arotherm plus heat pump frost protection

@kentuk It occurs to me, have you got a timed heating schedule and if so what is it. Can you tell me why the indoor temperature was so low in the ...

2 years ago
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RE: Winter climatic curves v Spring/Autumn climatic curves

Very sensible (you, not your installer). I suggest (if you haven't already) you set any TRVs to well above the desired temperature and any thermost...

2 years ago
Reply
RE: Vaillant arotherm plus heat pump frost protection

Im sorry but I really don't understand from what you have said how you are running your heat pump (for example how can WC work when the outdoor sensor...

2 years ago
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