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

That's correct. You probably will need to measure flow rate though, spec sheet will likely just be a pump curve.

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

So heating pipes go from 22 copper to 22 plastic to 28 copper? What a lazy sod of a plumber who fitted the heat pump Would it be practical to replac...

2 years ago
Reply
RE: ASHP & Radiator Sizing - Measuring Heat Loss

Thats definitely a reasonable suspicion. The initial results fom my heat pump suggest my condensing boiler (which was operated at FT50/55 so should b...

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

With your insulation upgrades its quite possible that you may be able to dispense with the buffer without changing the pipework. Can you clarify the ...

2 years ago
Reply
RE: Looking for some advice – no viable installer/system – I'm stuck

Wow, thats a lot of gas - you said 120 sq m is that the total floor area or just the ground floor footprint? For comparison my 200sq m detached was a...

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

If you were willing to supply more info I could probably give you a good idea if just scrapping the buffer will work. How old is the installat...

2 years ago
Reply
RE: Looking for some advice – no viable installer/system – I'm stuck

He is correct this is written into the BUS rules. Just to get a feel for what you need in terms of capacity: Whats your annual gas consumption, h...

2 years ago
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RE: Looking for some advice – no viable installer/system – I'm stuck

I wouldn't give up. You presumably have cavity walls which either are, or could be, insulated and either double glazing or the potential to fit it. ...

2 years ago
Reply
RE: ASHP & Radiator Sizing - Measuring Heat Loss

Firstly, your method may well work, Im jolly impressed and please continue to post to inform us all! In response to your comment above a) I ob...

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

OK. 16kW is not compatible with 22mm pipework, and barely compatible with 28mm at a typical design DT across the radiators of 5C/p> That said 16kW...

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

If you remove the buffer you will also need to remove the secondary pump. Re your concern, it depends. Some further detail will help determine. ...

2 years ago
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