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AF1
@af1
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Eminent Member
Joined: Mar 18, 2023
Last seen: Oct 27, 2025
Profile Activity
Topics: 2 / Replies: 13
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters

@jamespa When the installers left my property it had a paltry flow rare of 17l/min and constant fault codes. The label on the 12kw Panasonic ASHP ...

2 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

Another glaring problem with RDSAP10 is that assessors will not investigate; for example Cavity Wall Insulation, despite my offer to drill holes for h...

2 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
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RE: RDSAP10 effect on existing heat pump EPC rating?

@mike-patrick Hi, I found that the previous EPC assessor had used a very low "Default efficiency value" for our "poor" GSHP. I got in touch with Bosch...

2 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

@aaron There's the rub, the database does not list my HP, it appears to begin in 2016. So does this mean we cannot get a COP figure at all? /p> No ...

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

An improvement to a C rating from D appears to hinge upon how the efficiency of the GSHP is arrived at. The report I paid for for RHI gave an SPF of 4...

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

@aaron All features were in place for the last several EPCs which were D rated. I need C.

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

@aaron will it bring the rating up in a property with GSHP, MVHR, DG, Full loft insu and 100mm Phenolic EWI?

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

@aaron What is the cost of a full SAP and will it bring the rating up in a property with GSHP, MVHR, DG, Full loft insu and 100mm Phenolic EWI?

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: RDSAP10 effect on existing heat pump EPC rating?

@aaron Great response, thank you. Yes I already knew that Proof of all aspects is the key. I have everything regarding Glazing, GSHP, MVHR, EWI except...

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Topic
RDSAP10 effect on existing heat pump EPC rating?
6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Replies: 46
Views: 3298
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RE: Thinking of ripping our my IVT Greenline HT Plus C model and replacing with a gas boiler.

Hi, I have retrofit IVT GL C11 fitted in 2011 (Badly). We had to immediately rip out and replace all the pipework with much bigger diameter to up the ...

6 months ago
Forum
Ground Source Heat Pump (GSHPs)
Reply
RE: Thinking of ripping our my IVT Greenline HT Plus C model and replacing with a gas boiler.

6 months ago
Forum
Ground Source Heat Pump (GSHPs)
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