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AF1
@af1
Member
Active 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 ...

6 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...

6 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
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...

7 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 ...

11 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...

11 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.

11 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?

11 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?

11 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...

11 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Topic
RDSAP10 effect on existing heat pump EPC rating?
11 months ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Replies: 58
Views: 8204
Reply
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 ...

11 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.

11 months ago
Forum
Ground Source Heat Pump (GSHPs)
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