Fri, 07 Aug 2026 20:12:27 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260417#Comment_260417 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260417#Comment_260417 Fri, 11 Aug 2017 14:41:33 +0100 nigel
Energy Costs per annum are Pellets £550 Briquettes for stove £200 Electricity £400 and I have a plug in hybrid on the electricity.

The EPC says it will cost £3000 per annum just to heat my house. Its only wrong by a factor of 3.

Most people take absolutely no notice of the EPC, not because its inaccurate but because they don't think its important.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260419#Comment_260419 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260419#Comment_260419 Fri, 11 Aug 2017 16:05:15 +0100 ferdinand2000 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260421#Comment_260421 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260421#Comment_260421 Fri, 11 Aug 2017 17:27:09 +0100 gravelld Posted By: nigelThe EPC says it will cost £3000 per annum just to heat my house. Its only wrong by a factor of 3.
LOL. Interesting, because according to the AECB (https://www.aecb.net/wp-content/uploads/2013/02/Combined_PHPP_SAP_FINAL.pdf) they found SAP often underestimated the space heating requirement for low energy houses - PHPP giving something more accurate.

Ah - but in your case was the EPC derived from a visit and assumed values? Guess they won't count the EWI because the people who installed it were wearing the wrong badge?

Wonder what @djh has found?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260423#Comment_260423 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260423#Comment_260423 Fri, 11 Aug 2017 18:10:58 +0100 nigel
The assessor was observed standing on a ladder holding open the loft hatch, ipad in hand photographing the loft insulation whilst as the same time holding a tape measure to prove that the stated level of insulation was installed.

The floor area they came up with was about 2/3rds of the actual so the whole thing was worryingly inaccurate.

Part of the problem was also down to the boiler not being on the right list so was treated as being 65% efficient.

The whole thing is so random as not be worth bothering with unless you have to meet a certain score for a reason.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260424#Comment_260424 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260424#Comment_260424 Fri, 11 Aug 2017 18:45:15 +0100 Mackers https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260429#Comment_260429 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260429#Comment_260429 Sat, 12 Aug 2017 07:56:19 +0100 PeterStarck Posted By: gravelld SAP often underestimated the space heating requirement for low energy houses - PHPP giving something more accurate.

I found that to be the case also. My SAP estimated 8kWh/m2/year and PHPP estimated 11kWh/m2/year.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260433#Comment_260433 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260433#Comment_260433 Sat, 12 Aug 2017 12:37:50 +0100 djh https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260560#Comment_260560 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=15216&Focus=260560#Comment_260560 Thu, 17 Aug 2017 13:04:25 +0100 Mike George
http://www.harryharper.co.uk/property/?ref=00001571]]>