Sat, 29 Aug 2026 07:41:24 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303467#Comment_303467 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303467#Comment_303467 Thu, 21 Sep 2023 20:49:35 +0100 tony
I said insulate the floor 150mm 100mm batts with 50mm EPS, and IWI 80mm PIR, draughtproofing, secondary glazing, insulate bay roof

What is the difference gas heated 7 days and 7 evenings 21C, night time 14C

Any guesstimates or do we need more info]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303482#Comment_303482 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303482#Comment_303482 Fri, 22 Sep 2023 11:41:32 +0100 bhommels I guess the answer expected is savings in £/year? Then let's put a price on comfort first.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303483#Comment_303483 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303483#Comment_303483 Fri, 22 Sep 2023 13:03:59 +0100 WillInAberdeen
If so Current heating
(13+6)X2.5 m² x 2U + 13x6m² x 2U + 13x6m² X 1U
x 2000 HDD X 24h/d / 3600
+20% for drafts

= 5000 kWh/y = £500/y


Proposed
(13+6)X2.5 m² x 0.5U + 13x6m² x 0.1U + 13x6m² X 0.2U
x 2000 HDD X 24h/d / 3600
+10% for ventilation

= 700 kWh = £70

Save £400/y

Biggest losses are the roof and floor

If there is a heated upstairs, then less.

Want better numbers, do a SAP.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303489#Comment_303489 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17967&Focus=303489#Comment_303489 Fri, 22 Sep 2023 21:35:01 +0100 tony
Thanks millions Will.]]>