Green Building Forum - My SAP Assessment - should I be concerned Wed, 09 Sep 2026 17:53:08 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 My SAP Assessment - should I be concerned https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153073#Comment_153073 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153073#Comment_153073 Thu, 02 Aug 2012 10:43:15 +0100 Pugliese
Should I be concerned that there are apparent errors like 6 x air changes when it should be 0.6 or the fact that it will all come out in the post build SAP, shall I just move on.

It has been mentioned on this forum that as a tool for assessing our heating needs it is not much good, so I am wondering if analysing it all and picking up all the errors is really worth it.

Also is there a list anywhere of target values for CO2 emissions, fabric heat loss and Space heating requirement per m² (kWh/m²/year)? It would be nice to understand how the house compares to the norm.]]> My SAP Assessment - should I be concerned https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153075#Comment_153075 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153075#Comment_153075 Thu, 02 Aug 2012 11:19:25 +0100 Ed Davies Posted By: PuglieseShould I be concerned that there are apparent errors like 6 x air changes when it should be 0.6
Any possibility that's due to confusion between target 50 Pa (blower-door test) and “in operation” rates?]]> My SAP Assessment - should I be concerned https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153077#Comment_153077 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153077#Comment_153077 Thu, 02 Aug 2012 11:54:04 +0100 Pugliese Posted By: Ed Davies
Posted By: PuglieseShould I be concerned that there are apparent errors like 6 x air changes when it should be 0.6

Any possibility that's due to confusion between target 50 Pa (blower-door test) and “in operation” rates?

No, just spoken to the assessor and they decided that 0.6 was very hard to achieve and by putting in 6 the house was still fully compliant, so gave us 'wriggle room' on the final SAP - I suppose it is a bit of forward thinking but they could have told me!]]> My SAP Assessment - should I be concerned https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153099#Comment_153099 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=9407&Focus=153099#Comment_153099 Thu, 02 Aug 2012 20:54:38 +0100 Timber
0.6m3/m2/hr @ 50pa would be quite hard to achieve unless you are super anal about detailing and on-site build quality. A SAP target of 2 or 3 might be better for design purposes, and aim to beat in the final test.

BUT this is all from memory, so someone might correct me on this.]]>