Mon, 15 Jun 2026 00:15:35 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3579#Comment_3579 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3579#Comment_3579 Thu, 31 May 2007 21:58:35 +0100 Jeff B https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3584#Comment_3584 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3584#Comment_3584 Thu, 31 May 2007 23:25:16 +0100 Nick Parsons https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3585#Comment_3585 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3585#Comment_3585 Fri, 01 Jun 2007 07:16:53 +0100 Jeff B https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3587#Comment_3587 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3587#Comment_3587 Fri, 01 Jun 2007 08:55:40 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3591#Comment_3591 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=331&Focus=3591#Comment_3591 Fri, 01 Jun 2007 09:13:08 +0100 nigel Rule of thumb for evacuated tube is 75 to 100l per sq m.
Less than this will give extended periods of stagnation when the tank is at max temp and the panel will heat up to 200degrees plus.
During stagnation the fluid breaks down and needs replacing more often.

From practical experience of my panel I would optimise what you can get during the summer months and anything you get in the winter is a bonus.
Levels of solar radiation in winter are very low and not economic - my tank is rarely gets upto anything other then tepid in the winter months.

I would spend the extra on energy conservation measures.]]>