Tue, 19 Dec 2023 08:38:35 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300357#Comment_300357 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300357#Comment_300357 Sun, 19 Feb 2023 17:55:08 +0000 kaicasswell https://www.paw.eu/en/applications/dhw/

I'm planning a larger buffer tank with supplementary solar thermal heating and instead of a separate DHW cylinder, use a fresh water module for hot water. from memory they claim 45C - 22L/min at 55C store temp

The buffer is 800 litres and solar will be six flat plates, so a reasonable contribution in spring and autumn to space heating. Overall heat demand is lowish - 8kW]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300358#Comment_300358 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300358#Comment_300358 Mon, 20 Feb 2023 08:07:25 +0000 GreenPaddy
I haven't compared costs for the above 2 items versus the Friwa black box, but if there's a large markup, then I would buy the individual items.

For info. the thermal balancing valve acts to restrict the flow of hot water from the buffer (on the outlet of the PHx) to match the flow of heating water with the fresh water being heated ie. restrict the outflow heating water temp, being controlled to a cool temp, to prevent wasting heating water in lower fresh water flow situations.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300363#Comment_300363 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300363#Comment_300363 Mon, 20 Feb 2023 11:44:06 +0000 djh http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300386#Comment_300386 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17746&Focus=300386#Comment_300386 Tue, 21 Feb 2023 21:16:59 +0000 kaicasswell Posted By: djhI'm not entirely sure I understand what the module is. Is it something you add on to a plain water tank to turn the tank into a thermal store? I'm not clear why it would be preferable to buying a ready made thermal store?

its something you add on to a buffer tank, to get DHW. The buffer tank (thermal store almost) is heated by various things solar/heat pump/gas/immersion. I guess the flow rate and secondary circulation option make it better than a thermal store with just a mains pressure DHW coil inside.]]>