Green Building Forum - Telegraph Article - Eco rebuild Wed, 17 Jun 2026 16:14:10 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 Telegraph Article - Eco rebuild https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310857#Comment_310857 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310857#Comment_310857 Tue, 16 Jun 2026 12:03:45 +0100 borpin
https://www.telegraph.co.uk/gift/c79c96400f3a8bff
https://www.telegraph.co.uk/money/net-zero/i-spent-900000-creating-the-ultimate-eco-home/

One thing I noted is that he is funneling his MVHR extract into a 'cupboard' around the Heatpump. That sounds like an excellent idea.]]> Telegraph Article - Eco rebuild https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310859#Comment_310859 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310859#Comment_310859 Tue, 16 Jun 2026 14:11:39 +0100 WillInAberdeen
Issues were that (for most homes, except super insulated ones like this one) the energy loss in the MHRV extract air is only part of the energy requirements of the home, as there are other fabric losses. So a heatpump running only on MHRV extract air will not recover enough heat without backup direct electric heating.

In this case he maybe hasn't realised that the MHRV extract air carries all the damp out of the house, so is liable to ice up the heatpump.

Seems like he has enough funding that he doesn't need to listen to others' experience though! If it doesn't work out he can afford to fix it. Sometimes that helps for trying new things out!]]> Telegraph Article - Eco rebuild https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310863#Comment_310863 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310863#Comment_310863 Tue, 16 Jun 2026 17:24:36 +0100 Dominic Cooney Telegraph Article - Eco rebuild https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310870#Comment_310870 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18447&Focus=310870#Comment_310870 Wed, 17 Jun 2026 14:04:18 +0100 borpin Posted By: WillInAberdeenIt's equivalent to an Exhaust Air Heatpump (EAHP) which seemed like an excellent idea but didn't catch on.I think he is just using the warmer air to reduce the need for defrosts when cold.
Posted By: WillInAberdeenIn this case he maybe hasn't realised that the MHRV extract air carries all the damp out of the house, so is liable to ice up the heatpump.
Ah, true.

I wonder what the physics says on that.]]>