Sat, 02 May 2026 05:48:40 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9406#Comment_9406 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9406#Comment_9406 Wed, 14 Nov 2007 15:22:32 +0000 Edwin I am hoping someone can advise me as to the dos and don'ts of this combination.
I am installing an Ice Energy heat pump running underfloor heating and hot water and want to integrate
a wood burner with back boiler to run 5-8 rads and provide hot water back-up.
Two initial questions:
1) Does anyone have technical plumbing information for this kind of set-up?
2) Does anyone know if the HWAM Classic 4 stove is capable of taking a back boiler?
I'm trying to find a boiler which is utility/contemporary in style but with the boiler option....
I'm trying to avoid the traditional looking boiler such as the Charnworth......
Thanks]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9408#Comment_9408 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9408#Comment_9408 Wed, 14 Nov 2007 15:26:34 +0000 tony
Even better spend on insulation and draft sealing forget the wood burner and only pay for a small heat pump and perhaps a solar panel.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9410#Comment_9410 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9410#Comment_9410 Wed, 14 Nov 2007 16:06:06 +0000 Edwin
Does anyone shave knowledge on the plumbing side and boiler models if possible - I'm having a hard time getting reliable information...

Cheers]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9413#Comment_9413 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9413#Comment_9413 Wed, 14 Nov 2007 16:12:28 +0000 tony
For sure even poorly insulated the wood burner will make you too warm.

With the gshp you dont really need a thermal store but you can use one. Then hook it up to both heat sources. Some thermal stores heve a pair of low down tappings specially for under floor heating.

My advice is just have the wood burner to look at!

Have you built yet?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9416#Comment_9416 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9416#Comment_9416 Wed, 14 Nov 2007 16:26:50 +0000 Edwin
Thanks for the link.

Exactly - woodburner for aesthetic as much as heat.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9418#Comment_9418 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9418#Comment_9418 Wed, 14 Nov 2007 16:36:15 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9436#Comment_9436 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9436#Comment_9436 Thu, 15 Nov 2007 00:18:08 +0000 Edwin so we are covered for all those technologies Tony - thanks though - you're right, insulation is absolute key!).

Sorry to stress the point but I am really keen to talk to someone who has integrated GSHP and woodburner with backboiler (OR another heat input source e.g. solar) - someone
with plumbing / tech spec knowledge. KOYA are confident and that's great but I am the kind of client who likes to keep eyes on costs and constantly changing technologies...
This project is LIVE and avtive so if anyone out there is interested in getting involved please post.....

ESPECIALLY on the woodburner/backbolier issue re: plumbing

many thanks

Ed]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9447#Comment_9447 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9447#Comment_9447 Thu, 15 Nov 2007 09:48:54 +0000 ted
I have a GSHP but without a second input (solar is waiting for the money).

Get a thermal store that will accommodate at least 3 inputs in total. (Why would you not want solar?)

Get it installed by a plumber who has done it before.

Have a look on the Navitron Forum (sorry Keith!) for plenty of advice from plumbers. http://navitron.org.uk/forum/]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9463#Comment_9463 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9463#Comment_9463 Thu, 15 Nov 2007 13:29:45 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9474#Comment_9474 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9474#Comment_9474 Thu, 15 Nov 2007 20:08:31 +0000 Edwin
Tony the HW source is heat pump.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9481#Comment_9481 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9481#Comment_9481 Thu, 15 Nov 2007 23:55:13 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9486#Comment_9486 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9486#Comment_9486 Fri, 16 Nov 2007 00:51:59 +0000 Edwin
Does anyone have any stove experiences/reccommendations?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9495#Comment_9495 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9495#Comment_9495 Fri, 16 Nov 2007 10:18:12 +0000 tom.harrigan
I would keep the two separate, with the GSHP powering the underfloor heating. Wood with electric backup could be used for the hot water (and perhaps the odd radiator). Solar works well with wood for hot water as both produce water at a high temperature. Heating water with wood is not without its problems. The main issue is that you must avoid designs where the water jacket cools the fire or you end up fractionally distilling tar in your chimney.

T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9496#Comment_9496 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9496#Comment_9496 Fri, 16 Nov 2007 10:32:09 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9499#Comment_9499 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9499#Comment_9499 Fri, 16 Nov 2007 11:02:24 +0000 tom.harrigan
T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9500#Comment_9500 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9500#Comment_9500 Fri, 16 Nov 2007 11:09:01 +0000 tony
Does not sound pointless to me.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9502#Comment_9502 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9502#Comment_9502 Fri, 16 Nov 2007 11:20:04 +0000 Ice Energy Regards
David]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9503#Comment_9503 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9503#Comment_9503 Fri, 16 Nov 2007 12:01:41 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9508#Comment_9508 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9508#Comment_9508 Fri, 16 Nov 2007 13:53:51 +0000 tom.harrigan
T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9509#Comment_9509 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9509#Comment_9509 Fri, 16 Nov 2007 14:02:12 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9533#Comment_9533 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9533#Comment_9533 Fri, 16 Nov 2007 21:06:40 +0000 Edwin Sounds like you have experience with this - can you recommend a brand of woodburner which overcomes this?

Have to say though that I'm with Tony on the savings equation - and for good reason - I have researched and seen proven systems and spoken with
the owners.

Don't forget that UF heating needs much lower temperatures than those to heat HW supply of course....notice that Ice Energy have contributed above!
They tell me that HW @ 55 degrees is well within capacity and UFH needs 25 degrees.

I am aware of the fledgling nature of this market and therefore the lack of info out there - and presumably that's where Tom is coming from -
i.e. lack of real world case history info. Koya have a good track record of installations of GSHPs to suit all types of situations and with/without
complimentary heating technologies - simply, it works - but each individual building/situation/requirement needs tailoring to suit itself.

Anyone plumbed a system like mine!?

Many thanks


]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9535#Comment_9535 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9535#Comment_9535 Fri, 16 Nov 2007 21:39:11 +0000 Mike (Up North)
Dont forget tht the basic equation is that the heating system has to equate to the heat loss and that is true what ever the system so minimusie yor needs first then choose.
Cheers, Mike way up north]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9545#Comment_9545 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9545#Comment_9545 Sat, 17 Nov 2007 08:39:48 +0000 tom.harrigan http://www.cosi.co.uk/prod02.htm

A fancy stove that looks like it will work is the Rika Tavo Aqua.

T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9551#Comment_9551 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9551#Comment_9551 Sat, 17 Nov 2007 12:26:50 +0000 ted
I do know that when we have the 500 liters store starting at ambient temperature (15C) it takes less time to heat this to 55C using the GSHP (with a 2.75kW input/12kW output rating and running only intermittantly) as compared to using the 3kW (running constantly) immersion back-up.

Powered by the GSHP it takes about 3 hours to get up to 55C whereas when powered by the immersion it took over 7 hours. (Someone with all the BTU, MJ etc forumlae can hopefully confirm that this result aligns with what might be expected.)

Other than to check that it was working OK initially I have no reason to ever want to turn the immersion on.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9552#Comment_9552 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9552#Comment_9552 Sat, 17 Nov 2007 12:42:02 +0000 tom.harrigan
T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9553#Comment_9553 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9553#Comment_9553 Sat, 17 Nov 2007 13:22:54 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9556#Comment_9556 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9556#Comment_9556 Sat, 17 Nov 2007 13:49:35 +0000 tom.harrigan http://www.heatpumps.co.uk/graphs.htm

T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9568#Comment_9568 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9568#Comment_9568 Sat, 17 Nov 2007 19:25:00 +0000 Edwin

]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9570#Comment_9570 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9570#Comment_9570 Sat, 17 Nov 2007 19:49:33 +0000 tom.harrigan
T]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9576#Comment_9576 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=869&Focus=9576#Comment_9576 Sat, 17 Nov 2007 23:25:53 +0000 Edwin
And that .. surely .. is the point .. that all these emerging technologies need to be applied according to the
specific case.

Hi Tony - have you read my information above about my build or are you just preaching? I'm genuinely asking for advice not a total re-plan!

Thanks again.


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