Pre-1900s property renovation in Edinburgh

RE: Pre-1900s property renovation in Edinburgh

RagnarIcedaine · 2021-12-07T11:47:48Z

Hi everyone, been reading up on a lot of the discussions here so thought I'd join in as I am about to renovate a property in Edinburgh (pre-1900s, full ground floor of detached house, sandstone exterior and lath and plaster interior walls, 3.6m high ceilings). Planning to put in UFH everywhere and a decent level of insulation in the floor. Will also draught proof where I can but architect has recommended to not put insulation behind lath and plaster in walls and have a neighbour living above, so no insulation in the high ceiling. I have double glazed windows too. A lot of debate right now in my head and with friends/family as to the best way to heat the house (ASHP/gas with future hydrogen/hybrid) as I am starting from scratch. Had an MCS calculation done and the contractor uses the Vaillant Aerotherm Plus but apparently I need 2 x 10kW units which seems high. Hoping to have some healthy debates and get some guidance here.

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Air Source Heat Pumps (ASHPs)

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RagnarIcedaine

(@ragnaricedaine)

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Topic starter 20/07/2022 10:53 am

@majordennisbloodnok

Thanks very much for your detailed reply.

My gut is telling me to go for the ASHP (recent/future gas pricing, flexibility with day/night tariffs, the heating emitters I will install and possibility to offset with solar/batteries etc.).

Being in Scotland in an 1850 sandstone building means that I'm limited in my ability to insulate walls etc. and hence the ASHPs being specified are on the higher side. I don't find them that pleasing to look at and would therefore ideally like to only have one unit outside (the original quote from our first company was 2 x 10kW but we will insulate where we can).

Also, there seems to be some debate with ASHP suppliers as to the effectiveness of my 600mm/lath and plaster walls in insulating the house. Though, my house has remained very cool even though it has been very hot outside recently. Hopefully, that is a good indicator that the house will hold the heat well in winter if I can sort the draughts/ventilation.

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