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Heating and cooling: strawbale extension, stone cottage, multifuel stove and additional heating
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- CommentAuthortwolittlepiggies
- CommentTimeJul 13th 2012
We are putting a straw bale extension (42sq m) onto a 19th century stone cottage (40 sq m) in North West Wales. We want to have a multifuel stove with a back boiler for hot water situated in the cottage which will be the main living room . The extension will contain 2 beds and a bath. The cottage and straw bale will be insulated to the hilt. We are wondering if we need much more heating and if radiators in 2 bedrooms and at other end of stone cottage are necessary. There will be electricity but no gas. We are planning solar thermal in future but poss not photovoltaics.
thanks for any comments -
- CommentAuthorGaryB
- CommentTimeJul 13th 2012
I think you will still need some heating in the bedrooms regardless of the levels of the insulation.
We have one bedroom (room in roof) which has been insulated with 400mm GF on the roof and 200 on the walls & between the rafters. The only weak point is the standard double glazed windows. We turned the heating off in the room this winter and the temperature dropped at night to 11 deg C when unoccupied. When occupied by one person the temperature rose to 13 - 15 deg C.
Unless uou would be happy with these temperatures a small radiator or heater would be necessary. -
- CommentAuthorJonti
- CommentTimeJul 13th 2012
GaryB,
does the bedroom need to be any warmer than 13-15C unless being used as an office?
Jonti -
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CommentAuthorDamonHD
- CommentTimeJul 13th 2012
14C is generally OK for a bedroom I think, and when I am using mine as my office 14C is a little chilly but my fingerless gloves help!
Rgds
Damon -
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- CommentAuthorGaryB
- CommentTimeJul 14th 2012
Jonti
13 - 15 deg C is OK in our house. -
- CommentAuthorjms452
- CommentTimeJul 14th 2012
While your spec is totally up to you I would argue that we should (As a general rule) be aiming for systems that can achieve room temperatures the rest of the population would be happy with i.e. 18C bedrooms 20C for living spaces - but using much less energy/money. Of course this doesn't stop you running it at 14C.
Otherwise when you are old/ill/sell-up the job will need redoing.
There is also a perception issue that I'd hope over time the wider populace will increasingly come to regard green buildings as comfortable and pleasant to live in rather than cold and unpleasant. That way every property you rennovate is there as a positive and lasting legacy for the future inhabitants. -
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CommentAuthorDamonHD
- CommentTimeJul 14th 2012
But 14C is *not* unpleasant to sleep in; 20C+ is IMHO. I much prefer to sleep in a cool well-ventilated room with a nice thick duvet pulled up under my chin.
And neither is a living room at 17C. DECC's Chief Scientist keeps his house at 14C throughout, for his whole family, but does feel free to crank it up if he feels cold.
So we should be aiming for an understanding of what is actually required to be comfortable and healthy, IMHO.
Rgds
Damon -
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- CommentAuthorfinny
- CommentTimeJul 14th 2012
Agree with John above..
Integral systems designed to meet the current occupants needs are today may not suit even their needs twenty years hence.. houses should perform excellently, whether you need 14 or 20 degrees in any room surely?
As to the original post.. run the calcs for the extension, If in doubt, a bit of pipework and two rads aren't the end of the world..
pm me if you like, I am nearby -
- CommentAuthorjms452
- CommentTimeJul 14th 2012
Posted By: DamonHDBut 14C is *not* unpleasant to sleep in; 20C+ is IMHO. I much prefer to sleep in a cool well-ventilated room with a nice thick duvet pulled up under my chin.
And neither is a living room at 17C.
So we should be aiming for an understanding of what is actually required to be comfortable and healthy, IMHO.
Personally I agree with you - I don't think 14C should be the design goal.
twolittlepiggiesComment - appologies for diverging from your thread somewhat
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