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Heat loss through the chimney

Want to discuss the different types of insulation; this is the place to do so.

Heat loss through the chimney

Postby Janet » Mon Dec 20, 2010 11:04 pm

Hi,

I've got a working fireplace, which I rarely use. It occurs to me that I must be losing heat through te chimney. Is there anything I can do to prevent this?

Thanks

Janet
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Re: Heat loss through the chimney

Postby Mattw » Tue Dec 21, 2010 8:01 am

Try a search for Chimney Balloons
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Re: Heat loss through the chimney

Postby Angib » Tue Dec 21, 2010 5:32 pm

Or also try lkooking for Chimney Pillow
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Re: Heat loss through the chimney

Postby JBrown » Tue Dec 21, 2010 10:17 pm

Open fireplaces seem often overlooked and you do not see much attention paid to them in literature etc. Not sure of the technical savings of blocking chimneys but from experience the reduction of drafts make a real difference in comfort, especially in the winter. Maybe one of the SAP experts can tell us what the typical loss would be per chimney.
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Re: Heat loss through the chimney

Postby Janet » Wed Dec 22, 2010 12:28 am

Have had a read up on chimney balloons, thanks. Genius! Will definitely invest in some.
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Re: Heat loss through the chimney

Postby HEA » Wed Dec 22, 2010 11:06 am

Amazon have some slightly cheaper and in different sizes. Be sure to get right size as you do not want it floating out of the top :lol:

From Amazon - Chimney Pillow up to 15" x 9"38cm x 23cm - there is only 1 review of the product which isn't great if you read it but maybe worth a try.
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Re: Heat loss through the chimney

Postby Angib » Sun Jan 09, 2011 3:33 pm

JBrown wrote:Maybe one of the SAP experts can tell us what the typical loss would be per chimney.

I just came across this thread and tried adding/removing an open chimney to see what effect it has on a couple of properties:
- On my Edwardian terrace, an open chimney adds about 500 kWh/year, a little under 2%, to the energy use.
- On a brand new semi, an open chimney adds aboput 600 kWh/year, a little under 5%, to the enrgy use.

To put 500-600 kWh/year into perspective, that's £15-35 per year, depending on what fuel you use.

Or, to make it sound more(!), it's the same as having a 200W light bulb burning continuously whenever the central heating is on.
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Re: Heat loss through the chimney

Postby Eddy » Tue Feb 01, 2011 9:45 am

HEA wrote:Amazon have some slightly cheaper and in different sizes. Be sure to get right size as you do not want it floating out of the top :lol:

From Amazon - Chimney Pillow up to 15" x 9"38cm x 23cm - there is only 1 review of the product which isn't great if you read it but maybe worth a try.


We got 2 of these chimney balloons /pillows after Matt a forum member recommended them !!

Must say they are worth every penny, not sure about cost saving with fuel and heating etc, but certainly help reduce the draft.

We bought them from Amazon here- Chimney Balloons and as per normal with amazon were delivered in days.

They are a little tricky to put up, suppose its a knack, but definitely a DIY job
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Re: Heat loss through the chimney

Postby Janet » Tue Feb 08, 2011 2:28 pm

Eddy wrote:
We bought them from Amazon here- Chimney Balloons and as per normal with amazon were delivered in days.

They are a little tricky to put up, suppose its a knack, but definitely a DIY job


What do you do when you want them taking out? Are they on a string?

How far do the chimney balloons go up the chimney, within reaching distance?
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Re: Heat loss through the chimney

Postby Eddy » Mon Mar 07, 2011 9:11 am

Hi Janet,

They are placed not far from the entrance of the chimney or at least that is where we put it and seems to work great.There is a simple valve that you use to blow it up and can deflate, these can be used over and over
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