08:42AM | 06/23/04
Member Since: 06/22/04
1 lifetime posts
Our oil central heating boiler forms part of our airing cupboard. The chimney needs to be insulated to avoid a fire hazard in relation to the clothes/linen that would otherwise butt-up against the chimney.

The chimney gets quite hot.

What is the best/most economical method of insulating the chimney?


07:32AM | 06/25/04
Member Since: 07/01/03
549 lifetime posts
I am a little confused here, **boiler forms part of our airing cupboard** Are the hot parts you are referring to the combustion chamber of the boiler, or the chimney?

If the chimney gets that hot, something IS drastically wrong as HKestenholz points out. You are not getting your money's worth out of the energy you pay for, with radiant losses to the boiler walls, or direct losses to exhaust. You know, if that much heat is going up the chimney, there may be a problem (deposits) in your boiler, preventing heat from being utilized to heat the exchange fluid (water). A new, higher efficiency unit may be justified based on energy savings.

If the wall of the boiler is in your airing cupboard, then a fireproof insulation may indeed be what is needed. What is the proximity to combustible framing? The configuration of your installation is hard to visualize.
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