Flue Temperature and efficiency lie
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Flue temperature and efficiency Con!

Proof your money is going up in smoke!

WOOD STOVE style and function in one, like no other!!

so your wood stove manufacturer say you have to have a flue temperature of 400 C to be efficient? 

well you might burn the wood efficiently but all you are doing is heating your flue and not your home. any heat going up the flue is heat lost.

The key here is you need the flue gas to be just hot enough so that water in the gas dose not condense in the flue and run back down. It also needs to be warm so that it will create a natural draft. From tests I have found to create a draft one only needs about 60 K to the ambient!

Next to stop the condensing of the water out of the flue gas. 

this is all dependent on dew point, and the flue wall temperature.

so what is critical here is the exiting temperature of the flue gas and not the entering temperature and most manufactures claim!

So dew point! this will get worse an you burn wetter wood, but even so if you have an exiting temperature of 90 C to 100 C that should be more than sufficient!

so over a 8 meter insulated flue at working temperature you are only loosing  about  20C  to 50 C you can see all your money is literally going up in smoke!

Simple maths, if you add 100 C and 50 C you get 150C for the worst case scenario for a flue temperature coming out of the top of your wood stove! any higher and you are seeing your money go up in smoke!

My stoves have a fan on finns to get the heat into your home, or a water heat exchanger that can be calibrated to your flue! nothing like that any where but here!

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