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Insulation Of Fired Heater Stacks

fire heater combustion insulation stack insulation

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#1 Sherif Morsi

Sherif Morsi

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Posted 26 April 2019 - 06:40 AM



We are currently working on improving the efficiency of 3 regen heaters (all direct fire heaters). The stacks are not insulated. We are investigating whether we need to insulate them and whether this may improve the efficiency of operation.


What are the parameters that should be considered to decide on the insulation? Any guidance to specific codes/standards or textbooks would be appreciated as well.




#2 PingPong


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Posted 26 April 2019 - 08:52 AM

Why would insulating a heater stack improve the efficiency of the fired heater?


It would only increase the temperature of the flue gas leaving the stack into the atmosphere.


It would increase the draft of the stack somewhat, so if you would not adjust for that in some way the heater might consequently operate at a higher excess air which would reduce the heater efficiency.

#3 breizh


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Posted 26 April 2019 - 11:16 PM

hi ,

You may find some interest in the papers attached.


hope this is helping you.


Attached Files

Edited by breizh, 26 April 2019 - 11:21 PM.

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