Exhaust Duct

[ben3929]

What are the requirements to exhaust low-heat industrial appliances? Industrial oven rated 500 F and needing exhaust duct to flue hot gases out. I was informed to use class A double wall insulated duct and most of the duct manufacturers are not familiar with this classification. What is the insulation or wall thickness for class A double wall duct and what type of insulation is recommended for the specified oven temperature?

 

[Gr8blu]

Check what you're cooking in the oven - if you've got some items which give off volatiles that your local environmental guys don't like, you may also need some sort of (much higher temp) afterburner.

As to a definition of Class A double wall:
Think about what you'd see as a chimney system for a wood stove, like in the following link.

https://patriotchimney.net/what-is-a-class-a-chimney/

Converting energy to motion for more than half a century