325 Degree Resistant for Ducting??

[hugo1099]

I am installing a Hot Air Plenum kit to my Drolet Eco-65, and want to use insulated tubing to minimize heat loss. But the manual states that it must be at least 325 Degrees resistant. I can find semi-rigid tubing at this rating, but cannot find insulated aluminum tubing at this rating (aside from tubing that is thousand of dollars per 25')

Any help or suggestions??

 

[begreen]

That's a pretty high rating. Use metal piping and wrap it with good duct insulation that meets or exceeds this requirement. Do they say for how many feet from the unit this high heat value must be maintained?

 

[hugo1099]

That's a pretty high rating. Use metal piping and wrap it with good duct insulation that meets or exceeds this requirement. Do they say for how many feet from the unit this high heat value must be maintained?

No, just simply must meet 325 Degree Resistance. I'm thinking of going with the standard flex pipe (up to 400 degrees) then wrapping it later like you suggested if I notice alot of heat loss.

Here is the link to the install manual.

(broken link removed to http://www.drolet.ca/upload/documents/manuels/drolet/45516A_Manual_001.pdf)

 

[begreen]

Do you mean flexible aluminum pipe?

 

[hugo1099]

Do you mean flexible aluminum pipe?

Yes, aluminum.

 

[pageyjim]

That's a pretty high rating. Use metal piping and wrap it with good duct insulation that meets or exceeds this requirement. Do they say for how many feet from the unit this high heat value must be maintained?

+1

 

[Harvey Schneider]

Yes, aluminum.

If you are refering to the corrugated aluminum flex pipe, it adds a lot of turbulence to the air flow. That will make it more difficult to move air through the duct. Smooth walls of rigid aluminum duct work much better.
I looked into this when I was replacing the exhaust duct on my down draft cook top. Four feet or flex duct had an equivalent length of fifteen feet of rigid vent.