Is there a Max number of 90s that can be used with 4” pellet vent?

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Quadrafire 52

New Member
Sep 5, 2021
13
Massachusetts
Using 4” ICC Pellet vent in basement installation. ( Quadrafire Mt Vernon AE)
Wanted to go up out and Up to Avoid any sooting on exterior of house . Is there a MAX number of 90s that you can use? ( I realize each 90 is equal to 5’ of pipe)
Thank You
 

Quadrafire 52

New Member
Sep 5, 2021
13
Massachusetts
Yes I have the same manual. Unless I’m missing something it doesn’t mention a MAX number of 45s you can use . The reason I ask is I was at at pellet stove dealer today and the guy told me the max number of 45’s allowed is 3 so I came back home and re read everything and still didn’t see it!
Maybe I Missed it !
but I figured I would throw that question out there in case I did !
Thank You
 

johneh

Minister of Fire
Dec 19, 2009
3,626
Eastern Ontario
I don't think there is a max number of 45 you can use !
Just remember every 45 puts the equivalent of 3 ft. rise in the chimney
a90 is 5 ft. so use accordingly
 

Washed-Up

Minister of Fire
Nov 5, 2011
667
Kananaskis,Alberta, Canada
The more 90’s you use will increase the turbulence of the exhaust and work your combustion blower harder
 
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Former Farmer

Minister of Fire
Apr 12, 2008
590
NE Wisconsin
It looks like if your total calculated equivalent feet is 30 or less, you should be fine. I did not see any limit on the number of 90's or 45's listed. The 3 90's in figure 13.1 is just an example.