what vent size?

[fatotto48]

Hi, I have a question about installing a vent to the roof. Right now I have a 3" going straight out the wall about 2ft out (recommended by dealer of course). I would like to pipe up above roof, about 13ft up. Should I change pipe from 3" to 4" on the vertical rise or will 3' be fine. Having some backdraft problems when stove shuts off.

 

[GrahamInVa]

You need to calculate your EVL. If it is 15 or higher you will need 4".

Look here..

http://nevelsstoves.com/pellet-stove-venting.html

 

[fatotto48]

Thanks, I printed it out. It'll be very helpful, just looking fast it looks like I could go with 3" pipe.

 

[imacman]

I calculated an EVL of approx. 13.5 .........you should be fine w/ 3" pipe.

 

[fatotto48]

Sounds good, thanks. No EVL for a top cap?

 

[imacman]

Sounds good, thanks. No EVL for a top cap?

No, end caps don't count.