no 90 degree angles allowed in a SS insulated chimney?

[Jethro buckeye]

I'm thinking of installing a zero clearance FP in my basement in the corner. I was told by a local installer that I couldn't use 90 degree elbows, only 30 degree elbows coming off the top of the unit and then going through the block wall and then going up the side of the house.

I was thinking of using a 90 degree off the top of the unit, through the wall thimble and then another 90 degree up the side of the house. If this is not permitted by local code for factory built FP, is it allowed for wood stoves?

If I contact my local building dept, would they give me this info? Thanks, JB

[omnisparrow]

Hi Jethro,

Perhaps it's code in your neck of the woods, or maybe the particular fireplace you're installing prohibits 90 degree el's, but I did the same installation as you're proposing, and I did use two 90's. One to bring the pipe up to the height I wanted, and another to turn it straight out. I live in MN, and it's not a problem here.

Good luck!

Ron

[discountchimney]

Hello,

The first problem you will probably have is that most zero clearance manufacturers wont even offer over 30 degree fittings and it not recommended (mainly for cleaning purposes) on most prefab chimneys. They are not usually designed with cleanouts or the same kind of maintenance a “Class-A” (inset/ stove) chimney would require. They are a quick cost effective unit but only really good for open wood burning or gas units. With that said:

The general rule is the amount or rise vs. the amount of run (vertical vs horizontal). The unit instructions should have specific guidelines as to how much vertical height vs horizontal run can be allowed with maximum distances and amount of elbows allowed to maintain a proper draw. Each manufacturer can have different specs so it is truly dependent on the parts available (most zero clearance units are designed so that you have to buy their pipe with their unit as the connection design differs) and the specifics of your unit's specs.

Good Luck!

Kiersten

EMAILS AND WEBSITES NOT PERMITTED IN FORUMS

[Ed Imeduc]

Check code where you are and see what they say.

ED ;)

[pgtek]

hi
usually for every 90 degree pipe you need 12 ft of chimmeny

cheers

pg