Horizontal venting? How far?

fscott55November 25, 2006

I want to put in a direct-vent fireplace, but I need to run it horizontally from the fireplace to the outside wall. The distance is about 10-12 feet. The problem is that I can't go vertical more than a foot or so.

I have looked at some various makes of fireplaces like Heat-n-Glo, Kozy Heat, Quadrafire. The only one that *appears* to go horizontally from the fireplace is Kozy Heat. They show they need a 1/4" rise per foot of horizontal run.

Does this mean I can exit the Kozy Heat fireplace with say a 45 degree angle and take it right into a horizontal run of 12 feet to the exit vent?

Other makes say you need like 2 feet of vertical for 3 feet of horizontal.... I'm very confused.

Thank you for reporting this comment. Undo

At a 1/4" rise per foot you would need a 3" rise for 12'. This must be over the total distance; in other words, the vent needs to be slanted upward for its entire run. No portion can be level, thus no 45 degree to hoizontal.
The 1/4" per foot rise does, however, seem too little. It's hard to see how adequate draft could be achieved. The quote of 2' vertical to 3' horizontal seems much more realistic unless the Kozy Heat has some sort of power venting system. Such systems have their own very real problems: frequent replacement, don't work in a power outage and more.

    Bookmark   November 26, 2006 at 5:40AM
Sign Up to comment
More Discussions
Does this old fireplace have options?
Hey everybody! My home was built in 1930 and originally...
Kristin Jennings
Recommendation on direct-vent gas fireplace?
Hi all, We are building a new home and plan to have...
something stinks in here!
I built a fire in out basement fireplace last week,...
Help me decide on a fireplace unit for new build
We are doing a gas Heatilator unit. Is there much difference...
Vermont stove
I have a resolute acclaim stove and the sealer around...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™