Goodman 95% flue vent

marknn1985 · 11-05-2011, 06:31 PM

I just installed a 95% goodman gas furnace.For venting I have a 3" tee on the end.I was wondering if i could use a gas vent cap like this one
http://www.lowes.com/ProductDisplay?...llow&cId=PDIO1
or would it cause a problem?

Doc Holliday · 11-05-2011, 06:37 PM

If you're talking about the pvc intake and exhaust, no. I think that the flue vent is type b metal and should be 4" if I'm not mistaken. That cap is for the metal exahust (burned gases) vent.

Maybe someone with more experience with condensing furnces will chime in but I'm going to say no.

HVACDave · 11-05-2011, 06:47 PM

The "T" fitting is the termination, you shouldn"t have to put anything else onto the vent termination. Adding additional fittings can cause freeze ups of the vent, and additional resistance to the venting system.

marknn1985 · 11-05-2011, 06:47 PM

Yes sorry it is for the flue vent.Can i use anyother type of cap other than the tee cause it sticks over the top of my house and it looks funny.thanks for your help

yuri · 11-05-2011, 07:49 PM

You have plastic venting for a high efficiency unit. Cannot add anything to it and must follow Goodmans venting guidelines or it will develop pressure switch tripping problems. A fake owl is a good idea on top of it to keep small birds from nesting in it.

No lie.

11-05-2011, 06:31 PM	#1
marknn1985 Newbie Join Date: Nov 2011 Posts: 8	Goodman 95% flue vent I just installed a 95% goodman gas furnace.For venting I have a 3" tee on the end.I was wondering if i could use a gas vent cap like this one http://www.lowes.com/ProductDisplay?...llow&cId=PDIO1 or would it cause a problem?

11-05-2011, 06:37 PM	#2
Doc Holliday I'm Your Huckleberry Join Date: Mar 2011 Posts: 5,216	Goodman 95% flue vent If you're talking about the pvc intake and exhaust, no. I think that the flue vent is type b metal and should be 4" if I'm not mistaken. That cap is for the metal exahust (burned gases) vent. Maybe someone with more experience with condensing furnces will chime in but I'm going to say no.

11-05-2011, 06:47 PM	#3
HVACDave Member Join Date: Oct 2007 Location: Manitoba, Canada Posts: 260	Goodman 95% flue vent The "T" fitting is the termination, you shouldn"t have to put anything else onto the vent termination. Adding additional fittings can cause freeze ups of the vent, and additional resistance to the venting system.

11-05-2011, 06:47 PM	#4
marknn1985 Newbie Join Date: Nov 2011 Posts: 8	Goodman 95% flue vent Yes sorry it is for the flue vent.Can i use anyother type of cap other than the tee cause it sticks over the top of my house and it looks funny.thanks for your help

11-05-2011, 07:49 PM	#5
yuri Hvac Pro Join Date: Nov 2008 Location: Winnipeg, Canada Posts: 6,737	Goodman 95% flue vent You have plastic venting for a high efficiency unit. Cannot add anything to it and must follow Goodmans venting guidelines or it will develop pressure switch tripping problems. A fake owl is a good idea on top of it to keep small birds from nesting in it. No lie. Attached Images __________________ "Cut it twice and it is still too short". To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Last edited by yuri; 11-05-2011 at 08:29 PM.

Goodman 95% flue vent