Roof vent for my HVAC systems equals total ugliness.

[hvacsmart]

What do you guys use for roof vents for your HVAC installations? I have been setting up vents from 2" pvc and I hate the way it looks under the code.
I have a 2" pipe sticking out with a long sweep elbow on top. Looks like a snorkeling device. Is there anything more professional on the market?
I can always pain the pvc into gray, but still there's got to be something better.

[t527ed]

we use concentric kits for going out the roof.

[BaldLoonie]

What are you putting an elbow on? Vent should stick straight up, intake should elbow 180° down toward the roof.

527 has the best idea.

[hvacsmart]

I thought direct vent does not have to stick up, but elbows down.
I have a 2" pvc going up 18" and then an elbow going down.

[heatpumpguru]

They sell sleeves for them to match roof

[BaldLoonie]

Pointing your vent down allows the gases and acidic condensate to drip on the roof. Best to blow straight up. Besides, rain keeps the trap full :p

[drcustom]

If you're talking air supply for sealed combustion chambers (ie. direct-vent), that must be kept dry, hence the long rad elbow; for venting (ie. exhaust), you have to keep it straight like other's have said, less risking recirculation of gases via the intake and/or an inordinate PD given the 180* turn. Use concentric kits, they look and work great. One hole to cut through the roof.

[hvacsmart]

No. My air supply for the furnace has a small outlet on the furnace and it is in the utility room. The utility room has a vent in the wall. I was talking about direct vent exhaust that I run through the roof with PVC and I add a long sweep elbow pointing down.

[BaldLoonie]

Blow her straight up!

[tinknocker service tech]

what do the instalation instructions say to do. This is why they come with a furnace:mad:

with a down turn on the exhaust you can get ice cycles coming from it to the roof and if it is cold long enough the ice can block the opening

[hvacsmart]

What you're saying is true, but why direct vent going to the side of the house has to point downward?

[tinknocker service tech]

What you're saying is true, but why direct vent going to the side of the house has to point downward?


the intake goes down and exhaust goes straight so it will blow away from the house and intake if there is one

read the book it is explained in there how to terminate

[hvacsmart]

which book?

manuals don't have anything on the subject.

[comfortdoc]

which book?

manuals don't have anything on the subject.

What brand/model furnaces do you install? The installation manual will have several examples of proper vent termination. Most manufacturers have several pages of venting options.

[hvacsmart]

I mostly install Goodman.
I just read the installation guide. Looks like I was wrong all along. Seems like it's possible to have intake and vent at the same time on the same pipe.
I'm not sure how it works, because when the furnance is exhusting air that bad air would get into the intake unless there is a segragation somewhere in the pipe.

[mdharris68]

Possibly the picture that you are refering to is a concentric vent kit. The exhaust pipe goes straight through the kit by coupling to the end. The other pipe angles into the side of the outer sleeve of the kit and sucks air around the inner pipe for the combustion makeup air. If this does not make sense, google search pvc concentric vent kit. on images. I actually found a picture of one from a Goodman Dealer. Hope this

<Please don't link to that site. Thanks.>

[hvacsmart]

I found the alpine home air pdf file as well. Thanks. Makes perfect sense now.
Looks like I picked up my approach from the wrong guy.