Which vent cap?

[racer8432955]

I've begun installing my 75k Big Max propane unit. I would like to go with a horizontal vent, as it seems like an easy short shot out the wall. My question is on vent caps, do I need one specific for horizontal venting (see pic 1 below), or will a vertical work? Do those of you who have went this route use the high wind version, or get by with the standard? Do mind spending the extra on the high wind, if necessary, but would like to save a buck if possible..
My second question, if you go with a horizontal vent set up, could you not just put a 90 on the end, and standard vent cap on top. It would be code specified distance from wall, but then would I also have to bring it to the code specified distance above roof line (keep in mind i'm already the appropriate distance off wall? See pic two below for better explanation. Advance Thanks!
PICTURE #1

PICTURE #2

 

[dave67fd]

The high wind cap is fine. Im pretty shure their rain guarded as well but you might check.
Just make shure it's designed for B-pipe and is screwed and sealed.
If your not in a normal high wind area the standard rain cap is sufficient. You don't need to 90 up at the termination point.

 

[racer8432955]

Thanks dave67fd. Would there be anything improper about putting a 90 and a vertical vent cap on? If not, what length of vertical pipe would I need (pic 2 where the ? mark is).
Reason I ask... the horizontal vent caps, especially the high wind ones, are difficult to find (locally) and expensive. If it's one and the same, I would consider going that route.
Thanks!

 

[icefisherman]

I live in MN and my horizontal venting faces the north side of my garage, I was having a issue when it would get real windy the exhaust would go back into the unit causing it to shut down. I called mr. heater and they told me I could put a 90 than a cap on top of that to help it. I never had a issue since I did that.

 

[REDSHELBY]

The pipe should sloop down. This prevents water from going into heater.My reznor installation instructions had this info in the venting section.

 

[dave67fd]

The pipe should sloop down.

Not necessarily. It all depends on the installation type (residential or commercial) and required codes. If catagory I residential venting is used there are certain limitations (dimmensions) that apply when a vertical rise installation is used.