Question on roof air vent and ridge vent

nisryus

Senior member
Sep 11, 2007
800
165
116
So my house has a ridge vent, while also two of those round static air vents about 2 feet from it.

I was once told by a roofer that this was not a good setup beause this caused the hot air to go into a circle, so hot air would not escape but instead would be drawn back into the attic.

All of the other roofers just said its fine to have those round air vents near the ridge vent.

When i looked into the attic, one of the bathrm's ventilation actually goes out to one of the round static air vent via flexible duct .

If i were to only use the ridge vent only, maybe i can move one of the round static air vent away from it, and move the flexible duct to it right?
 

Red Squirrel

No Lifer
May 24, 2003
68,788
12,783
126
www.anyf.ca
Typically the air will go up through the vent, and make-up air will naturally get sucked through the soffits. Make sure your soffits do in fact have venting. Any extra vents don't really matter. Air won't really go in a circle, hot air will go up, sucking air from anywhere else it can.

I would avoid vents that are low though as they get snow covered and can be a cause of ice dams.

This is the style I seem to see being installed everywhere now days:


For vents such as bathroom fans etc, if you can avoid going through the roof altogether that's even better as it minimizes the amount of pipe that's exposed to the cold air during winter. Bathroom fans here are often vented through soffits or side vents like a dryer.
 
Reactions: nisryus

skyking

Lifer
Nov 21, 2001
22,453
5,468
146
Round Rock Texas = not a lot of ice dam problems.
This lad has heat more than anything
 
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