Latest Discussions : HVAC


10:16AM | 02/21/04
Member Since: 05/18/03
8 lifetime posts
During the winter, a strange sweet smell comes out of the air vents in the master bedroom. I hired a duct cleaner but the smell is still there. After a year of not being able to determine the cause of the smell, I cut some holes in the floor of the bedroom to see the duct system underneath the floor. The space underneath the floor really smells of that sweet smell. I have no idea where it is coming from, except that my neighbor's bathroom is underneath and possibly some air freshener is seeping through. Anyhow, there must be a leak in the air duct system because one, the smell is coming out of the air vents, and two, when I turn on the fan, a draft comes out of the floor holes. There is a main duct, from which three flex ducts come out. The flex ducts are attached with a "petaled tabs" arrangement, where each tab alternately goes in or out of the hole in the main duct. Do you have any suggestions on how to determine where the leak is and seal it? Thanks.


02:04AM | 01/20/07
Member Since: 09/29/04
1 lifetime posts
When you turn on a fan, ac, vent, or use a fireplace....outside air comes into your home. On the top floor it is more likely that you are drawing in rooftop vent pipe air than air from the floor below. To test this the next time you get the odor perform the following test. Go to the window area where the odor is strongest. Slightly open the window a crack (about 1/4 inch or less) to get a small air flow. If the smell gets worse you may have a sewer vent problem that can be solved with a

if the smell goes away call a plimber you have an inside plumbing problem.

Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply choose button


Post new button or Login button