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philip18 10-24-2009 05:09 PM

return vent size change
 
I am re flooring my family room and thought it an opportunity to replace the original 15.5" x 10" vent with a smaller nice looking vent cover. Is there a reason not to do this?

The house was built in the early 1950s with gravity heat system, It is now a high efficiency forced air system.

Plumber101 10-24-2009 05:36 PM

Is this the only return?

Houston204 10-24-2009 05:37 PM

An undersized return can damage equipment. It is usually a bad idea to decrease the return size.

beenthere 10-24-2009 05:44 PM

Yep.
Got to watch decreasing return size.
Could harm equipment. Make lots of noise through the grille. And not be able to heat the house as well(as in not reach set temp of stat).

philip18 10-24-2009 05:53 PM

return vent size change
 
It is the only one in a room 13.5 x 17.5. I guess the consensus is, it's a bad idea.

Even considering the fresh air intake added to the outside?

beenthere 10-24-2009 05:56 PM

You can't put air into a room if you don't have a way for air to get out of a room.

So the fresh air intake, isn't providing a path for air to leave that room.

Also. With a fresh air intake. If you remove, or reduce return air from rooms. Due to the house leaking air out of it. You will increase the amount of fresh air that intake brings in. And increase your heating bill.

Plumber101 10-24-2009 05:58 PM

Again, Is this the only return?

dash 10-24-2009 11:18 PM

Quote:

Originally Posted by philip18 (Post 344982)
I am re flooring my family room and thought it an opportunity to replace the original 15.5" x 10" vent with a smaller nice looking vent cover. Is there a reason not to do this?

The house was built in the early 1950s with gravity heat system, It is now a high efficiency forced air system.


Yes,if anything, without a pros advice make it larger ,keep it the same,don't make it smaller.


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