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Old 04-15-2019, 10:36 AM   #16
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Re: Move return vent?


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Originally Posted by Yodaman View Post
Neal your idea would work, but it is not ideal. By the time you do all the carpentry in the closet, it wood have been easier just to move the grill. Doing so shortens the trunk line, your method increases it and and will add turbulence and resistance.
Furnace in attic, where would suppose the registers are, one return at the ceiling already, what will move the cold air off the floor?
He can just open the bay inside and put what ever rectangle he needs there and he gets a closet.
Anything inside there is better that what he has now.
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Old 04-15-2019, 10:58 AM   #17
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Re: Move return vent?


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Originally Posted by Nealtw View Post
And a 12" round =
14% more volume than a 7x14 duct.

So by moving the grille up and shortening the duct, he will increase his return air flow slightly instead of decreasing it.

It will also prevent losing closet space.
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Old 04-15-2019, 11:01 AM   #18
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Re: Move return vent?


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Originally Posted by beenthere View Post
14% more volume than a 7x14 duct.

So by moving the grille up and shortening the duct, he will increase his return air flow slightly instead of decreasing it.

It will also prevent losing closet space.
What about not pulling air from the floor area?
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Old 04-15-2019, 02:49 PM   #19
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Re: Move return vent?


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Originally Posted by Nealtw View Post
What about not pulling air from the floor area?

Depending on the type of ceiling registers he has, he may or may not notice any difference. Also position of the supply registers in the ceiling effect it.
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Old 04-15-2019, 03:42 PM   #20
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Re: Move return vent?


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Depending on the type of ceiling registers he has, he may or may not notice any difference. Also position of the supply registers in the ceiling effect it.

Well, I kind of think, that might be a big change to a system.
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Old 04-15-2019, 03:45 PM   #21
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Re: Move return vent?


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Well, I kind of think, that might be a big change to a system.

Due to increased velocity from the greater return air flow. Probably very little change.
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Old 04-17-2019, 12:00 PM   #22
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Re: Move return vent?


Ok, someone other than you had a Co move the AC. That Co should have moved the air vent to the ceiling. I don't know without looking at it if you could still have a ceiling vent put in. Then you would have a closet to use.
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Old 04-17-2019, 12:45 PM   #23
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Re: Move return vent?


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Originally Posted by l_n_r_carrs View Post
Ok, someone other than you had a Co move the AC. That Co should have moved the air vent to the ceiling. I don't know without looking at it if you could still have a ceiling vent put in. Then you would have a closet to use.
If this is AC and not heat, then this is far and away the best idea.

Second best would be to move the register to the top of the wall as you layed out in your original post. But if you do that you will be making a very tight bend in the flex duct and that will really restrict your air flow. (Notice the gentle curve in your existing installation. That's much better.) It might be smarter to make a plenum in the upper part of the closet instead. You'd lose the upper part of the closet, but you would still be able to put a hanging rod or shelves below that.
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Old 04-18-2019, 08:06 AM   #24
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Re: Move return vent?


The system is for both heat and A/C. I'm in NC and A/C is probably more important.

The inside of the closet is over 9 feet tall so there is plenty of room to make a gentle bend with the duct.

My preferred solution right now is to leave the register where it is and create a "duct" in the wall that has an equivalent area as the existing duct.

That way I leave the return register close to the floor and I don't have to do any drywall work or repaint.

HVAC is not easy.

D.
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Old 04-18-2019, 08:42 AM   #25
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Re: Move return vent?


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Old 04-18-2019, 08:50 AM   #26
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Re: Move return vent?


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Originally Posted by Dutch2 View Post
The system is for both heat and A/C. I'm in NC and A/C is probably more important.

The inside of the closet is over 9 feet tall so there is plenty of room to make a gentle bend with the duct.

My preferred solution right now is to leave the register where it is and create a "duct" in the wall that has an equivalent area as the existing duct.

That way I leave the return register close to the floor and I don't have to do any drywall work or repaint.

HVAC is not easy.

D.
I would remove the drywall from that stud bay. add the second wall but leave the studs further apart to give you move square inches in that cavity. The grill may already have access to two cavities
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