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Old 08-22-2009, 08:58 AM   #1
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Can I reduce the vent size?


Hello,
We are doing home improvement on our own home. We are contractors, but our area of specialty is wood care, not HVAC.

Our upstairs hall has a large vent, when you remove it there is a large space and a small duct down low at the bottom of it. The area is next to the bathroom. We would like to open that wall up and create a recessed cabinet in the bathroom and reduce the vent area, but do not know if this will restrict airflow, or what our limits should be and wanted to check before doing this. Would be glad to take measurements, post pics, whatever....

Please advise....
Beth

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Old 08-22-2009, 10:47 AM   #2
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Can I reduce the vent size?


Where do you live, how old is the house and post a pic of the grill and vent in it. It may be a return vent from an old gravity furnace and then converted to a new furnace. You should be able to reduce it to the size of the vent it is attached to. I would stay a bit larger so it does not whistle/have air noise on the new smaller grill.


Last edited by yuri; 08-22-2009 at 10:58 AM.
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Old 08-22-2009, 11:54 AM   #3
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Can I reduce the vent size?


Thanks Yuri! I'll take photos this weekend and upload them.

House is 27 years old, we are the second owners. Same heating/cooling type system it has always had, electric house, heat pump. The vent I am talking about is a air reclaim vent (according to my hubby Rod) it just sucks air in. I'll get measurements and photos for you. I'm in Maryland on the east coast.

Beth
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Old 08-22-2009, 12:22 PM   #4
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Can I reduce the vent size?


Sounds like it is part of a HRV or ventilation system.
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