The hole dimensions are therefore 11 1 4 inches by 11 1 4 inches.
Do you rough sand an inset floor vent.
Adjustable box damper also available.
Protecting wall air returns.
How to measure for wall ceiling and floor vent covers not hinged air returns step one.
Insert the vent into the frame.
This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs.
In this video i share with you how i install a hvac air duct floor vent.
Hvac ductwork in floor slabs.
Measure the size of the duct.
Deciding which type of vent you d like is one of those details that you ll want to consider from the start.
That s not to say builders do not do that any more but i think it s fair to say they avoid that practice.
Outside lip overlaps 3 4 all the way around the vent.
Cleanly designed with a solid self rimming lip to conceal inexact cuts in your surface material.
Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories.
Order by the duct size.
It was a common practice in the 1970s and 1980 to place the homes ductwork in the sand and soil prior to the pouring of the homes slab.
Do not order by the size of your existing vent cover.
This is one of those things that can go unnoticed but have.
The fiberglass filter media material will allow the air to flow out of the vent and trap large dirt particles and debris.
Remove your existing floor wall or ceiling vent cover.
If you are installing a 12 inch by 12 inch vent for example the sleeve will measure approximately 11 inches in width and length.
There are many ways but this is the way i do it efficiently with quality and time.
You will still need to vacuum your duct at the rough in but not nearly as much if you did nothing.
To get you started thinking about which you might like the experts at svb wood floors have some facts about drop in versus flush mount wood floor vents.
Consider floor vents before installation is done.
Sand it with the rest of the floor to prep it for the seal and topcoat.
I don t think i have come across a newly built home with the hvac ductwork in the concrete floor.
Simply cut it to fit over your rough in floor duct and secure it in place with a few screws.