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-   -   New register openings? (http://www.diychatroom.com/f17/new-register-openings-167574/)

Emcee 12-28-2012 12:37 AM

New register openings?
 
Hi, I'm new to the forum, hopefully my question has not been asked before, my apologies in advance if it has.

I am renovating my first house (an 1150 sq. ft. ranch built in 1971) on a budget. One of the goals is to update the look of the interior (obviously) while I renovate, so I really wanted to get rid of the hideous old baseboard registers and convert them into floor registers.

I know there are a lot of technical things involved in hvac, so I want to make sure it's okay to change a 2 1/2"x12" vent opening to a 4"x10" one.

You should know that the hvac system is completely shot and will need a complete replacement, so I am not really worried about current system or lines, etc. I just basically need to know if it is okay to go ahead with this so that I can cut the holes and start putting the flooring down.

ben's plumbing 12-28-2012 06:31 AM

Quote:

Originally Posted by Emcee (Post 1081004)
Hi, I'm new to the forum, hopefully my question has not been asked before, my apologies in advance if it has. I am renovating my first house (an 1150 sq. ft. ranch built in 1971) on a budget. One of the goals is to update the look of the interior (obviously) while I renovate, so I really wanted to get rid of the hideous old baseboard registers and convert them into floor registers.
I know there are a lot of technical things involved in hvac, so I want to make sure it's okay to change a 2 1/2"x12" vent opening to a 4"x10" one. You should know that the hvac system is completely shot and will need a complete replacement, so I am not really worried about current system or lines, etc. I just basically need to know if it is okay to go ahead with this so that I can cut the holes and start putting the flooring down.

yep you can install 4x10 ...ben sr

REP 12-28-2012 07:02 AM

They are almost the same size cfm wise,no need to change them.It is really more importyant to have as many cold air returns as possible.Returns make the house more comfortrable and lets the furnace breath better if sized right.

Emcee 12-28-2012 10:10 AM

Thanks guys. I know I don't have to replace them, just personal preference.
I just wanted to make sure I wasn't messing with capability of the unit by doing so.

Technow 12-28-2012 12:47 PM

If it was my house.....

Would do a load calculation...would determine how much air needed to be delivered to the room...would determine how many and what size vents needed to be supplied to the room and then start hacking away at the hardwood floor.

carmon 12-28-2012 08:11 PM

[quote=Technow;1081278]If it was my house.....

Would do a load calculation...would determine how much air needed to be delivered to the room...would determine how many and what size vents needed to be supplied to the room and then start hacking away at the hardwood floor.[/quote

oh my......

Technow 12-29-2012 08:23 AM

[quote=carmon;1081547]
Quote:

Originally Posted by Technow (Post 1081278)
If it was my house.....

Would do a load calculation...would determine how much air needed to be delivered to the room...would determine how many and what size vents needed to be supplied to the room and then start hacking away at the hardwood floor.[/quote

oh my......

??

How much cfm needs to be delivered to the room?

2x12 is 70cfm

4x 10 is 120 cfm at same face velocity and proper spread and throw. I can cut in any size...but what is actually needed for the room? 1- 4x12? 2-4x10's ? 3-2x12's??


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