Double or single flow floor registers..

grantiman

Have a small new build, trying to figure out which floor registers to use. I see they have single flow where the heat blows upwards, then they have double flow where the heat blows left to right. Is there a reason they have single and double flow, which would be better to use?

Jamie Hall

Too many variables. It depends on how big the room is, where the registers are to be place, any furniture…

EdTheHeaterMan

Heat rises… or should I be more correct and say that hotter air is lighter and will rise to the top of the room, while cooler air is heavier and fall to the floor of the room.

The general logic is to have the warm air flow across the floor so it can rise and the room will have a more even temperature from top to bottom. If you are delivering cooled air, then you want to push the air to the top of the room and have it settle down thru the room. After that air hits the ceiling and flows across that ceiling, it will fall to the floor by its own weight causing the air temperature in the room to be more even from top to bottom.

If you have a combination heating and cooling system, then you can select either and live with the wrong register for the other season.

Ironman

Unless you have very high ceilings, I don’t think it’s gonna really matter either way.