Which way should air registers face?

The standard practice is to position these vents so that one can’t see through them to the ducting beyond. So, return vents closer to the ground should be oriented pointing downward. Conversely, return vents closer to the ceiling should be oriented pointing upward.

Should vents face up or down?

Aim it upwards. In homes with central AC, vents are typically on the floor pointing upward for the reason you mentioned. You want to displace the hot air up top and hopefully get a current flowing. Blowing to the floor will not give much incentive for upper air to flow.

Why are vents in front of windows?

A floor vent is supposed to create a “wall” of heat in front of windows. They’re there for a purpose. Keeps the coldest part of the room warm.

Where should I put my return and supply ducts?

They must be correctly placed and unobstructed —Return ducts are usually placed in hallways, under stairwells, or in larger open areas of your home. This placement ensures that they will be able to pull in enough air to take back to the HVAC equipment.

How do I aim my AC vents?

The best option with any ducted heating and cooling system is to keep your vents open at all times. This allows optimum air flow for the highest possible energy efficiency. If you want to direct air away from a wall or corner, you can adjust the fins so they’re slightly slanted toward the room that you’re in.

Where should heat registers be placed?

Registers should be placed in the middle of the external wall (in the floor or low on the wall); if there are two external walls, both need registers in the middle. (If the room is tiny, one duct may work, even if there are two external walls.)

Can you have too much return air?

No, an air return cannot be too big, except in extreme cases where a closed room is temporarily under negative air pressure. Return vents maintain air pressure, filter out debris, and are critical to the efficient operation of any HVAC system.