How big should a return air vent be?
A typical supply vent is 4 by 10 to 12 inches and a typical return vent is 16 by 20 inches or larger. Houses often have two or more return collecting points, each with a filter, which join before re-entering the heating unit.
Can you have too much return air?
You really cannot have too much return air. Too little return air is a problem, but not too much. If you restrict the return air, it could cause problems with short-cycling of the furnace.
Does a return air vent need a filter?
Your AC system should have a proper fitting filter on the return side. By placing a good fitting, high quality filter on the return vent, you will remove particles from the air before they can enter the AC system. A good filter will keep your air handling unit, coils, and ducts clean.
Do vent filters block air flow?
The biggest drawback of vent filters is restricted airflow. Filters slow the passage of air. As particles build up on them, the amount of obstruction increases. This can cause your system to work harder, using up more power and potentially overheating components.
Do vent filters really work?
In short, the answer is yes. Vent filters do work, and they do fulfill their job of removing impurities from the air that enters your home through the central air system. However, they are not the most effective way to filter air.
How do you get airflow to the second floor?
An attic fan will also help circulate the air, which in turn decreases the amount of hot air that reaches the second floor. Close some, but not all, supply vents on the first floor for better circulation to the second floor. Also, make sure nothing blocks your vents upstairs, and that your air-return vents are open.
Why is it so hot upstairs but cold downstairs?
Blame physics: hot air rises while cold air sinks. That means your upstairs typically gets hotter than your lower levels, even if your air conditioner’s working in overdrive. Your roof’s hot, too: Unless you have shady tree cover, your roof absorbs a ton of heat from the sun.
How can I cool my upstairs room?
Run a fan (when you’re in the room) Turning on a ceiling or floor fan will help you feel cooler when your upstairs is warm. Keep in mind that a fan does not act as a miniature air conditioner. It will not remove humidity and pump cool air throughout your space.