Cold air return vents aren't the most elegant feature in your home, but they exist for reason. These vents, commonly found in hallways or on ceilings, are absolutely essential to an air conditioner's well-being. Cold air returns take in warm air from your home's indoor spaces for use in your air conditioning system.Also, do you need a cold air return in every room?
DEAR TIM: Ideally you want to have cold air return registers in every room. If you can't easily install a true cold air duct back to the furnace from each room, you can sometimes fake it. You can install a cold air return register above the door from each room that connects to the hallway.
Similarly, do basements need return air vents? Hot air heating systems function best if there is at least one cold air return on each floor of the house. Essentially, that allows the warm air to circulate better. The basement is no exception to the rule. Cut into the cold air return that is on the ceiling and drop a duct down to the floor.
Similarly one may ask, how important is a cold air return?
The answer may be your return air grills- also known as “cold air returns”. These are the vents that are usually on the wall and they do not have a control mechanism to open or shut their flow. Their purpose is to allow air to return to the furnace to be heated or cooled.
How much cold air return do I need?
There typically are as many supply vents as there are rooms in a house. There usually are fewer return vents, but they are much larger. A typical supply vent is 4 by 10 to 12 inches and a typical return vent is 16 by 20 inches or larger.
Can you have too much cold air return?
While there is no such thing as too much return air for the equipment (actually, there is, and it causes fan cavitation, but very rare), this CAN be an issue for the house. It has the potential to throw off pressures in different areas of the house.Should you close doors in unused rooms?
Should You Close Doors in Unused Rooms. In short, the answer to this question is no. Although closing off unused rooms may seem like a way to save energy on heating and cooling, it can actually force your HVAC system to work harder.What happens if you block a cold air return?
Blocking your cold air returns, whether intentionally or by accident, can be disastrous in more ways than one. Here's what could happen if one or more of your returns are blocked: It can cause the evaporator coil to freeze over. The evaporator coil's job is to absorb latent heat from air flowing over the coil.Can you put a cold air return in a closet?
Can a cold air return be in a closet? I have 2 bedrooms next to furnace room and I don't want to place the return that close to the furnace and was hoping the closets would be ok for the returns. No, it is a code violation. No return allowed in a closet.How high should a cold air return be off the floor?
If you are air conditioning, in some cases, a high return on upper floors is good because it sucks out the warm air and allows the cool air to fill the room. A low return on an upper floor will suck out the cool air, leaving the warm air to statify above depending on the location of the supply.Should return air vents face up or down?
Supply air from furnaces and air conditioners should be on outside walls. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. If the supply ducts are in the floor, then the return air should be located up high. This pulls the air across your body.Should cold air returns be open or closed in the winter?
In the winter you want the cold air to be drawn through the return registers leaving the hot air behind. By opening the lower registers and closing the top ones you keep hot air in and draw the cold air out. Since cold air is heavy it will automatically flow down to the lower register.Does a furnace need a cold air return?
In order for your furnace to run efficiently and your home to heat evenly, this airflow must be in balance. In other words, the amount of air that your furnace “breathes in” must equal the amount of air it “breathes out.” Cold air returns are what allow your furnace to “inhale” your home's air.Can you put furniture in front of an air return?
Air return shaft accessibility Wherever the return shaft is located for the HVAC system, you should take care to keep it accessible. Many homeowners place furniture in front of air returns located in walls, forcing the unit to work harder to obtain air, and thus reducing how much air is pumped through the unit.Can a cold air return be in the floor?
If you are in the far north, or in the Southern US, the answer is simple. In an air conditioning climate the return duct goes near the ceiling to draw off the hot air and cool it down. In a heating climate, the return duct goes near the floor to draw off the cold air and heat it up.What will blocking a cold air return do?
Blocking the return air supply to the air handler or blower compartment reduces the amount of air that flows easily into the system. The fan's speed won't slow any more when you close off the returns, and it creates positive air pressure.Can you block a return air vent?
What Happens When A Return Vent Is Blocked? Very similar to blocking a heat register, blocking an air return vent restricts the air flow in your home. Blocking air return vents causes your system to work harder, as there is less air flow to move the air back to the furnace.How do I know if my cold air return is working?
Test Your System Try this simple test when your HVAC system is running: get a piece of tissue paper and dangle it about six inches from one of the return vents. You should be able to see it being gently pulled towards the vent. Next, place it up against return vent and see if the air suction holds it in place.How do I install return air in my basement?
The proper method to achieve what you want is to install one or more ducts directly to the existing return air ducting or plenum. These should run to one or more locations near the basement floor, but farther away from the furnace.Why is my finished basement so cold?
Basements are inherently damp places, even if you don't have active sources of water. Cool temperatures plus humid air makes one feel cold. Humidity can create other problems, as well. Cold foundation walls subjected to 20 to 30 percent relative humidity will cause condensation, which can lead to mold, mildew, and rot.How do I circulate cold air in my basement?
Keep your basement door open to easily allow cool air to enter the rest of the house. Install a ceiling fan near your basement entrance, such as in the kitchen near your basement doorway, to promote circulation of basement air into the rest of the home.Why is my basement so cold in the summer?
Cause #2: Humidity During the hot, humid months of the year, condensation can also form on the walls and floor of your basement, adding to the indoor humidity. Humidity combined with cold temperatures makes you feel colder. 
