Can you vent AC into cold air return?

You’ll lower the humidity of the entire building, but one room will be cold with the rest being slightly warmer. So to answer your question, yes you can vent a portable AC unit wherever you want to indoors, as long as you don’t care about pushing heat there.

What happens if you block the return air?





Blocking air return vents causes your system to work harder, as there is less air flow to move the air back to the furnace. This continued strain on the HVAC system can lead to a decrease in performance and more HVAC repairs down the road.

Is return air same as exhaust air?

Exhaust duct systems are generally designed to convey contaminated air from industrial process and work spaces to the outdoors, while return air systems are generally designed to circulate “spent” air through a conditioning unit for reintroduction back into the conditioned space.

Can you put anything in front of an air return vent?

Home Inspection Insider explains that an air return vent needs 6-12 inches of space in front of it, and recommends that you do not put large, bulky furniture like couches and bookshelves in front of an air return vent.

Do you need a cold air return in every room?

While it is a myth that air return grilles are required in each and every room in the house, it is definitely necessary to have more than one of these grilles installed at strategic places in the house. The most important place to have these would be the bedroom.

Can I block a return air vent?





It’s important not to block your return air vent because your HVAC system needs constant return air to work properly. Blocked air return ducts will cause your system to lose energy efficiency and cause premature failure of your HVAC system.

Should I put a filter on my cold air return?

It is generally recommended to have a filter in every return duct. Filters protect the HVAC equipment and capture plenty of particles that would otherwise end up in the air that you breathe.

Why is my return vent so loud?

Since the air return sucks air, they are prone to getting clogged, especially if your home is particularly dusty. When vents or ducts are clogged with dust and debris, the result is reduced airflow which can cause annoying noises.

Where should a return air vent be located?

Return air vents are generally located near the center of the homes. Older and newer homes often have one register per floor, but homes built from 1960-1990 may have a cold return air vent in each room.

What is the purpose of return air vents?



Return vents: What is a return vent? These vents suck the air from each room and send it back to the air conditioning or heating system. Return vents tend to be bigger than supply vents, and you won’t feel any air coming from them. When an HVAC system delivers air to a room, it increases that room’s air pressure.

What does a return vent look like?

You can identify return vents by turning on the system fan and holding your hand or a piece of paper up. If the paper is pulled toward the vent or you feel a suction effect, it’s a return vent.

Why is cold air coming out of my return vent?

So why is cold air coming out of your vents? It is most likely a leaky duct system—but you should have your home’s heating efficiency checked out by an HVAC professional.

Why is cold air coming out of my vents when the heat is on in my car?



Low Coolant Level



The coolant (usually a mixture of water and antifreeze) in your engine doesn’t just work to keep the engine from overheating: It’s also the source of heat supporting the heating system. If there isn’t enough coolant in your system, the heater core will blow cold air into your car.

Why is my house so cold when it’s warm outside?

When the thermostat reads warm but the air feels cold, a number of issues could be at play. Your house could be cold due to an old air filter, a faulty furnace, improper insulation, or leaky ductwork. The simple fixes, like replacing an air filter, are relatively easy to complete.

How do I fix cold air coming out of my vents?

How to Keep Cold Air Out of Your Vents

  1. Install insulation. Poor insulation causes rapid cooling of the air as it moves through your home. …
  2. Check connections. Over time, the connections in your ductwork can come loose. …
  3. Update your HVAC. Older HVAC systems are less efficient and require more upkeep than modern models.

Oct 18, 2016