Taping them up will not cause any damage to the system. You might want to think about getting a window fan, window AC or portable AC unit. Running these would give you a pressure increase that could cancel the air flowing into your unit from these vent if you untaped them.

Is it OK to tape over a vent?

Whether you tape it or otherwise block it, the effect will be the same and it will not cause any damage to your system; it would be no different than if there was a standard register there that was closed. Unlike duct tape, this will not dry up and will hold the seal. – zk.

What happens if you put something over a vent?





Placing wood furniture on or too near air vents will almost certainly damage the wood. The forced air is very drying and could cause joints to loosen and boards to crack. If another piece of furniture is blocking the vent, exceptionally moist conditions in the room might cause wood furniture to warp.

Can I cover my vent with duct tape?

Once the tape fails, it no longer seals ductwork leaks and you lose heated and cooled air through these holes. What’s worse, using duct tape on ducts could violate local codes. The International Energy Conservation Code (IECC) proclaims that any tape used on ductwork must be labeled by the Underwriters Laboratory (UL).

Can covering a vent cause a fire?

Fire Hazard



Perhaps the most obvious (and most dangerous) result of a blocked vent is that it will cause a fire.

What happens if you block an air vent?

You could damage your heat exchanger



There will inevitably be a buildup of air pressure if you block the airflow from your vents. This leads to issues with your heat exchanger — it will crack and could potentially emit carbon monoxide emissions.

Can you cover an air intake vent?





It’ll eventually kill your A/C system.



Keep couches, chairs and other large pieces of furniture at least 10 inches away from your cold air return vents. Avoid covering your cold air return vents with curtains, drapes or rugs. Always check your air filters and replace them when needed.

Can you cover a vent in a bedroom?

You will probably see one of two things – a gap between the inner and outer skins of the walls or the equivalent to a duct to the outside. If there is a gap between between both skins then you should be ok to cover up the inner skin. if it is the equivalent of a duct then I would block up the outside as well.

Can you put a couch over an air vent?

It is best practice not to cover vents with furniture. If you place furniture atop a vent, it may dry out the wood and damage your expensive sofa or armoire. You may also cause your furnace or air conditioner to work harder, resulting in a higher utility bill or premature wear to your system.

Is it OK to put furniture in front of a 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.

How do I block a room vent?




Quote from Youtube video: First we will remove the vent cover from the wall clean the vent and allow it to dry. Use great stuff to insulate around the dot. Work. Model phone to drive for about an hour the trim the excess.

Can you put cheesecloth over air vents?

If you window air-conditioning units rather than central air conditioning, one good idea is to cover the vents with cheesecloth: it will help filter out pollen.

Are plastic vent covers safe?

If these vents fall or are blown from a roof, they can cause serious injury. Plastic ones are designed with smooth rounded edges and being lightweight they’re less likely to cause damage.

Should you cover your vents?



1. It obstructs the air flow within the system. Your system won’t know that a particular vent is closed and will continue to push air there. This can cause increased pressure which can damage the system.

Is it OK to close off vents in unused rooms?

EXPERT RECOMMENDATION: If you want to try to balance the airflow throughout your home, you should not close vents completely; HOWEVER, you can close them slightly (not more than 75% closed) to help distribute air better to the areas that need it most.

Can closing AC vents cause mold?

When you close any of your HVAC system’s registers, condensation occurs due to lower surface temperatures in those unused rooms. The result is mildew and mold growth, which you’ll likely smell before you spot it.

Should you close air vents in winter?

Air vents should be open to prevent damage



Increased air pressure can create cracks and holes in the ductwork. It can also cause your furnace’s heat exchanger to crack. Leave all air vents open to prevent extensive damage to your home’s heating system this winter.

How do I stop noise coming through air vents?



How to Soundproof an Air Vent (6 Ways to Reduce Noise)

  1. Block Off the Air Vent Entirely With Drywall.
  2. Fill the Opening With an Acoustic Sealant.
  3. Cover the Vent With Soundproof Curtains or Blankets.
  4. Make a Sound Maze Inside of the Vent.
  5. Stuff the Vent With Acoustic Foam.
  6. Plug the Vent Grate.


Can hear sound through vents?

So, the question arises, can you sound-proof an air vent without messing up with the air flow? The simple answer is: NO. Air is the primary carrier of sound, and every soundproofing material will restrict the airflow in one way or another. A final place is much quieter than an open one.

Why are my vents so loud?

Vents can make loud whooshing noises if the supply air ducts are too narrow. Debris can also block the ducts or cause one or more vents to close. You can use a flashlight to see if the vents look too dirty. However, you’ll need to reach out to an HVAC contractor if the noise persists.