I’d just shorten the duct and put it in the ceiling. It’s a matter of space and your prerogative. Ideally it’s near the outside wall to maintain comfort in cold/hot weather. If your duct rusts it’s because you don’t have (or don’t use) an exhaust fan.

Should AC vents be in the wall or ceiling?

1. Air ducts should be kept close to the ceiling. When it comes to vent placement in your house, one of the most important things to remember is that air ducts installed near or within the ceiling are often the most energy-efficient alternative.

How should HVAC vents 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.)

What is the disadvantage in having ducts in the ceiling?

Cons of ceiling vents

Exposes HVAC system to unconditioned spaces – Attics tend to be dusty and prone to extreme temperatures, which can add wear-and-tear on the equipment and increase heat transfer loss.

Which placement of air vents in a house provides the most efficient heating?

For heating, the best place to have the ventilation installations placed is on the floor. Heat rises, so having the vents on the ceiling won’t do much good for the room they’re in to heat the ceilings.

Is it better to have air vents on the floor or ceiling?





Ceiling and floor vents are equally as efficient, but floor vents can be slightly more efficient by providing less resistance to airflow. Ceiling-mounted vents generally have better cooling potential, whereas floor vents typically provide greater heat transfer.

Where should vents be placed?

Supply register vents should be in every room as well. Located on the outer walls, under windows, in the ceiling, or on the floor, placement depends on the heating or cooling system as well as the construction of the home. Supply vents help change the room temperature to your desired heat or cool setting.

How do you increase airflow in ductwork?

Increasing airflow in ductwork can be done by cleaning the air filters and ductwork. By adding inline duct booster fans and/or air dampers significantly can improve airflow in weak areas.

Why are HVAC vents under windows?

As we began to reduce our energy use, we discovered that in a heating climate, it was much more efficient to warm the window up with hot air, meeting the cold air coming down the window and pushing comfortable air into the room, and then placing our return air ducts in the centre of the house.

How do I increase the airflow in a room?



Homeowners that want to get more air in the individual room have probably already checked if the filters are dirty:

  1. If you want to increase airflow to one room, the first thing to do is to check if the air filters are clean.
  2. If you want to increase airflow, you usually have to install larger vents.

How do you redirect air flow?

Using a vent deflector is also helpful, since it can redirect vents more accurately. If there’s a room or part of a room in your home where you don’t want airflow, you can close that vent entirely by placing an adjustable vent deflector over it to limit or block the air. This redirects airflow to other rooms.

How do I even out the heat in my house?

How to Evenly Heat and Cool Your Home

  1. Check for Closed, Blocked, or Dirty Registers. …
  2. Make Sure You Have Enough Insulation. …
  3. Keep Your HVAC’s Fan Running. …
  4. Check Your Home and Your Ducts for Leaks. …
  5. Consider a Zoning System.


Why is one room in my house hotter?

First, check for these common problems: Dirty air filter—A dirty filter restricts airflow, not letting your home get enough cool air. Closed vents—Closed vents in rooms can cause them to be hotter than other rooms. Open windows—Your conditioned air can flow out of open windows, leaving uneven temperatures in your home.

Why is my bedroom colder than the rest of the house?

If there is a cold room in your house, the problem has likely been caused by dirty vents, cracked ductwork, worn insulation or faint drafts. Read on to learn how to fix a cold room in your home.

How do I balance the airflow in my home?

15 Tips on Balancing the Temperatures in Your Home

  1. Close or Open Your Register.
  2. Try a 2 Degree Offset.
  3. Check Filters for Cleanliness.
  4. Install Window Coverings to Prevent Heat.
  5. Avoid Placing Electronic Equipment Near Thermostat.
  6. Check for Drafts.
  7. Adjust Ceiling Fans.
  8. Prevent Airflow Restrictions.

Why is my room so cold compared to rest of house?



The first is to check your vents. You might have heavy furniture or items covering up your vents, absorbing all the heat. This is a very common reason why one room in a house is always cold, and it’s easily solved by simply moving the items away from your vents, allowing an unobstructed flow of warm or cool air.

Why is my room cold in winter and hot in summer?

Temperature imbalances can be caused by a variety of factors. These include blocked vents or registers, ductwork inefficiencies, air leaks near windows and doors, and unbalanced HVAC systems. We explore some of these common hot and cold spot culprits and how to reverse their effects.

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.