How to Improve HVAC Airflow in Rooms Furthest From the Heating Unit


The placement of your heating system has an effect on how evenly the air is distributed around the home. However, once the professionals have calculated and installed your equipment in accordance with the standards established by the Air Conditioning Contractors of America, you’ll want to work with what you’ve got rather than trying to change it. Careful sizing and installation of the duct work helps to equalise the airflow. It’s possible that as the unit ages, the rooms farther away from the heater will seem colder than the ones that are closer to the air handler. According to the findings of the United States Environmental Protection Agency (EPA), inspection can discover the cause for the temperature difference; cleaning and analysis may enhance the airflow in the far-away rooms.

  1. Stop the heating and cooling system by switching off the breaker that controls it. First things first: put on your work gloves and set up the ladder.

  2. By removing the screws that hold the registers in place in the rooms that are the farthest away from the heating unit, you may remove the registers. Use a moist cloth to clean the registers, and make sure the louvres are open. Put the screws and registers to the side for the time being.

  3. Use a vacuum with a soft brush attachment to clean the interior of the duct work, taking care not to damage the duct work in the process. Use a moist cloth to clean the inside of each vent duct to the extent that you can reach it.

  4. Find your way out of your attic by following the ductwork starting near the heating unit. Check to see if there are any constraints in the duct work; these might be caused by mashing or severe bends. Adjusting the duct work such that it creates an arc rather than a right angle would correct any acute bends that may exist. Take away any things that may have landed on the duct work and reshape any parts of the flexible duct that may have been mangled. Rebuild any sections that have sustained considerable damage. In order to get air moving through the ducts, you need to make sure the heating unit is turned on. Check the duct work in the attic for any air leaks by following the duct as it travels from the heating unit to the rooms that are cooler. Check the connections between the ducts to see whether air is flowing through them when the air handler is moving air through the duct system. As you discover leaks, immediately wrap them up with duct tape.

  5. Alter the filter that is located at the return air grill, or if you have a washable filter, clean it and let it dry in accordance with the instructions. In order to prevent the dust from the project from getting into the air, you need replace the dry registers and vacuum it up.

  6. You should think about isolating and caulking the ductwork. Sealant and insulation, according to a research by Energy Star, which is a joint initiative of the Department of Energy and the Environmental Protection Agency, have the potential to enhance the efficiency of your heating and cooling systems by twenty percent.

    Things You Will Need

    • Gloves

    • Ladder

    • Screwdriver

    • Damp cloth

    • Shop or canister vacuum cleaner

    • Replacement duct work

    • Duct tape

    • Scissors

    • Filter


    If your home’s heating system is relatively new, you could still be covered by the manufacturer’s warranty. If you just moved into your house, you should get in touch with the local contractor that offers your brand of products. Inquire about the availability of an in-line air booster that can be installed in the duct.

    Regular replacement of the return air filter is necessary to prevent the collection of dust, which reduces the heating unit’s overall effectiveness.

    If you are sensitive to dust, you should always use a mask while working on the duct work.


    Before you begin vacuuming the duct work, make sure the attachment with the soft brush is secure. If the brush were to fall into the duct work, you would like to avoid having to recover it later.

    According to the California Energy Commission, turning off certain register vents in an effort to increase the volume of airflow to more remote rooms is not an effective strategy to conserve energy and is not a recommended course of action. A booster for the air supply that is installed in line is more effective.

    Closing some register vents to attempt to get more airflow to the far-away rooms won’t save energy and isn’t a good solution, according to the California Energy Commission. An in-line air booster is more efficient.