10/18/2023 0 Comments Airflow system home air force![]() Finally, there are typically small dampers inside most round heating ducts in the basement that often escape the scrutiny of the average person. Checking these visually, or removing the registers and holding them up to a light, should reveal whether they are opened or closed. Sometimes these are mostly shut, to the surprise of oblivious homeowners. The registers in most rooms should have adjustable dampers, which are normally easily opened or closed to regulate airflow. ![]() Visually inspecting all the ducts in accessible areas like the basement should reveal if this has occurred and repairs may be as easy as reconnecting loose ducting.Įven more likely than loose or squished ducts are closed registers or dampers. Also, ducts can become damaged for the same reasons, which may significantly reduce the airflow if they are crushed. If these are the ducts running to the upper floor of the home, that is the answer to the mystery. If the basement has been recently finished, it is possible that installation of the ceilings or walls has caused one or more ducts to come apart. Most ducts are held in place with small screws, duct tape, or brackets. It is unusual, but certainly possible, that some ducts have become disconnected during construction or renovation of the home. The second location to inspect when a low volume of air is detected at several registers in a home, but not others, are the ducts. The good news is that the solution should be an easy adjustment - to boost the blower speed, by a licensed HVAC technician. In that scenario, there may be a high enough volume of air to provide reasonable flow at the lower levels of the home, but not the upper floor. I have recently seen several newer furnaces installed that appear to be set on a very low speed when the heat or air conditioning is on, when it should be at maximum. ![]() Whether this is at the request of the homeowner or the discretion of the technician may be unknown. Because of this, some installers may not set up the furnace fan to run at the highest speed possible. Many newer furnaces have multiple speed settings for the blower, or may be variable-speed models. ![]() So, if the airflow seems to have less velocity or force than previously, it may be the settings rather than the physical structure that is at fault. That is because the blowers on modern high-efficiency furnaces are better designed and typically more powerful than older models. The furnace itself may seem like the obvious culprit, but it is rare for an upgraded furnace to worsen the heat distribution in a home, rather than improve it. There should only be two places to look when investigating poor airflow from a forced air heating system. This can often be part of a standard annual servicing. Determining which to choose may require an evaluation by a licensed HVAC technician. How can I increase the airflow to the upper floor?Īnswer: Increasing airflow from your forced-air heating system may be as simple as adjusting some dampers and registers, or it may require professional modifications to the furnace. The vents are closed in the basement, since it’s not used as living space. If I keep the bedroom door closed during the day, I will notice at least a 10-degree difference in temperature. I’ve noticed that the basement and main floor receive a lot of heat and air conditioning, but the upstairs does not get much air force out of the vents. ![]() Question: I had a new furnace and accessories replaced four years ago for my two-storey home, built in the 1980s. ![]()
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