Forced Air Heating Fan Noise

And finally all this working together can vibrate all or part of your furnace.

Forced air heating fan noise.

The big problems typically include noise and blockage of airflow usually caused by dirt or by furniture or draperies blocking the registers. There is little that can go wrong with a forced air system. You ll still know your system is working. A tech replaced the blower motor and cleaned the fan blades a month ago so ruling out motor or dirty blower wheel.

The amount of noise depends on how much air the fans must work with how hard the fan must push the. Noise from a wheel out of balance is completely different from noise due to a restriction in air flow from a plugged coil. Although there is a grate to protect against objects obstructing your fan small twigs and debris can make its way inside. Noise forced air heating is not quiet.

The forced air furnace system is the standard in home heating. Gas burners inside gas furnaces ignite and fire as gas flows in. And since less air is moving through your ducts noise levels are lower sometimes dramatically so. In this type of system hot air is forced through a spiderweb of duct work that runs throughout the home.

Noise occurs when the fan blows the air through the ducts. A forced air system is also efficient for distributing cool air from a central air conditioner with the same ducts registers and blower. Metal air chambers such as your furnace plenum and attaching duct work all contain fast moving warm air. In this video this old house plumbing and heating contractor richard trethewey explains how to quiet a noisy forced air system.

Mark center of start collars on the return and supply side of the heating duct. It eventually passes through the vents to heat the entire room. The fan speed varies depending on the cooling or heating load but the fan operates at lower speeds most of the time. After all it s pretty obvious whether you re comfortable or not.

Cut holes in sheetmetal ducts using a drill fitted with a circle cutting jig. The motor for the blower makes noise as it works to spin the fins which get air moving.