Furnace Fan Noise Reduction

Train noise coming out of furnace.

Furnace fan noise reduction.

Or if you have the space for it build some baffles out of 2x4 acoustic ceiling tiles inside the return chamber like below. Fiberglass duct liner absorbs noise and contributes to indoor comfort by lowering heat loss or gain through duct walls. Sound damping melamine installed right besides the blower in the furnace. A properly functioning furnace shouldn t make too much noise especially after initially starting.

Installing an acoustic rubber pad under the furnace specially if it is sitting on concrete will damp the vibration you hear through the pipes although the blower fan and motor are the most obvious parts to check take a look at the complete unit. Use a wire mesh to make the sheet. One that is generally needs repairs and the type of sound you re hearing can help determine the exact issue with the system. While the motor and fan inside your furnace makes considerable noise you don t exactly want it to sound as if you re standing next to a train when you go up next to it.

The in line noise muffler will not only reduce the noise from the fan but noise from other rooms that travels through the ducts. This had a noticeable sound reduction effect since it cuts the noise right where it originates. Follow the following procedure when building sound insulation for the furnace. Furnaces generally aren t noisy and most modern furnaces are designed for noise reduction.

Make sure that your furnace filter is clean and isn t restricting airflow by being dirty. For effectiveness use the foam next to the blower intake. I used to measure in the furnace room at a distance of 1m from the blower door 62dba and after installingthis foam it went down to 58dba. Video of the day volume 0.

There are many ways of reducing noise through the duct work but the easiest and most effective method without restricting airflow is installing an in line noise muffler.