Any Remedy For Noisy Heat Ducts?

[Ron]

I am a newbie and this is my first post.

Moved into first ever manufactured home a few months ago and it has a very annoying problem. Noisy heat ducts. Home is a 1995 Golden West super good cents with forced air electric heat. The underfloor heat ducts are rectangular ducts that appear to be aluminum. Two ducts run the length of house - one under each side of double wide.

Shortly after the heater starts to run- cracking and popping noises start throughout the house. And for a time after the heater shuts off - the cracking and popping noises continue. I am assuming the cracking and popping noises are due to expansion upon heating and then contraction on cooling of the aluminum heat duct and possibly a portion of the subfloor (?) the ducts are attached to.

Is there any remedy to stop the cracking and popping short of replacing the ducts with a different material?? Since this is a super good cents home the underside has thick insulation encasing the ducts with a membrane holding up the insulation. Biggest concern I have with replacing the existing ducting and/or way it is attached to subfloor- is getting acceptable job done putting back the insulation and repairing the membrane.

Any help out there for me??

Thanks!
Ron

[rmurray]

Outside of changing duct work and ear plugs, I cannot think of a solution...I hope this post will make folks looking to buy aware of the facts that construction feature matter..There are home built with fiberglass ducts that will not ever have these problems..

Changing all the ducts can be expensive...A HVAC professional should be able to handle this project without a problem....An added benefit might be better energy efficiency...Metal ducts are prone to leaks and they are not the best for energy efficiency in the first place..