Sound absorbing material?
My furnace/ac is in a small hallway closet designed for it.
Below it is a fairly large air return cavity.
What's a good board or sound absorbing material for attaching to the studs down there? Obviously I don't need material that absorbs low frequency.
I've visited some sites where they want way too much for their material.
I can afford more than inexpensive 4x8 sound board tho.
You could try this-
or this one-
Cut it with a duct knife to size and use spray glue and tacks to hold it in place.
Last edited by socalhvacguy; 07-16-2008 at 03:39 PM.
Reason: added link
you can check this stuff out
bloody expensive tho
the other option is a lot cheaper. You insulate the wall with fiberglass insulation, then hang 1/2" wood fiber board (your local Drywall or roofing supply store will have this), then hang 5/8" drywall over the top of the wood fiber.