The only way to stop smoke from entering through a vent is by blocking the vent.
Prevent heat coming through vents in floor.
Still let s go through some ideas on how you can reduce the noise coming through your air vents.
Return air vents suck in conditioned air from your living space and cycle it through the furnace to supply freshly heated air.
Popping noses from the ducts may be relatively easy to solve with a little effort on the part of the homeowner or they may be more complex in nature and require servicing such as cleaning or insulating the ducts by a qualified heating and air conditioning.
If you block the heat register the return air vent is left with cold.
Because the easiest and most effective solutions to stop noise from coming through air vents involve closing off the holes entirely i ll start by suggesting 3 ways to do that.
Secure fine wire mesh over these gaps to prevent mice from entering.
Replace the grates over each heating vent and turn your system back on.
You ll want to check the vents about once a day.
Hardware cloth will keep out bugs but mice will chew.
6 best ways to soundproof an air vent.
To prevent mice from getting back inside your vents try using a layer of stainless steel mesh.
The inside of the vent may be damp and dirty and that may be why the ants were attracted.
Check your roof and wall vents for gaps between the duct and the wall.
If moisture is a recurring problem you may need to insulate the vents.
This will also help control mold.
Once the ants have disappeared use soap and water to clean dirt from the vent walls as far in as you can reach then dry the walls with a rag.
If the mice persist you may want to call a professional exterminator.