I am a frustrated home owner that needs some advice. My heating/AC unit is pulling air through my return, which is on the first floor, but is also pulling in air through the basement from the opening for the filter. I have a somewhat wet basement. My sump pump is always going off and there are some damp areas. I have a dehumidifier going to help control the dampness but the air smell and quality is still not great.
My question is, can I seal the entire vent from the return all the way to the furnace/AC including my filter access? I can use aluminum tape and insulation for the vents but how do I deal with the filter issue? I would need access to it obviously but want to make it air tight.
Any suggestion would be greatly appreciated.