As we're in the super hot part of the summer I'm sure a lot of people are finding that their AC can't really keep up. I can see that yesterday my upstairs AC unit ran solidly from 4pm until almost 10pm before it started to cycle again, but the downstairs unit maxed out at less than 80% duty cycle during the same period. And this is with the thermostat upstairs set 2 degrees above the one downstairs. I know that this is normal to a point, more heat gain upstairs but I get to thinking of solutions
The downstairs return is in a joist space that runs open up to the second floor. It shouldn't be that big a project to extend the return up to the second floor and put in a second smaller filter and return duct there. I'm sure the guys that maintain my AC would be happy to do that. But would it help any? Or would it just make the downstairs that much less comfortable? The 2 areas aren't isolated both returns are basically in the 2 story open living room, but one on the left side on the second floor, and one on the right side on the 1st floor.
Is this a good idea or a bad idea or don't you think it would make any appreciable difference at all?