I have a 12 yr. old house, 2 stories, cheaply built. I replaced the air conditioner (thanks for the advice, btw, got the Trane Puron). I am not willing to add zones to get the upstairs to be cooler because I won't be in the house more than 3-4 years and I won't get the return on my money when I sell. I've closed off the room vents to get the upstairs cooler (the downstairs is great!), but there's still a lot of air leakage, and noise, from those vents. Can I block them with plastic wrap, or those magnetic covers to get more cool air upstairs? I have ceiling fans in a couple of the rooms, upstairs and down, and have run the blower non-stop but there is still a big difference in air temp between the 2 levels. Any other advice or should I just crank the downstairs to arctic in order to get the upstairs livable? I am going to get the AC installer back out here to see what he says also.
Thanks, mcnick