I recently moved into a home that has ductwork to 7 different rooms and

connected to that ductwork are both an evaporative (swamp) cooler and a

forced air heater. I fear I'm losing a lot of heat through the swamp
cooler. I've got a cover on it, but I checked it out today and the
cover was pretty warm (on my roof in 30 deg weather) and bulging out
from the air (I tied a couple straps around the cover) .

What can I do? I feel like I need something that will cut off the duct

from the swamp cooler to the rest of the system. Is that possible?
Expensive?


Thanks,


G