What, its too much trouble to let the fresh air come in and let them breathe?

Use the covers for bird feeders and put up a sign that says, "Excess heat can damage these circuit cards, do not block air flow."

You look like the brilliant technician for keeping the eqippment running and the birds will love you.

Gee you can make things really simple or not.

THE Bracha, old blond specialist in Rube Goldberg solutions.