I have 2 AC heat pump systems. The one for the upper stair uses a heat
pump with electric heat backup. The one for downstairs uses gas. I
think both AC's freon are low after the summer, as the air from the
vents is not cool as before.
Questions: should I ask AC guys to charge them now, or wait until
spring? Are there some kind of annual contract services for this? I am
near Baltimore, with BGE as my electric and gas supplies.