Hot answers tagged hvac
You would be far better off building a roof type structure over the window well that is well above the window well and projects far enough out around the edges of the well that rain water does not enter the well. Trying to jury rig a scheme to keep an existing lid open "just enough" sounds like a recipe waiting for disaster. Either it will be left closed ...
You are correct the refrigerant is not a consumable. If a system is low on refrigerant, then it has a leak. The technician should have a "sniffer" tool that can detect refrigerant leaks. If they didn't use it last time, then they were irresponsible. Also, refrigerant is expensive so that attitude of "if it gets low again then we know you have a leak" is ...
I think I'd suggest looking for alternatives which don't involve that window well. Perhaps a ducted A/C would let you install the ducts through the wall above the sill (as you would a dryer's output).
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