Yes but you will probably have to install a service port.
Yes, window air conditioners require refrigerant, which is often referred to as Freon, for operation.
Depends on the size of the unit and how bit or small the compressor is. There will be labels that will tell the technician how many pounds to capacity for Freon.
The most common for vehicles are R-12 and R134a freon.......... The most common for homes are R-22 and R-410A freon..........
Gas used in air conditioners are: R12 freon is dichlorodifluoromethane R134a is Tetrafluoroethane
No, it is not possible to recharge window air conditioners as they do not use refrigerant like central air conditioning systems.
freon?
Modern wall air conditioners usually do not need any coolant replaced during the life of the air conditioner.
The different types of air conditioners available in the market include window air conditioners, portable air conditioners, split-system air conditioners, ductless mini-split air conditioners, and central air conditioning systems.
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Freon gas is used in refrigerators, air conditioners, ovens and all other types of these things.
Yes you need freon if you own a heatpump, with a furnace/oil burner you could do without the freon.
Window and wall units