It depends on the size of the coils and length of the lines.
A car uses 2 lbs on average, so when you look at the size of a house and the length the lines have to run 5-10 is possible.
5.1 Lbs
I just had 2 pounds of Freon added to my central A/C and was charged $30 a pound.
Your 1993 Ford Taurus air conditioning system has a Freon capacity of 5.5 pounds. You should never overfill the air conditioning Freon.
overcharging a central air unit system with refrigerant(freon) will cause the head pressure to be?
yes
low on freon
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.
Actually no technical skills needed to check the Freon level. Home central air conditioners have a Freon scale on it. One just need to read the scale and determine whether the level of Freon is sufficient.
3.0 pounds or 48 ozs. for the dual air (front and rear heat and A/C)
brazing
The air conditioning Freon capacity for your 1999 Chevrolet Tahoe is five pounds. The manufacturer recommends that you never overfill the air conditioning Freon.
The amount of Freon (or refrigerant) in a home air conditioning system typically ranges from 2 to 15 pounds, depending on the size and type of the system. Smaller systems, like window units, may contain around 2-5 pounds, while larger central air conditioning systems can hold 10-15 pounds or more. It's important to check the manufacturer's specifications for the exact amount required for your specific system.