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.
I just had 2 pounds of Freon added to my central A/C and was charged $30 a pound.
5.1 Lbs
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
Your air conditioning system holds approximately 5 pounds of Freon. Most recharge kits come with a gauge that will tell you exactly how much Freon to put into the system.
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.
brazing
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.
3.0 pounds or 48 ozs. for the dual air (front and rear heat and A/C)
The air conditioning Freon capacity for your 1999 Chevrolet Tahoe is five pounds. The manufacturer recommends that you never overfill the air conditioning Freon.