Hi -
I am on 1st floor of 3 story condo building and AC unit is on the roof (4th floor). My unit is 1100sf. I was wondering amount of freon it will take to fill the empty CKL30-1E? Someone quoted me 15 lbs with $25/lbs.. Please educate me on how the capacity should be calculated? Floor to ceiling inside the unit is 9' (108").

Your help is greatly appreciated.

The unit has a charge on its nameplate that is for the unit. Than there is more additional charge needed for each 15 feet of lineset. 15 pounds could be close but hard to say. And $25 a pound is not bad. In my neck of the woods r22 is going for $60 to $125 a pound.

Yes, there should be a factory charge rating on the roof top unit nameplate.. However, after fifteen feet, the charge needs to be adjusted per foot of extra lineset. If you can tell me the factory charge, I will try to give you a close estimate of extra lineset charge. Its usually around .6oz per foot over 15 ft. And you are getting a pretty good deal on r-22, as the price is way up and will keep going up.

the unit has a charge on its nameplate that is for the unit. than there is more additional charge needed for each 15 feet of lineset. 15 pounds could be close but hard to say. and $25 a pound is not bad. in my neck of the woods r22 is going for $60 to $125 a pound.

Thanks for the information. It makes sense why I was quoted for the amount. Unit name plate alone has a charge of 70oz ~= 4.5 lbs. Since my AC is on 4th floor, and I am on first floor. I do agree that I was quoted way less then what others were asking, not to mention their consulting service charge was way reasonable then others. I was curious to find out how the caculation works.

Have a good night.

Thanks to both "siberianair" and "mygirlsdad77", I am better educated today then I was yesterday about HVAC maint.

It is hard to find a reasonable, and honest businesses but I sure have hit the jack pot. Just to put the things in perspective, I was only charged $38 for the service call, only (wow) $20/LBS for the R22 (after quoting $25), and explained everything exceptionally well.

Once again, thank you both for the kind reply!

Have a good night.

GustyWind it seems that in today's world you got a good deal. The markup on refrigerant has never been an exact science and that allows the what ever the traffic will bare clause to be put in operation. 15 lbs or R-22 seems to be way too much for your system but I am sure he used a electronic scale and provided you with a digital or paper scale read out for the refrigerant usage charge. I also hope the service person fixed the leak that caused the high refrigerant loss or he will be back to fill your system again.