2 ton
Courtesy from godfather heating and air conditioning San Antonio
Two tons, indicated by the 24 in the model #. 1 ton = 12000 btu, 2 tons = 24000.
10 SEER is the rating for the Goodman CK24-1B.
I found several sites that have these manuals by searching for a componet number for that unit. The link below has the install PDF and the parts PDF. The links are in the lower left of the page. http://site.famousparts.com/goodman/CK12-CK62.html