My neighbor informed me that they had just bought a furnace, cond, and cased coil. The neighbors mom works for a wholesale house and supplied the equipment. So I take a look at it. 100k furnace and 2 ton cond for 1700sq. ft. whole house. I said that the furnace looks to big and that I should do a load calc. for him. Ht loss = 46892, ht. gain = 16583. He is going to exchange the furnace. Now he wants to know if I will install the new stuff. What would you do? I hate these situations. Whould you charge your normal rates, and how do you make up for the lost income on equipment? Uuuuggggghhh....neighbors. I guess im hunting for acceptable guidelines. Thank You!