I bought a Sharp 18PMT indoor PHT Outdoor ..1.5 ton AC yesterday, in my house the fitting for AC was already in place...I asked the dealer if that would make any difference before buying the AC; he said it doesn't make any difference, but when the guys came to install the AC they first said that it would require welding and they will Install the AC ...and later they said the fitting has been done for Hitachi and OGeneral and Dankin ACs it would not fit for Sharp. Please suggest what should be done? Shall I return the AC back and go for Hitachi, or there is a way around? Thanks !