Got a bid today to install this furnace and a Carrier cased coil, model no. K5-BXA-042-021 in my attic, to replace an existing Ameristar furnace & coil that wasn't done right (as previous threads have discussed) and just isn't the right furnace for the application (too loud). Got a price of $4500 to remove the existing set up and plug the new one in (ducts, drain pan, mechanical lines, etc. are all already in place and will remain).
ok i have read your other post and got the whole picture and if you are swapping out your furnace for a quieter one and because of the coil problem and they are not going to swap out the condensing unit the only thing i can say about the $$$ is wow. where do you live. you said that the unit is right behind the wall where you office is and it is loud. have you tried sound proofing the wall between your office and the unit.