I am looking into installing central air in my parents' home and have been told by a contractor that the installation price will go up by about $2,000 if I wait until after July 16th because of some new regulations. (I live in Massachusetts, not sure it this is a state or federal reg.) Does anyone know if or why this is true?

Also my mother has respiratory problems and I was thinking of putting in a whole house air cleaner. Should I have this installed at the same time as the central air?

Any recommendations you have on which type of air purifier or central air unit is the cleanest or best would be greatly appreciated.

Sorry for so many questions