On Wed, 26 Aug 2009 16:33:57 -0400, "desgnr"
wrote:

In Pennsylvania a 1500 sq. ft. 2 story house.
26 years old.
Gas heat pump installed now.
How much would it cost to have a new heater & central air conditioner
installed.
Asking because i am thinking about buying this house & it doesn't have
central air.


Find a good local tech. Have them take a look at the house.
There are big differences from one istalation to another. I would not
trust any estimate made without a in person inspection first. In
addition, you will want a good professional to do the work as the
design of the instalation and the actural instalation is far more
important than the hardware that is installed. No good installer is
going to recommend second rate hardware.

In other words, no one here is going to be able to offer you
an accurate answer to your question.