Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
Speaking from experience - we had a central A/C system installed on a former residence of ours (SFH in Sunnyvale). No roofwork was needed. Had heating ducts so it was pretty straightforward. Compressor, as others mentioned, was installed on the ground, outside the house.
Do you recall about how much this cost you? Just a ballpark is fine. Thanks.