Iím planning to have central air installed this summer and have a few questions. I have a 15 year old, two story colonial thatís 3,000 square ft. It has a Carrier 58PAV111-16 furnace thatís the same age as the house. The furnace is located at one end of the house and, due to patio & landscaping, I would like the A/C unit located at the other end. The distance between the units would be approximately 70 ft.

- Can anyone tell me if there is an issue with such a long run between the two units?
- Am I setting myself up for trouble down the road?
- Would there be a huge price increase for materials with this design?
- Will my Carrier furnace support the addition of central air or will I need to replace it?