[bob deluke]

Usually indoor coils don't go bad. Should be able to reuse it with new outdoor condensing unit. Rule of thumb: 800 s.f./ton of cooling. Well insulated home, about 3-31/2 tons. If indoor coil is larger than condensing unit, will have more dehumidifaction capacity. No need to change if within a ton rating. Usually installers match indoor coil/condensing unit to be same value. Slab or a coil on furnace? Cost of condensing unit about $1200-1500 per ton, based on seer. Higher seer, more efficiency, more cost. Difference in seer is based on condenser coil size. Larger coil=higher seer, more $$$. Goodman is at bottom end of hvac equipment. Carrier, Trane, York, Heil are high end.