Cost of Air Conditioner Installation in Pennsylvania$4,122.52 for 2-3 ton unit (using existing ductwork) (Range: $3,560.08 - $4,684.95) Free Estimates from Local ProsCost of Whole House Humidifier Installation in Pennsylvania$400.88 for mid-grade central humidifer (flow-through) (Range: $367.97 - $433.79) Free Estimates from Local ProsCost of Central Air Purifier Installation in Pennsylvania$1,117.89 for a typical two story home (standard grade unit) (Range: $940.38 - $1,295.39) Free Estimates from Local Pros |