The price to install central air conditioner units with heating unit is between $6,500 and $15,000. The HVAC installation costs are for complete heating and cooling system and labor cost.To get little more accurate price in your area, check out the links below.f you’re planning to buy air conditioners with higher seer rating and more Ton the HVAC price will be higher than this. Central ac units with 5 tons and 18 seer rating would cost about 3 to 5 grand or even more. This is just air conditioner units. It does not include the heating units.