how much should a new hvac system cost
1 For a 1,000 square foot home, the cost of an HVAC system is $6,000 to $12,000, including a new furnace, air conditioning unit, and ductwork.2  For larger homes and more complex setups, however, the price could be significantly higher. For central air-conditioning, youâll pay $3,000 to $5,000 and up for a 2,000 square foot home. 2  A new furnace in a central heating system costs $2,500 to $7,500 or more.