HVAC installation costs $6,820 to $12,350 on average which includes new ductwork, a new central air conditioner, and a new gas furnace. Replacing an HVAC system without ductwork costs between $4,820 and $9,350 depending on the size of your home, and the brand and grade of equipment chosen.
Can I get my HVAC certification online?
You can study for the test online. Free resources are available online. for a contractor is $200, while the fee for a journeyman is $75.