The size of your home, the type of system you're installing, the brand and model you select, the local labor rates, and any additional features or components can all have a big impact on the price of a new HVAC system. For smaller homes, replacing a simple HVAC system can cost between $3,000 and $7,000 on average. For larger homes or more complex systems, the cost may be between $7,000 and $15,000 or more. To get a more precise estimate for your unique needs and location, it's crucial to get quotes from reliable HVAC contractors.