The answer to 'how often to replace system upgrade' is that the frequency of system upgrades can vary depending on the age and condition of your HVAC equipment. As a general rule, most homeowners should consider upgrading their HVAC system every 10-15 years. This timeline can be influenced by factors such as the system's energy efficiency, repair history, and overall performance.
Upgrading your HVAC system can provide significant benefits, including improved energy efficiency, increased comfort, and reduced utility bills. It's important to work with a qualified HVAC technician to assess your current system and determine the best time to consider an upgrade.