The answer to 'how often to replace HVAC system' is that most HVAC systems need to be replaced every 15-20 years, on average. HVAC systems are complex pieces of equipment that wear down over time, and replacing them is crucial for maintaining efficient heating and cooling in your home. Factors like usage, maintenance, and environment can impact the lifespan of an HVAC system.
As your HVAC system ages, it becomes less efficient and more prone to breakdowns. Replacing an older system can improve your home's comfort, reduce energy bills, and provide greater reliability. It's generally recommended to start planning for a replacement when your system reaches 10-15 years old, so you can budget and prepare for the upgrade.