The answer to 'when to replace HVAC system' is that most HVAC systems need to be replaced every 10-15 years, depending on factors like usage, maintenance, and efficiency. As an HVAC system ages, it becomes less efficient and more prone to breakdowns, costing you more in energy bills and repair costs. If your system is over 10 years old and experiencing frequent issues, it's generally a good idea to consider replacing it with a newer, more energy-efficient model.
Newer HVAC systems are designed to be more reliable, energy-efficient, and environmentally-friendly. Upgrading can save you money on your utility bills and reduce your carbon footprint. It's important to work with a qualified HVAC technician to assess your current system and determine the best replacement option for your home.