There is no ‘one’ answer. With proper installation, regular service and annual filter replacements, the average lifespan of an HVAC system:
- Standard efficiency (80% AFUE) furnaces: 20-25 years, sometimes up to 30
- High efficiency (90+ AFUE) furnaces: generally 15 years, sometimes up to 20
- Conventional split heat pump systems: 18-20 years
- Mini splits: 8-20 years; budget brands 8-15 years, mid-tier 12-18 years, and premium brands 15-20+ years

