National HVAC replacement costs average $5,000 to $15,000 per system lifespan

https://precisionhvacrepairsacramento-licensed-sac-near-super-mark9096.talesignal.com/posts/know-your-system-s-age-before-deciding-repair-or-full-replacement-today-2

Most residential HVAC systems last 15 to 20 years, but replacement decisions hinge on cost-data benchmarks rather than age alone