The answer to 'how long will replacement last' is that the lifespan of a replacement HVAC unit can vary widely, but typically ranges from 10 to 15 years with proper maintenance. The actual lifespan depends on factors like the quality of the equipment, how often it is used, and how well it is maintained by the homeowner.
Higher-quality HVAC units from reputable brands tend to last longer than budget models, often reaching 15 years or more with regular tune-ups and filter changes. Units in homes with fewer occupants or milder climates may also last longer than those in larger homes or extreme weather regions. Proper installation by a licensed HVAC technician is also crucial for maximizing the unit's lifespan.