Start from what's actually wrong
Because Chrysler- and Ford-era subdivisions here share a construction window, a lot of Sterling Heights homes are approaching system replacement around the same time, often needing a duct or panel review before a new high-efficiency unit goes in.
A written scope should spell out
- The existing condition and probable cause
- Prep and protection for the rest of the house
- Material and equipment compatibility
- Permit filing, testing, cleanup, and restoration
- Exclusions, warranty terms, and the change-order process
Sterling Heights context
A mechanical permit is required for HVAC replacement in Sterling Heights, processed through the city's Office of Building. Homes from the 1950s-70s construction wave often need a duct or electrical-panel review before a modern high-efficiency system can be installed as designed.