Document the condition
Note location, timing, weather relationship, changes over time, and any previous work. Photos and simple measurements can improve the first conversation.
Read the local context
Troy's housing spans the 1960s-70s ranch-subdivision boom that followed its 1955 incorporation and the office and retail construction that followed the Somerset Mall's 1969 opening. Both eras have to answer to Michigan's humid continental climate -- winter lows near 18°F, summer highs near 80°F, and winter relative humidity near 85 percent -- which sets a wide load range for any comfort system.
Ask what will be hidden
Equipment condition, duct leakage, airflow, humidity control, insulation, electrical capacity, and room-by-room comfort all belong in the conversation. The written scope should explain the preparation and verification that will no longer be visible at completion.
Compare complete scopes
Look for protection, access, materials, permits, testing, cleanup, restoration, exclusions, warranties, and change-order rules.
What official local sources add
The City of Troy's Building Department handles permits for electrical, mechanical, plumbing, and building work, and flags that many exterior projects also need homeowner-association review; its Engineering Department separately manages floodplain and stormwater permitting. Confirm which permits apply before scheduling HVAC work.
Sources were reviewed 2026-07-26. Confirm parcel-specific flood zones, historic-district status, permits, and current requirements with the relevant authority before authorizing work.