Building: full-service restaurant, Plano, TX. Inspected: July 21, 2026. Equipment: kitchen exhaust fan, make-up air unit with three condensers, two Trane Voyager rooftop units, a restroom exhaust fan and two more small fans.
The job
A site-wide look at everything that moves air on the roof, done in one visit instead of one call per problem. We photographed each unit and wrote down the condition of filters, coils, belts and grease.
What we found
- Kitchen exhaust fan: filter mesh, wheel, housing, grease box and hood heavily soiled from years of buildup.
- Make-up air unit: ten coarse pre-filters that had never been washed. Evaporator coil heavily soiled. No fine filters at all. All three 5-ton condenser coils heavily soiled.
- Both Trane rooftop units: coarse pre-filters not washed since 2021, condenser and evaporator coils never cleaned, and no second-stage filtration installed.
- Small fans: drive belts due for inspection. One of them is about 20 years old, the oldest unit in the building’s equipment list.
We also noted damaged duct insulation on one rooftop unit and a torn flexible connector on the restroom exhaust fan. Neither went into the estimates, and we offered to price them separately.
Why one visit mattered
Dirty coils and missing fine filters feed each other. A coil that has never been protected by a fine-filter stage loads up, the unit runs longer, the kitchen fights for air, and the next call is “it’s hot in the dining room.” Looking at the exhaust fan, make-up air and rooftop units together shows where the problem actually starts.
What the customer got
A written report with more than 20 photos, and seven separate estimates, one for each piece of equipment, so each one could be approved on its own.
Related: restaurant HVAC, rooftop unit service, maintenance agreements. All case studies.