Checklists by equipment
2 lists · 12 items · 16 photosVAV terminal unit maintenance checklists
VAV terminal unit maintenance checklists for the quarterly and annual rounds: 2 free lists, 12 items and 16 photo requirements, each item naming what to look for and the photo that proves it. Work is commonly verified against IMC (mechanical code); the edition in force is the AHJ's call on each project.
The VAV terminal unit rounds
VAV terminal unit QuarterlyVAV terminal unit quarterly maintenance checklistDamper travel, inlet filter and reheat operation checked above the ceiling each quarter6 items8 photosVAV terminal unit AnnualVAV terminal unit annual maintenance checklistAirflow calibration, reheat coil and valve service and sound check on the annual pass6 items8 photos
Where each walk sits in the schedule
- VAV terminal unit quarterly maintenance checklistquarterly
- Every quarter, grouped by floor so a tech opens a run of ceiling tiles once and hits every box on the zone. Run by: The controls or mechanical tech on the quarterly zone round, working off the ladder above the ceiling.
- VAV terminal unit annual maintenance checklistannual
- Once a year, tied to the air-side service so the box calibration is verified against a known supply pressure at the air handler. Run by: The balancing or controls tech on the annual, coordinating with the building automation system.
What most often fails on a VAV terminal unit
- Box called good from the thermostat while the damper is actually stuck and the zone is riding on the neighboring box's air.
- A box swapped to full heat by an occupant complaint and never returned to auto, so it fights the system all season.
- Ceiling tiles left out or filters found missing at the inlet after the last tech never came back to close up.
- Minimum and maximum airflow left at the manufacturer default because no one cross-checked the box against a balancing reading.
- Reheat coil quietly fouled or an air-bound hot-water valve, so the zone under-heats and gets 'fixed' by raising the whole floor's setpoint.
- A box roaring at high flow written up as a diffuser problem when it's the damper hunting on a mis-tuned controller.
Verified against
Families only, never clause numbers. Adoption varies by jurisdiction; confirm the edition your authority having jurisdiction enforces before you run a walk against it.
Common questions
- Which VAV terminal unit maintenance rounds do these checklists cover?
- VAV terminal unit quarterly maintenance checklist (quarterly): Every quarter, grouped by floor so a tech opens a run of ceiling tiles once and hits every box on the zone. VAV terminal unit annual maintenance checklist (annual): Once a year, tied to the air-side service so the box calibration is verified against a known supply pressure at the air handler.
- Who runs the VAV terminal unit maintenance round?
- The controls or mechanical tech on the quarterly zone round, working off the ladder above the ceiling. The balancing or controls tech on the annual, coordinating with the building automation system.
- What most often fails on a VAV terminal unit?
- Box called good from the thermostat while the damper is actually stuck and the zone is riding on the neighboring box's air. A box swapped to full heat by an occupant complaint and never returned to auto, so it fights the system all season. Ceiling tiles left out or filters found missing at the inlet after the last tech never came back to close up. Minimum and maximum airflow left at the manufacturer default because no one cross-checked the box against a balancing reading.
- Which standards is VAV terminal unit work verified against?
- IMC (mechanical code), published by the International Code Council. Adoption varies by jurisdiction. Confirm the edition your authority having jurisdiction enforces before you run a walk against it.
- Can I run these checklists in RTI?
- Yes. Start a free RTI workspace and load any of the 2 lists (12 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper-evident audit trail.