Checklists by equipment
2 lists · 13 items · 18 photosAir handling unit (AHU) maintenance checklists
Air handling unit (AHU) maintenance checklists for the quarterly and annual rounds: 2 free lists, 13 items and 18 photo requirements, each item naming what to look for and the photo that proves it. Work is commonly verified against SMACNA duct construction and ASHRAE guidance; the edition in force is the AHJ's call on each project.
The air handling unit (AHU) rounds
Air handling unit (AHU) QuarterlyAir handling unit (AHU) quarterly maintenance checklistFilters, belts, coils and drain pans checked on the quarterly round7 items9 photosAir handling unit (AHU) AnnualAir handling unit (AHU) annual maintenance checklistDeep coil cleaning, airflow verification and control calibration on the annual service6 items9 photos
Where each walk sits in the schedule
- Air handling unit (AHU) quarterly maintenance checklistquarterly
- Every quarter, timed ahead of the season change so a failing component is found before the unit is needed hardest. Run by: The HVAC service tech on the contracted quarterly visit.
- Air handling unit (AHU) annual maintenance checklistannual
- Once a year, scheduled for a shoulder season so the unit can be down for cleaning without comfort complaints. Run by: The HVAC service lead, often coordinated with the controls contractor.
What most often fails on an air handling unit (AHU)
- Filter condition judged through the rack gap instead of pulling one and looking at it.
- Condensate pan checked in cooling season only, then the heating-season leak finds the ceiling below.
- Belt tension logged as 'ok' with no deflection check, and the belt fails under the first real load.
- Coils rinsed from the clean side only, pushing the mat deeper instead of out.
- Airflow 'verified' at the grille by feel instead of measured against design.
- Sensor calibration assumed because nobody has complained about the space temperature.
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 air handling unit (AHU) maintenance rounds do these checklists cover?
- Air handling unit (AHU) quarterly maintenance checklist (quarterly): Every quarter, timed ahead of the season change so a failing component is found before the unit is needed hardest. Air handling unit (AHU) annual maintenance checklist (annual): Once a year, scheduled for a shoulder season so the unit can be down for cleaning without comfort complaints.
- Who runs the air handling unit (AHU) maintenance round?
- The HVAC service tech on the contracted quarterly visit. The HVAC service lead, often coordinated with the controls contractor.
- What most often fails on an air handling unit (AHU)?
- Filter condition judged through the rack gap instead of pulling one and looking at it. Condensate pan checked in cooling season only, then the heating-season leak finds the ceiling below. Belt tension logged as 'ok' with no deflection check, and the belt fails under the first real load. Coils rinsed from the clean side only, pushing the mat deeper instead of out.
- Which standards is air handling unit (AHU) work verified against?
- SMACNA duct construction, published by the Sheet Metal and Air Conditioning Contractors' National Association; ASHRAE guidance, published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers. 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 (13 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.