| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. SUPPLY AIR FLOW MEASUREMENT | |||
| A1 | Supply air flow measured at main outlet or supply plenum; flow meter or anemometer readings recorded Acceptance: Flow measured in m³/s or CFM; ≥95% of design flow rate acceptable; measurement method and meter calibration documented | Cl. 4.1 — Main supply flow | OK NC NA HOLD |
| A2 | Static pressure drop measured from plenum to room outlets (differential pressure gauge) Acceptance: Pressure drop measured in Pa; acceptable range typically 50-200 Pa depending on duct design; documented | Cl. 4.2 — Pressure drop assessment | OK NC NA HOLD |
| B. RETURN AIR FLOW MEASUREMENT | |||
| B1 | Return air flow measured at return plenum or main return duct; values recorded and compared with supply flow Acceptance: Return flow ≈ Supply flow (within ±5% tolerance); if exhaust present, return + exhaust = supply ±5% | Cl. 5.1 — Return flow measurement | OK NC NA HOLD |
| C. EXHAUST AIR FLOW MEASUREMENT | |||
| C1 | Exhaust air flow measured at exhaust outlet (if applicable); flow rate recorded Acceptance: Exhaust flow ≥ minimum required per design (typically 10-30% of supply); measurement documented | Cl. 6.1 — Exhaust flow measurement | OK NC NA HOLD |