Multiplex Cinema MEP — Dolby Atmos + SMPTE + ASHRAE Handbook Ch 4 + NFPA 5000
An 8-screen Tier-1 Indian multiplex demands ₹12.5 Cr MEP capex with 159 TR total / 110 TR diversified cooling + Dolby Atmos-compliant NC 25-30 acoustic ceiling. ASHRAE Handbook Ch 4 + ASHRAE 62.1 + Dolby Atmos Premier + SMPTE 196M + NFPA 5000 + NBC + ICTA govern. Three failures: AHU noise breaching NC 25-30 due to 7.5 m/s duct velocity (Atmos certification fails), common AHU for 4 screens missing show-timing variance, smoke management common to all screens instead of independent per auditorium (8 simultaneous evacuations impossible).
Multiplex cinema MEP — the design event
Indian multiplex chains (PVR INOX, Cinepolis, Carnival, Miraj) typically build 8-16 screen complexes inside malls or standalone. Each auditorium has 100-400 seats + intense Dolby Atmos audio (NC 25-30 required) + concentrated patron metabolic heat (110 W/m² peak) + concurrent occupancy unpredictable across screens. ASHRAE Handbook 2023 Ch 4 + ASHRAE 62.1 + Dolby Atmos Room Specification + SMPTE 196M + NFPA 5000 + ICTA Indian Cinema Technical Association guidelines govern. The classic failure is single AHU per multiple screens = thermal interaction + acoustic bleed.
8-screen multiplex MEP — typical Tier-1 city mall
| Auditorium | Seats | Sensible (W/m²) | OA (L/s/pax) | Acoustic NC | Cooling (TR) |
|---|---|---|---|---|---|
| Screen 1 IMAX/Laser | 450 | 115 | 9 | NC 25 (Dolby Premier) | 38 |
| Screen 2 Standard | 300 | 110 | 9 | NC 30 | 22 |
| Screen 3 Standard | 280 | 110 | 9 | NC 30 | 20 |
| Screen 4 Recliner Gold | 120 | 85 | 9 | NC 25 | 12 |
| Screen 5 Standard | 220 | 110 | 9 | NC 30 | 16 |
| Screen 6 Standard | 220 | 110 | 9 | NC 30 | 16 |
| Screen 7 Standard | 180 | 110 | 9 | NC 30 | 14 |
| Screen 8 Director-Cut | 80 | 85 | 9 | NC 25 | 9 |
| Lobby + box office | — | 75 | 7.5 | — | 12 |
| Concession + F&B | — | 120 + hood | 15 | — | — |
| Total cooling | — | — | — | — | 159 TR |
| Diversified peak | — | — | — | — | 110 TR (0.7) |
Three multiplex MEP failures Indian chains keep making
- Audio NC + HVAC noise breach — Dolby Atmos requires NC 25-30 measured at audience seat. AHU + duct + diffuser velocity + return-air paths must be acoustic-engineered. Indian designers default to 7.5 m/s duct velocity (NC 40-45) — Atmos certification fails + chain rejects handover.
- Common AHU for 4 screens — screens have different show timings + occupancy patterns. Common AHU = thermal complaint at 40 % part-load. Each screen needs dedicated VRF or DX + dedicated DOAS, not shared chilled-water AHU.
- Smoke exhaust missing per-auditorium — NBC + NFPA 5000 require independent smoke management per assembly occupancy. Common multiplex smoke fan does not give time for 8 simultaneous evacuations.
- ASHRAE Handbook HVAC Applications 2023 Ch 4 — Places of Assembly.
- ASHRAE 62.1-2022 Table 6.1 — Movie/TV Theatre (5.0 L/s/m² + 7.5 L/s/pax).
- Dolby Atmos Premier Cinema Specification 2024 + Dolby Vision Theatre Spec.
- SMPTE 196M-2024 — Motion Picture Theatre Sound + Picture.
- NFPA 5000:2024 Ch 28 — Assembly Occupancies + NFPA 101 Ch 12-13 New + Existing Assembly.
- NBC 2016 Part 4 §4.3 + Annex F.
- ICTA Indian Cinema Technical Association Standards 2024.
- SMACNA Indoor Air Quality Guidelines for Occupied Buildings under Construction 2007.