This is the cornerstone reference for any MEP designer working on Indian commercial / institutional / hospitality projects in 2026. Every project goes through these 120 design + review items, organised across the four disciplines. Treat this as the master checklist that catches the 80% of compliance + design issues that show up in tender review, AHJ submission, and post-occupancy audit.
The checklist is structured: Pre-design (5 items) → HVAC (40) → Plumbing (25) → Firefighting (25) → Electrical (20) → Sustainability + Commissioning (5).
Pre-Design (5 items)
1. ☐ Project classification confirmed (Class 1/2/3/4 per NBC 2016 Pt 3 group); compliance basis identified
2. ☐ Climate zone identified per ECBC 2017 (Composite / Hot-Dry / Hot-Humid / Mild / Cold) + ASHRAE 169 (CZ 1A / 2A / etc.)
3. ☐ Seismic zone identified per IS 1893; equipment design factor selected
4. ☐ Wind zone identified per IS 875 Pt 3; cooling tower + outdoor equipment shielding
5. ☐ Stakeholder requirements documented — owner brief, future-flexibility, energy targets, budget envelope, timeline, sustainability rating target
HVAC (40 items)
Cooling load + system sizing
6. ☐ Heat-load calculation per ASHRAE Handbook Fundamentals + ISHRAE Volume 1
7. ☐ Climate data from ISHRAE 2024 (tier-2 cities) or ASHRAE 169 (tier-1)
8. ☐ Diversity factor applied (typical 0.7-0.85 for office; 0.9 for hospital)
9. ☐ Plant capacity sized for design + 15% redundancy
10. ☐ Equipment selected from current BEE star ratings (4-star minimum, 5-star preferred)
Outdoor air + IAQ
11. ☐ NBC 2016 Pt 8 §3 minimum ACH met
12. ☐ ASHRAE 62.1 VRP for multi-zone systems with proper Ev correction
13. ☐ DCV (CO₂ sensors) with NBC 30% minimum lockout
14. ☐ Energy recovery (ERV/HRV) on outdoor air ≥ 70% sensible + 60% latent
15. ☐ MERV-13 minimum filtration; HEPA in critical spaces (cleanrooms, OTs, isolation)
16. ☐ DOAS architecture for hot-humid climate where applicable
Equipment + plant
17. ☐ Chiller IPLV ≥ 7.0 (5-star equivalent); IPLV ≥ 6.30 minimum (ECBC 2017)
18. ☐ Variable-speed primary pumps with VFD on every primary
19. ☐ Free cooling integration (waterside economiser ± airside) for applicable climate
20. ☐ Chilled water reset enabled for free-cooling viability
21. ☐ Cooling tower: premium drift eliminator + COC management
22. ☐ Refrigerant: R454B preferred (R32 acceptable through 2030)
Distribution
23. ☐ Duct sizing per equal-friction or static-regain method
24. ☐ Duct insulation per ECBC + IS 15545 (50 mm minimum, 75 mm preferred)
25. ☐ Pipe sizing within velocity + pressure-drop limits (1.5-2.0 m/s mains)
26. ☐ Pipe insulation per ECBC requirements + condensate prevention
27. ☐ Adequate access panels every 10 m of run and at every fitting
Air distribution
28. ☐ VAV / chilled-beam / fan-coil + DOAS architecture documented
29. ☐ Diffusers + grilles selected for room-throw + noise (NC ≤ 30 office, NC ≤ 25 conference)
30. ☐ Return-air pathway designed (plenum or ducted)
31. ☐ Pressure relationships per occupancy (positive office; negative kitchen/restroom)
32. ☐ Smoke / fire-rated dampers at every smoke barrier (NBC Pt 4 + NFPA 90A)
Specialty
33. ☐ Cleanroom HVAC if applicable (ISO 14644 class, pressure cascade, HEPA terminal)
34. ☐ OT/hospital HVAC if applicable (NABH + ASHRAE 170 + FGI compliance)
35. ☐ Data centre HVAC if applicable (ASHRAE TC 9.9 envelope, hot/cold aisle, free cooling)
36. ☐ Kitchen exhaust if applicable (UL 762 grease-rated, fire suppression)
37. ☐ DG room ventilation per IS 4720 + manufacturer cooling air
38. ☐ Transformer room ventilation per IS 1886 + heat-balance air rate
39. ☐ Smoke control per NFPA 92 + NBC 2016 Pt 4 §6 (high-rise atria)
40. ☐ Stairwell pressurization per NBC 2016 Pt 4 + NFPA 92 (≥4 storey buildings)
41. ☐ Smoke vent design per NFPA 204 + IS 15493 (atrium / warehouse)
42. ☐ Fire-rated dampers commissioning verified (smoke detector + manual reset)
43. ☐ Plant + AHU fire-rated separations + access doors
44. ☐ Shaft / chase compartmentation
45. ☐ Acoustic treatment of plant rooms (NC ≤ 50 outside)
Plumbing (25 items)
Water supply
46. ☐ Daily demand calculated per occupancy + building type (NBC 2016 Pt 9 + IS 1172)
47. ☐ Storage tank sized for 24 hr (residential) or 12 hr (office) demand
48. ☐ Fire water tank ≥ 100 m³ for buildings ≥ 15 m height (NBC Pt 4 §6.3)
49. ☐ Domestic + fire tanks separated with backflow prevention
50. ☐ Booster pump set for buildings > 4 storeys (duty + standby)
51. ☐ Hot water generation + distribution (heat pump or boiler)
52. ☐ Hot water recirculation loop for runs > 30 m (IPC 2018 §607.2)
53. ☐ Water hammer arrestors at all quick-closing valves (PDI WH-201 sizing)
Drainage
54. ☐ DFU calculation per NBC 2016 Pt 9 §7 + IPC 2018 §709
55. ☐ Pipe sizing per cumulative DFU table
56. ☐ Vent stack per IPC 2018 §906; loop / wet venting where applicable
57. ☐ Trap weir + vent within 1.5 m of every fixture
58. ☐ Cleanout every 30 m + at direction changes > 45°
59. ☐ Slope: 1:50 to 1:100 minimum
60. ☐ Roof drainage per IS 15797 + design storm intensity
61. ☐ Stormwater on-site disposal (soak pit / recharge pit) per IS 16636
62. ☐ Greywater recycling for IGBC / LEED water credit (NBC + IS 14687)
Specialty
63. ☐ Swimming pool MEP if applicable (filtration, heating, dehumidification)
64. ☐ Cooling tower make-up + blowdown automation (CTI ATC-105)
65. ☐ Backflow prevention at every potable-to-non-potable boundary
66. ☐ Insulation on cold + hot water lines per ECBC
67. ☐ Pipe materials per code (uPVC / CI / GI / SS) + corrosion compatibility
68. ☐ Anti-vibration connections at pump connections
69. ☐ Floor drain at every fixture room + every wet area
70. ☐ Public/private/blackwater segregation if greywater system installed
Firefighting (25 items)
Sprinkler
71. ☐ Hazard classification confirmed with AHJ in writing
72. ☐ Density × area × inefficiency factor + hose stream allowance
73. ☐ Sprinkler K-factor selection per pressure budget
74. ☐ Most-remote sprinkler ≥ 0.7 bar (NFPA 13 minimum)
75. ☐ Pump on 65-100-150 NFPA 20 performance curve
76. ☐ Hydraulic calculation signed by hydraulic engineer
Standpipe + hydrant
77. ☐ Standpipe class per NBC 2016 Pt 4 §6.3
78. ☐ Hose connection at every floor + at every roof
79. ☐ Test header for annual pump test
80. ☐ Hydrant ring with siamese connection at building exterior
Detection + alarm
81. ☐ Detector type per space (smoke/heat/beam/aspiration)
82. ☐ Spacing per NFPA 72 + IS 2189 limits
83. ☐ Audible ≥ 75 dBA + visual strobe in all occupied positions
84. ☐ Voice evacuation for buildings > 4 storeys (IS 2189)
85. ☐ Cross-zoned detection for clean-agent zones
Suppression + smoke control
86. ☐ Clean-agent suppression (Novec 1230 / FM-200 / IG) for sensitive spaces
87. ☐ Door-fan test commissioning + 10-min hold
88. ☐ Smoke control per NFPA 92 + NBC Pt 4 (atria > 9 m)
89. ☐ Stair pressurization (≥4 storey) with door-opening force ≤ 110 N
90. ☐ Smoke vent design per NFPA 204 + IS 15493
General
91. ☐ Fire pump set: main + jockey + backup driver
92. ☐ Fire water tank ≥ 100 m³ minimum + dedicated suction line
93. ☐ Fire-rated separations at all penetrations (intumescent putty + dampers)
94. ☐ Manual call points at every exit + every floor
95. ☐ Annual NFPA 25 + IS 15105 inspection schedule documented
Electrical (20 items)
Load + cabling
96. ☐ Electrical load calculation per NBC 2016 Pt 8 §4 + IS 732
97. ☐ Cable sizing with full derating chain (IS 1554 / IS 7098 / IEC 60364)
98. ☐ Voltage drop ≤ 4% per NBC + IS 732
99. ☐ Cable trays sized for spare capacity (25-30%)
100. ☐ Cable identification + labelling per IS 11353
Distribution
101. ☐ Switchgear coordination (selectivity) verified
102. ☐ MCB / MCCB ratings per equipment + NBC + ECBC
103. ☐ Earthing per IS 3043 (target R_e ≤ 1 Ω substation, ≤ 4 Ω commercial)
104. ☐ Lightning protection per IS 2309 (rolling-sphere)
105. ☐ Surge protection devices on critical circuits
Power quality
106. ☐ Harmonic filter for non-linear load > 30% of total
107. ☐ Capacitor banks detuned (with reactor in series)
108. ☐ Neutral conductor sized for triplen-harmonic content
109. ☐ K-factor transformer if non-linear load > 30%
Specialty + controls
110. ☐ DG sizing per IS 12469 + load-step capability
111. ☐ Transformer sizing + cooling per IS 1886 + IS 2026
112. ☐ Lighting design per IS 3646 + ECBC LPD limits
113. ☐ Lighting controls: daylight harvesting + occupancy sensors per ECBC
114. ☐ BAS / BMS architecture documented (BACnet / Modbus / KNX)
115. ☐ UPS sizing for critical loads (IT, fire alarm, lift)
Sustainability + Commissioning (5 items)
116. ☐ Sustainability rating target identified (LEED / IGBC / GRIHA / BEE)
117. ☐ Whole-building energy modeling per ECBC + ASHRAE 90.1 baseline
118. ☐ ECBC 2017 / 2030 compliance documentation
119. ☐ Commissioning plan per ECBC §1 + ASHRAE 211
120. ☐ Post-occupancy verification scheduled (12 months operational data review)
Final design submission package (15 items)
The 120 items above feed into a complete submission. Required deliverables:
- General design notes + assumptions
- Full set of MEP drawings (HVAC + Plumbing + Fire + Electrical)
- Equipment schedules with manufacturer + model number
- Hydraulic calculation reports (water + sprinkler)
- Heat-load calculation reports
- Electrical load + cable size + voltage drop reports
- Code-compliance matrix (NBC + ECBC + IS + NFPA)
- Sustainability rating documentation
- Energy modeling report
- Commissioning plan
- BOQ with vendor short-listing
- Tender drawings + technical specifications
- Test + commissioning protocols
- O&M manual outline
- Project schedule + critical path
Cross-references
This checklist is the practical realisation of:
- NBC 2016 Pts 4 (fire), 8 (electrical/HVAC), 9 (plumbing), 11 (sustainability) — see *NBC 2016 MEP Master Guide* pillar
- ECBC 2017 + 2030 trajectory — see *BEE 2030 Roadmap* article
- ASHRAE 62.1 + 90.1 baseline modeling — see *ASHRAE 62.1 VRP Implementation* pillar
- NFPA 13/20/72/92/2001 — see *NFPA Standards in India* article
- IS series — see *ISHRAE Handbook 2024 Overview* + individual code articles
Workflow with the checklist
1. Schematic design (10% complete): items 1-5 + system-architecture decisions (items 17, 19, 32, 51, 71, 96)
2. Design development (35% complete): items 6-50 + sizing pass
3. Construction documents (75% complete): items 51-115 + drawings
4. Tender (95% complete): items 116-120 + submission package
5. Commissioning + handover: all 120 items verified
For typical Indian commercial project, full checklist completion = 8-12 weeks of MEP design effort by a 4-6 person team.
Related calculators
The MEPVAULT calc engine handles many of these items:
- Lighting Load Calculator (item 112)
- Cable Sizing Calculator (item 97)
- Plumbing DFU + Pipe Sizer (items 54, 55)
- Plumbing Demand by Building Type (item 46)
- Firefighting Pipe Sizer + Pump Head (item 75 — under development)
- ASHRAE VRP + Multi-Zone (item 12 — under development)
- NBC Emergency Ventilation (item 89 — under development)
Five common checklist mistakes
1. Treating it as a tick-box. Each item requires actual engineering, not just “yes”. Quality of analysis matters.
2. Missing AHJ pre-confirmation. Hazard classification, climate zone, and importance factors should be confirmed in writing before submission.
3. Generic equipment specs. “5-star chiller” insufficient — specify the actual IPLV target.
4. No commissioning budget. Items 119-120 require dedicated commissioning team + budget; often skipped.
5. No post-occupancy verification. 12-month operational data review is the only way to validate the design intent.
References: NBC 2016 Pts 1, 4, 8, 9, 10, 11; ECBC 2017 + 2030 (anticipated); IS series (1893, 3043, 3646, 3961, 1554, 7098, 1172, 14687, 15797, 16636, 13039, 12469, 15105, 2189, 4720, 1886); NFPA 13/20/72/92/204/2001; ASHRAE 62.1, 90.1, 170, TC 9.9; ISHRAE Handbook 2024; BEE Star Labelling 2024; LEED v4.1; IGBC v3; GRIHA v2019.
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