Warehouse + ILP MEP Design — NFPA 13 ESFR + NFPA 204 Smoke Vent + ASHRAE 90.1

A 25,000 m² Indian Logistics Park warehouse with 12 m clear height + double-deep racks storing Group A plastics needs ESFR K=22.4 @ 60 psi (NFPA 13:2025 Ch 25) — not the K=11.2 standard upright Indian designers still default to. Total MEP capex ₹12 Cr (Fire ₹4.8 Cr / HVAC ₹1.8 Cr / Plumbing ₹1.2 Cr / Electrical ₹2.5 Cr). Three errors we find: standard sprinklers specd in 12-m racking that fail suppression test; HVAC sized for “industrial” instead of acclimatised storage missing DOAS + indirect evap opportunity; NFPA 204 smoke vents omitted, letting fire jump partitions.

Indian warehousing fire-classification framework

Warehouses + logistics buildings carry the highest combustible load + occupancy hazard of any commercial typology. NFPA 13 Ch 20-25 classifies storage by commodity (CC1-CC4 + Group A-C plastics) + height + rack configuration. Indian Logistics Park (ILP) typology with 12-m clear height + double-deep racking pushes most facilities into Extra Hazard Group 2 + High-Piled Storage. ESFR (Early Suppression Fast Response) sprinklers per NFPA 13-2025 are now the default — but most Indian designers still spec K=11.2 standard upright instead.

Sprinkler design — 25,000 m² ILP warehouse, 12 m clear, double-deep racks

Three warehouse-MEP failures we keep finding on Indian ILP sites

1. Standard sprinklers in 12-m racking — NFPA 13-2025 Ch 25 requires ESFR for storage > 7.6 m with high-challenge commodities. Standard K=11.2 upright at 0.6 GPM/sf fails the suppression test for Group A plastics + double-deep racks. ESFR cuts sprinkler-actuated count from 12 to 3.
2. HVAC sized for “industrial” instead of acclimatised storage — pharma, cold-chain, e-commerce returns processing need 24-28°C + 50-65 % RH, not “industrial” 30+°C. DOAS + indirect evaporative cooling is the right path for north India ILPs (Bhiwadi, Lucknow, Indore) cutting capex 35-45 % vs full DX air-conditioning.
3. Loading-dock smoke management missing — NFPA 13 + NBC 2016 Pt 4 require smoke vents at 0.4 m² per 9.3 m² floor for high-piled storage. Indian designers omit because rooftop monitors are an aesthetic concern. Without smoke vents, sprinkler discharge cannot reach the seat of fire + fire jumps over wall partitions.