Cold Store Door Heat Load Calculator
Estimate the heat that pours through a cold-room doorway every time it opens — from door size, the inside-vs-ambient temperature gap, humidity and how often it's open. See the ₹/day energy cost and how much a strip curtain, air curtain or high-speed door saves. Indicative India 2026 — not a refrigeration design.
Your doorway
Overlapping PVC strips; ~80–90% cut while staff/forklifts pass through. ΔT 30°C · opening 4.8 m² · door open about 17% of active hours (~2 h/day). Indicative — density-driven infiltration scales with area, ΔT, humidity and open time.
Energy cost / day with PVC strip curtain (incl. GST)
₹0
~33 kWh/day · doorway load while open ~32.6 kW · ₹10,391/month
Heat / day
65 kWh
cold-side
Cost / day
₹346
Saved / day
₹1,963
vs no barrier
A pvc strip curtain cuts the doorway loss by ~85%, saving about ₹1,963/day (~₹7,16,433/year). At a supply cost of ~₹3,000–15,000 (ex-GST), payback can be a few months for a busy door.
Energy cost per day, by doorway option
Indicative ₹/day at your tariff, COP and opening pattern. Your selected option is highlighted; the cheapest is green.
Cut your cold-room running cost
DesignAI helps you choose the right doorway barrier for your opening frequency, ΔT and dock layout — and sense-checks the energy saving and payback.
How this is estimated
This is a simplified density-driven doorway infiltration model: dense cold air spills out at the bottom of the opening while warm, humid ambient air flows in at the top, and the sensible + latent enthalpy of that exchanged air is the doorway heat load. It scales with opening area, the inside-to-ambient temperature gap (ΔT), humidity and the fraction of time the door is open (openings/hour × avg open time). The cold load is converted to electricity using your refrigeration COP, then to ₹/day at your tariff. Mitigation percentages (strip curtain ~85%, air curtain ~70%, high-speed door ~90%) are indicative typical reductions while the door is in use.
Indicative only. These cold-store doors and refrigeration plants are project-engineered — get a vendor spec and a qualified refrigeration consultant's load calculation before sizing equipment. Real loads also depend on insulation, infiltration through cracks, product pull-down, lighting, fans, defrost and door-protection housekeeping. Equipment prices are supply-only, ex-GST; add 18% GST and installation. Tariffs vary by state and demand category.
Related Guides — Deep-dive reading
Cold Storage Doors in India: Insulated Cold-Room and Freezer Doors That Actually Seal (2026)
How to specify cold-room and freezer doors for Indian warehouses, food plants and pharma stores - PUF-insulated sliding and hinged doors, heated-frame sub-zero freezer doors, high-speed insulated roll-ups for traffic, strip and PVC curtains as a buffer, pressure-relief ports and the inside safety release that stops anyone being trapped - with indicative per-door costs by temperature band.
Home Doors & EntrancesPVC Strip Curtain Doors: Grades & Specs Guide India 2026
The low-cost flexible barrier — sizing strip width, thickness and overlap for thermal, dust, pest and noise control in warehouses and cold rooms.
Home Doors & EntrancesAir Curtain Doors in India 2026: Sizing, Velocity & Spec
How air curtains form an invisible barrier at open entrances—cutting heat, AC loss, dust and insects—plus sizing, velocity and IS/AMCA context.
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