SS304 vs Aluminium vs Metal Body Air Curtains: Which One & Why

Same blower, same size — yet one air curtain costs ₹15,074 and another ₹22,208. The difference is the body, and it is not cosmetic. Body material decides how the unit survives kitchen grease, coastal humidity, washdowns and forklift bumps. Here is how to choose between aluminium, powder-coated metal and SS304 stainless steel without overpaying or under-speccing.

The three bodies at a glance

	Aluminium	Metal (powder-coated MS)	SS304 stainless
Corrosion resistance	Good (naturally oxide-protected)	Good while coating intact	Excellent, even with washdowns
Kitchen grease + cleaning chemicals	OK with mild cleaners	Coating can degrade with harsh chemicals	Built for it
Coastal / high-humidity cities	Good	Risk at scratches (rust creep)	Best choice
Impact resistance	Dents possible	Toughest per rupee	Tough
Weight	Lightest — easiest install	Heavy	Heavy
Looks	Clean commercial white	Industrial	Premium brushed steel
6 ft price anchor	₹15,074	view price	₹22,208

Decision guide by facility

• Restaurant customer entrance, office, retail, showroom: aluminium. Light, clean-looking, and the environment is kind to it. This is the right default for 70% of buyers.
• Restaurant kitchen pass, food processing, dairy, pharma: SS304. Grease, steam and daily chemical cleaning destroy lesser bodies; stainless shrugs it off and looks audit-ready.
• Warehouse docks, factories, workshops, service corridors: powder-coated metal. Maximum toughness per rupee where nobody cares about looks.
• Coastal cities (Mumbai, Chennai, Kochi, Vizag): prefer SS304 outdoors-facing; aluminium indoors. Avoid plain MS near salt air.

The warranty tiers explain the internals

Our 1Y, 3Y and 5Y tiers are not the same machine with different paperwork — motor grade, blower balancing and switchgear step up with each tier. A 3Y aluminium unit (like the FLOW 4 ft, ₹12,760) is the sweet spot for standard commercial duty; choose 5Y for 15–18 hour daily operation. The body chooses where the unit can live; the tier chooses how hard it can work.

Common mistakes

• Buying SS304 for a dry office lobby — you pay ~45% extra for corrosion resistance the room will never test. Spend it on the longer warranty instead.
• Buying MS for a washdown kitchen — the coating fails at screw points within a year of chemical cleaning.
• Judging by body while ignoring velocity — the barrier is air, not steel. Whatever the body, floor-level velocity must hold (~2.5 m/s commercial doors).

FAQ

Is SS304 air curtain worth it for a restaurant?

For the kitchen side, yes. For the guest entrance, aluminium usually wins on cost and looks — many restaurants sensibly mix both.

What is the price difference between aluminium and SS304?

At 6 ft: ₹15,074 vs ₹22,208 in our range — roughly 45–50% more for stainless at the same performance tier.

Does body material affect performance?

No — airflow comes from the blower and motor. Body decides durability and hygiene, not velocity.

Which body for a hospital?

SS304 at patient/OT corridors (infection-control cleaning is chemical-heavy); aluminium is fine at general entrances. See our hospital solutions.

See all three side by side

Every size in the air curtain range comes in all three bodies, factory-direct with GST invoice and 7-day PAN-India delivery. Unsure? Send a photo of the doorway for a free recommendation via the instant quote form.