How to Choose the Right Air Curtain for Your Business

To choose the right air curtain, match its length to your door width, pick an air velocity strong enough to reach the floor for your door height, and select a build grade (aluminium or SS304) that suits the environment. Get those three right and the curtain will form an effective barrier against heat, dust, and insects. This guide breaks down each factor.

1. Match the length to your door width

The air curtain should be at least as wide as the door opening so the air barrier covers the full width with no gaps. For a standard single door up to about 3 to 4 ft, a 3 ft or 4 ft model works. For wider or double-door entrances, choose a 5 ft, 6 ft, or 7 ft model, or mount two units side by side so their air streams meet.

2. Choose the right air velocity for your door height

The air stream must reach the floor with enough force to hold the barrier. Taller doors and windy, exposed locations need higher velocity. Standard commercial entrances are fine with regular models, while tall industrial doorways and high-wind sites need high-velocity units — AERSTER's SHIELD MAX range delivers velocities up to 14 m/s for these demanding conditions.

3. Pick the right build for the environment

Aluminium-body curtains are light, cost-effective, and ideal for shops, offices, and restaurants. SS304 stainless-steel models are more durable and hygienic, making them the right choice for hospitals, food processing, cold storage, and harsh industrial settings.

4. Consider the application

Think about what you are protecting against. For fly and insect control at a restaurant, prioritise a strong, continuous air stream. For energy savings in an air-conditioned space, prioritise full-width coverage and reach. For cold storage, pair the air curtain with PVC strip curtains for the tightest barrier.

5. Check warranty and after-sales support

A longer warranty signals build quality. AERSTER offers up to a 5-year warranty on core models, sells factory-direct with GST invoicing, and provides spare parts such as motors, blower assemblies, and bearings for long-term serviceability.

Frequently asked questions

What size air curtain do I need?

Choose a unit at least as wide as your door opening. For openings wider than the largest single model, mount multiple units side by side.

Aluminium or stainless steel air curtain?

Aluminium suits shops, offices, and restaurants. SS304 stainless steel is better for hospitals, food processing, and industrial or corrosive environments.

How high can an air curtain be mounted?

It depends on the model's air velocity. Standard units cover typical commercial door heights; tall industrial doors need high-velocity models so the air stream still reaches the floor.

How much does an air curtain cost in India?

Prices range from a few thousand rupees for compact commercial units to higher for large SS304 industrial models. AERSTER offers factory-direct and bulk B2B pricing.