Why Every Hospital Needs Air Curtains at OPD Entrances

Hospitals need air curtains at OPD entrances because they reduce airborne infection risk, keep treated air and temperature stable, and help meet NABH infection-control expectations — all while letting patients, staff, and trolleys move freely through busy doorways. A high-velocity air barrier blocks outdoor dust, flying insects, and unfiltered air at the most heavily used entry point in the building.

The infection-control problem at OPD entrances

An OPD entrance opens hundreds of times a day. Each opening lets in outdoor air carrying dust, particulate pollution, and flying insects — all of which work against a hospital's hygiene and infection-control goals. Doors that are propped open for trolley and wheelchair access make this worse. Air curtains solve it without forcing the door to stay shut.

How air curtains help hospitals

Reduced airborne contamination

The downward air stream forms a barrier that limits the exchange of indoor and outdoor air, helping keep filtered indoor air cleaner at the threshold.

Insect and pest exclusion

Flying insects are a serious concern in healthcare. The air barrier physically deflects them away from the entrance, supporting a cleaner clinical environment.

Temperature and comfort stability

OPD waiting areas stay more comfortable when conditioned air is not constantly escaping, which also reduces load on the HVAC system.

Barrier-free access

Unlike a physical door, an air curtain does not obstruct wheelchairs, stretchers, or crowds — important for accessibility and emergency flow.

Air curtains and NABH

NABH accreditation places strong emphasis on infection prevention, facility hygiene, and a safe patient environment. While NABH does not mandate a specific product, air curtains are a recognised, practical control that hospitals use to demonstrate active management of air quality and pest entry at entrances, alongside measures such as HEPA filtration and hand-hygiene stations.

Choosing the right air curtain for a hospital

Match the unit length to the door width and ensure the air stream reaches the floor with adequate velocity for the entrance height. Stainless steel (SS304) models are preferred in clinical settings for their hygienic, easy-to-clean surface and durability. For wide OPD entrances, use a longer model or mount multiple units across the opening. AERSTER's SS304 SHIELD range is built for these demanding, high-traffic environments.

Frequently asked questions

Are air curtains required for NABH accreditation?

NABH does not specify a particular product, but it requires effective infection control and pest management at the facility. Air curtains are a widely accepted way to support those requirements at entrances.

Where exactly should a hospital install air curtains?

The highest-value locations are OPD and main entrances, emergency entrances, pharmacy and kitchen doorways, and any opening between clinical and non-clinical zones.

Are stainless steel air curtains better for hospitals?

Yes. SS304 units offer a hygienic, corrosion-resistant surface that is easy to clean and disinfect, which suits clinical environments better than painted metal.

Do air curtains replace HVAC filtration?

No. Air curtains work at doorways to reduce air exchange and pest entry; they complement, not replace, HVAC and HEPA filtration inside the building.