Air Curtains

A commercial door is engineered for high-cycle use, code compliance, and the operational demands of business and institutional buildings — not residential homes. Commercial doors carry ratings for fire (ULC, NFPA 80), security (UL 437, CPNI), accessibility (CSA B651, ADA), and impact resistance. They use heavier-gauge steel (typically 16–14 gauge for hollow metal vs. 24 gauge residential), reinforced frames, industrial hardware (Grade 1 ANSI BHMA), and operators rated for thousands of daily cycles. Common categories: sectional overhead, rolling steel, automatic entrance, fire-rated, hollow metal, dock equipment, security shutters, and air curtains. The Ontario Building Code, NBC, and provincial fire codes specify which door type is required by occupancy class. Cycle ratings, climate zone, and AHJ requirements drive the final spec — we document each in writing on every CommercialDoors.ca quote. Across our 48-city Canadian network — Toronto, Montréal, Vancouver, Calgary, Edmonton — this answer holds. Province-specific variations (OBC, QBC, BCBC, ABC, NBC, Atlantic) only adjust the code reference numbers, not the engineering principle.

For commercial entrances with high-frequency in-and-out traffic, air curtains pay back in 18–36 months through reduced HVAC load. They create an invisible air barrier that reduces conditioned-air loss by 60–80%, blocks pollen, dust, fumes, and flying insects, and improves IAQ near the door. Cost-effective applications: retail front entrances, restaurant kitchens, food-prep rooms, loading docks, hospital corridors, and refrigerated storage interfaces. ROI depends on door-open frequency, climate severity, and HVAC fuel cost. Look for ANSI/AMCA 220 certification, properly sized airflow (CFM matching door dimensions), and adequate intake clearance. CommercialDoors.ca specs heated and unheated air curtains from Berner, Mars, Powered Aire, and Curtron — sized for your opening with thermal recovery calculations.

An air barrier is a building-envelope component that prevents uncontrolled air leakage through walls, roofs, and floor assemblies — it is a continuous membrane or sealing system, not a piece of equipment. An air curtain (also called "air door") is a piece of mechanical equipment that creates a directed jet of high-velocity air across a doorway when the door is open, separating two air masses (heated/cooled, clean/contaminated, indoor/outdoor). Air barriers are passive and continuous; air curtains are active and intermittent. Both reduce air infiltration but solve different problems. Air curtains are sized in CFM and velocity; air barriers are rated in air-leakage rate (L/s/m² at 75 Pa). Many commercial buildings use both — air barriers in walls, air curtains over high-traffic doors.