Mars® Air Curtains stabilize environments, and save energy by minimizing the heated/air conditioned air loss through open doorways. They also effectively repel flying insects, dust and pollutants. Obsidian black powder coated paint finish with variable speed controller. Environmental/Temperature Separation up to 8 feet - Insect Control up to 7 feet. Low Profile design at only 8" in height and very quiet. For doors up to 8'H. ETL listed 5 Year Limited Warranty. Door Limit Switch Sold Separately. 115 volts, phase 1, 2.4 amps. 42"W x 10-3/4"D x 8"H overall.