Reduce heat stress and improve air quality with Schaefer's uniquely designed circulation fans. Unrivaled in the market, these fans are engineered to produce greater air movement and superior cooling no matter the application. You don't hear them. You don't see them. You only feel them! Also known asHorizontalAir Flow (HAF) fans, these fans move air ina coherent horizontal patterncreating a gentle 'racetrack' air flow pattern needed in greenhouses tomaximize heat distribution and humidity control by mixing the air, from ceiling to floor. Made in the United States.Features and Benefits: Deep guard design for unmatched performance, low noise levels and safety without sacrificing airflow Matched high quality motors and blades for maximum efficiency Powder coated steel guards for increased durability and corrosion resistance Powder coated steel mounting bracket and power cord included Wide variety of mounting options available for flexible and easy installation Two year warranty Made in the USA Specifications Blade Color Metallic Brand Schaefer Cfm (free Air) 5830 Rpm 60 Hz Motor 1550-1800 Drive Direct Enclosure TEAO Frame Size 48 Mount Included VS20FMT Phase 3 Speeds 1 Vfd Compatible No Cord Not included Diameter (inches) 20 Frequency (hz) 60/50 Guard Color White Mount Type Included Ceiling Nameplate Amps 1.56 / 0.778 Number Of Wings 3 Power (hp) 1/2 Product Net Weight (lbs) 33 Switch Not included Voltage 230/460 Maximum Rpm 1750 Blade Material Aluminum Cfm Calculation Standard ANSI/AMCA Standard 230-99 Product Color White Product Shipping Dimensions (in) 23 x 23 x 18 Speed Control Compatible? No Cfm Range (free Air) 5001 - 10000 Fixed Or Portable Fixed Guard Material Powder Coated Steel Oscillating No Rpm 50 Hz Motor 1350-1500 Country Of Origin US Guard Spacing (inches) 1/2 - 1 UL507