Improved Overhead

Greenheck redesigns HVLS fan models for industrial applications

Greenheck announced the redesign of its DS-3 three-bladed and DS-6 six-bladed High Volume Low Speed (HVLS) overhead fans, engineered to deliver "significant performance advantages, best-in-class reliability, advanced configurability, and ease of installation" for a wide range of applications, the company said in December 2025 press release.

The redesigned DS Series fans are said to provide higher air performance up to 281,700 cfm, larger coverage areas, and increased cooling effects up to 15°F, thereby ostensibly helping to improve comfort and reduce energy costs.

Greenheck was founded in Schofield, Wisconsin as a small sheet metal shop in 1947. Today, Greenheck fans, energy-recovery ventilators, packaged ventilation, make-up air units, dampers, louvers, kitchen ventilation systems, laboratory exhaust systems, and coils are shipped around the globe. The company's flagship ventilation products can be found behind walls, in ductwork, and on the roofs of hospitals, office buildings, hotels, shopping malls, restaurants, schools, industrial plants, warehouses, data centers and other commercial buildings.

Engineered for "superior efficiency," the DS-3 and DS-6 achieve Ceiling Fan Energy Index (CFEI) values up to 83% higher than the minimum DOE (Department of Energy) requirements. Each model is rated for a maximum operating temperature of 130°F/55°C and carries an IP66 ingress protection rating, which is considered good protection against dust and water in extreme conditions.

The DS-3 and DS-6 are compatible with the industry’s widest range of control options, including ModBus® RTU, BACnet® MSTP, 0-10VDC, and more, and are available with a variety of factory-programmed controllers, including economical 4-speed and multispeed analog controls. A factory-assembled power pack, along with additional time-saving features like plug-and-play wiring, can reportedly "cut installation time in half." A field-adjustable extension tube "enables quick, easy adjustments" to the fan’s drop length, while automated commissioning and diagnostic test modes "simplify fan setup and operation."