12/4-03

Inline Centrifugal Grease Fan Specification

Inline grease exhaust fans shall be of the tubular centrifugal type with backward inclined wheels. Fans to include the UL 762 Label for grease removal and shall be built in accordance to NFPA 96 (Ventilation Control and Fire Protection of Commercial Cooking Operations).

The housings shall be continuously welded heavy gauge steel with integral duct flanges to prevent grease and moisture leakage. Duct flange bolt holes shall be no more than 4 inches (100 mm) apart on center to provide a tight duct connection. Belt tubes shall be continuously welded to ensure belt remains free of grease and moisture. Bearing covers to be sealed with silicone gasketing rated for 400o F (200o C) and include a labyrinth shaft seal to protect the bearings from the airstream contaminants (felt or neoprene shaft seals are not acceptable). Fan housing to include two threaded and plugged drain connections that are located at 90o from the motor. Fans are to be universally mountable with motors in either the 3 or 9 o’clock position.

Inline grease fans shall include an oversize access door to allow for duct cleaning and for removal of the fan wheel, shaft and bearings without lowering the fan from the duct system. Fastening bolts for the oversized access door shall be no more than 4 inches (100 mm) apart on center. The oversize access door to include silicone gasketing rated for 400o F (200o C).

The wheel shall be of the non-overloading backward inclined centrifugal type with aluminum construction. Wheel shall be statically and dynamically balanced. The wheel cone and fan inlet cone shall be carefully matched and shall have precise running tolerances for maximum performance and operating efficiency.

Turned precision ground and polished steel shafts shall be sized so the first critical speed is at least 25% over the maximum operating speed for each level of construction.

Bearings shall be heavy-duty grease lubricated and self-aligning. Bearings shall be selected for a basic rating fatigue life L (10) of 80,000 hours {equivalent to L(50) average life of 400,000 hours} at the maximum operating speed.

All internal and external steel components shall be painted with Permatector, an electrostatically baked polyester urethane coating. All coated materials shall undergo a five stage environmentally friendly wash, followed by a minimum 2 mil dft finish. Paint must exceed 1,000 hour salt spray under ASTM B117 test method.

Inline tubular centrifugal fans shall bear the AMCA Certified Rating Seals for both sound and air performance.

Fans shall be TCB as manufactured by Greenheck Fan Corporation of Schofield, Wisconsin, USA.

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Greenheck Fan manual 12/4-03 Inline Centrifugal Grease Fan Specification
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Inline Centrifugal Grease Fan specifications

The Greenheck Fan Inline Centrifugal Grease Fan is an exceptional solution specifically engineered for the efficient removal of grease-laden air in commercial kitchen environments. Designed with a seamless blend of performance and durability, this fan plays a vital role in maintaining indoor air quality and ensuring safety in cooking areas.

One of the standout features of the Greenheck inline centrifugal grease fan is its robust construction. Built with a heavy-gauge galvanized steel housing, the fan is capable of withstanding the rigors of a commercial kitchen, where high temperatures and corrosive elements are prevalent. The fan is also equipped with a specially designed grease collection system that captures grease particles, reducing the risk of fire hazards and ensuring compliance with health and safety regulations.

The inline centrifugal design not only enhances airflow but also promotes quiet operation—a crucial requirement in busy kitchens where noise can be disruptive. The fans are available in various sizes to accommodate different air volume needs, making them versatile solutions for diverse kitchen layouts.

In terms of technology, Greenheck utilizes advanced aerodynamic principles in their fan design, optimizing blade shape and angle to enhance efficiency. The direct-drive design eliminates the need for belts, ensuring lower maintenance costs and increased reliability. The use of premium-efficiency motors further improves energy consumption, making the fan an environmentally friendly option that helps reduce operational costs.

Another significant characteristic of the Greenheck inline centrifugal grease fan is its ease of installation. The fan’s compact and lightweight structure allows for flexible mounting options, including vertical and horizontal orientations, catering to various space constraints in kitchen designs.

The fan is also designed with user accessibility in mind. Maintenance tasks, such as cleaning the grease collection pan, can be performed quickly and efficiently, ensuring that the fan operates at optimal performance levels for extended periods. Additionally, the fan is compliant with NFPA 96 standards, ensuring it meets stringent safety requirements.

In conclusion, the Greenheck Fan Inline Centrifugal Grease Fan combines durability, efficiency, and user-friendly features to create a dependable solution for grease-laden air management in commercial kitchens. Its advanced design and technology make it an essential component for any establishment prioritizing safety, performance, and air quality.
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