Greenheck Fan 240XP-CUb manual Fan Sizing, Exhaust, Supply, Nfpa Considerations

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Commercial Kitchen Ventilation

This drawing shows a commercial kitchen with a typical kitchen ventilation system consisting of a roof mounted CUBE upblast exhaust fan and a Model RSF supply fan.

Exhaust fan variations include the model CWB sidewall exhaust fan (also shown) when penetrating the roof is not practical. The Model SWB utility blower is recommended when higher static pressure capability is required to pull exhaust through long duct runs (typically 3 stories or more).

Fan Sizing

Exhaust

When not specified by local codes, the following guidelines may be used to determine the minimum kitchen hood exhaust cfm. Some local codes require 100 cfm/ft.2 of hood area for wall style hoods.

Supply

Recommended supply airflow is 90% of exhaust cfm. The remaining 10% of supply air will be drawn from areas adjacent to the kitchen, which helps prevent undesirable kitchen odors from drifting into areas such as the dining room.

 

Type of Cooking Equipment

cfm/ft.2 of Hood

 

 

 

 

Light Duty

Oven, Range, Kettle

50

Medium Duty

Fryer, Griddle

75

Heavy Duty

Charbroiler, Electric Broiler

100

Static pressure typically ranges from .625 in. to 1.0 in. for 1 story buildings.

NFPA Considerations

The National Fire Protection Association specifies minimum distance criteria for restaurant exhaust and supply fans as shown below:

10 ft. Horizontal Separation

1. Roof deck to top of exhaust fan windband - 40 in. min.

2. Roof deck to top of curb - 18 in. min.

3. Supply fan intake - 10 ft. min. from all exhaust fans.

3 ft. Horizontal Separation

For applications where the 10 ft. horizontal distance cannot be met, vertical separation between exhaust and supply must be at least 3 feet.

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Contents Fan Selection Application-Based Selection Performance Theory Selecting the Right FAN for the JOB Table of Contents Fan rpm TermsBelt Drive Direct Drive Suffix Motor hp CFM Belt Drive SelectionMotor Information Belt Drive Only AccessoriesDirect Drive Selection CFM Static Pressure / Capacity Model Model RSF and BCF SelectionAcme Competitor Model Number Deciphering HintsDirect Drive vs Belt Drive Basic OverviewFan Model Propeller vs. Centrifugal WheelCommercial Kitchen Ventilation Nfpa Considerations Fan SizingExhaust SupplyGeneral Commercial Ventilation Typical Commercial Ventilation Installations Model RB Model Rbumo General Industrial VentilationModel SB Model RBUModel BSQ High Static Pressure VentilationModel SWB Suggested Air Changes for Proper Ventilation Determining CFM cfmDuctwork Determining Static Pressure PsStability Considerations Preliminary SelectionsDBA Suggested Limits for Room LoudnessInstallation Fan Curve Varying Fan Curve Fan DynamicsVarying System Resistance Curve System Resistance Curve Sample problemVarying Operating Points Operating PointFan Laws

240XP-CUb specifications

The Greenheck Fan 240XP-CUb is a premium addition to the commercial and industrial ventilation market, delivering exceptional performance and reliability. Designed for a variety of applications, the 240XP-CUb combines cutting-edge technology with robust construction to ensure efficient airflow management.

One of the standout features of the 240XP-CUb is its energy efficiency. This model is engineered to minimize energy consumption while maximizing airflow, thanks to advanced motor technology and aerodynamically optimized fan blades. The fan operates with a sound level that is comfortably low, making it an ideal choice for environments where noise reduction is critical, such as schools, hospitals, and office buildings.

The 240XP-CUb is equipped with a high-efficiency, permanent split capacitor (PSC) motor that enhances its overall performance. This type of motor reduces energy costs while providing consistent operation, ensuring longevity and durability. With variable speed options, the fan can be tailored to suit specific application requirements, allowing for better control over airflow and energy use.

In terms of construction, the Greenheck Fan 240XP-CUb is built to last. It features a heavy-duty galvanized steel housing that is resistant to corrosion and can withstand the rigors of commercial use. This ensures that the fan remains reliable in various environments, from manufacturing facilities to food processing plants. The design also includes an easy-access panel for maintenance, further enhancing the unit's user-friendly nature.

Another significant aspect of the 240XP-CUb is its versatility. It can be installed in a range of configurations, including horizontal and vertical orientations, making it suitable for different spaces and applications. Furthermore, it supports a variety of accessories and options that allow for customization, such as inlet guards, dampers, and different mounting configurations.

The Greenheck Fan 240XP-CUb adheres to the latest regulatory standards for efficiency and emissions, making it an environmentally friendly choice for businesses looking to reduce their carbon footprint. With its combination of performance, efficiency, and durability, the 240XP-CUb stands out as a top-tier solution for anyone in need of reliable ventilation solutions. Whether for new installations or retrofits, this fan is designed to meet the demands of modern HVAC systems, ensuring a comfortable and healthy environment.
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