High Velocity Cartridge Filters

A. Exhaust

With all the filters in place, determine the total hood exhaust volume with a Shortridge meter as follows:

1.All cooking equipment should be on. If the hood has internal short circuit make-up air, it should be turned off.

2.Measuring Velocities

Set up the Shortridge meter. Leave all holes of

Velgrid open. Do NOT tape over holes that are not over openings. The conversion factor takes this into account.

Position the grid over each filter as shown.

Take velocity readings for each filter.

3.*Calculate each filter’s volumetric flow rate by summing the flow rate of each individual filter in the hood.

4.*Calculate the total hood’s volumetric flow rate by

summing the flow rate of each individual filter in the

Fig. 37

hood.

 

*Note: For best accuracy multiply the velocity of each filter by its conversion factor and sum the flow rates. Averaging the velocity measured for all filters may cause error.

Nominal Filter Size (H x L)

Imperial

Metric

Inches

Millimeters

Conversion Factor

Conversion Factor

 

 

 

 

16 x 16

400 x 400

1.22 ft2

.113 m2

16 x 20

400 x 500

1.67 ft2

.155 m2

20 x 16

500 x 400

1.21 ft2

.112 m2

20 x 20

500 x 500

1.50 ft2

.139 m2

Example: Measured velocities for 20 x 20 filter = 282 fpm (5157 m/hr)

Flow rate for one filter

=

Conversion

x

Average

 

 

 

 

Factor

 

Velocity

 

 

(Imperial)

=

1.50

x

282 fpm

=

423.0 cfm

(Metric)

=

.139

x

5157 m/hr

=

717 m3/hr

Total hood flow rate =

(Filter 1 Flow Rate) +

… + (Filter X Flow Rate)

=

423.0 + 421.8 + 420.7 + 418.2 = 1683.7 cfm

=

717 + 717 + 715 + 711

= 2860 m3/hr

1/2 width

1/2 height

Fig. 38

23 Canopy Hood

®

Page 23
Image 23
Greenheck Fan 452413 manual fpm 423.0 cfm

452413 specifications

The Greenheck Fan 452413 is a well-known model in the ventilation and air movement industry. Renowned for its durability and high performance, this fan is designed for commercial and industrial applications, ensuring optimal air flow and energy efficiency.

One of the standout features of the Greenheck Fan 452413 is its rugged construction. Made with robust materials that withstand harsh environments, this fan is built to last. Its housing is often constructed from galvanized steel, offering excellent resistance to rust and corrosion. This makes it suitable for various applications, from rooftop installations to indoor ventilations systems.

The fan's motor is another highlight. It typically includes high-efficiency motors that not only enhance performance but also help in reducing energy consumption. The Greenheck Fan 452413 often employs variable speed drives, allowing users to adjust the fan speed according to specific requirements. This flexibility facilitates energy savings and ensures optimal performance, especially in varying load conditions.

Noise reduction technology is also a focal point in the design of the Greenheck Fan 452413. The fan is engineered to operate quietly, which is crucial for environments where noise levels must be minimized, such as in residential areas, hospitals, or schools. The incorporation of innovative blade design reduces turbulence, resulting in lower operational noise without compromising airflow.

Another characteristic of the 452413 model is its ease of maintenance. Designed with user convenience in mind, the fan typically features access panels that allow for straightforward inspections and repairs. This design reduces downtime, ensuring that the ventilation system runs effectively without frequent interruptions.

Furthermore, Greenheck provides extensive customization options. The 452413 can be tailored to meet specific requirements, including size, airflow capacity, and additional features such as controls and accessories. This adaptability makes the fan a preferred choice across different sectors, including hospitality, manufacturing, and healthcare.

In summary, the Greenheck Fan 452413 stands out in the market due to its robust construction, energy-efficient motor technology, noise reduction capabilities, and ease of maintenance. Its versatility in customization further solidifies its position as a reliable solution for various ventilation needs, catering to both performance and efficiency in demanding environments. This fan embodies the quality and innovation that Greenheck is known for, ensuring a top-choice option for those seeking effective air movement solutions.