Exhaust Air Balancing Baffles Eabb | Greenheck Fan 452413 specification

Exhaust Air Balancing Baffles (EABB)

This is a guide to assist in determining if multiple hoods on one fan can be balanced to have equal static pressure. For multiple hoods on one fan to achieve their designed exhaust flow, all of the hoods must have equal static pressure at their designed exhaust flow.

The laws of physics force the static pressure for each branch of a duct system on one fan to always be equal. This will happen by the flow rate increasing in low static branches and decreasing in high static branches until the static pressure is equal in all branches.

Checking for Balance

Every hood with Exhaust Air Balancing Baffles (EABB) has a range for its static pressure. The low number in this range is given by the standard calculation for hood static. (Static that is printed with the CAPS submittal). The maximum increase above the low number can be calculated from the duct velocity at the low static, (also given on CAPS submittal). This is then added to the low number to get the highest static pressure possible with an EABB.

The maximum potential increase in static is given in the graph, or can be calculated from:

Max. Increase = 0.00000036 x (Duct velocity)2

After the range for each hood is calculated, it should be compared to the hood with the highest static pressure. If the highest hood falls inside of the range, then the hoods can be balanced with the EABB. If it is higher than the range, the hoods cannot be balanced.

Example 1:

Hood 1: Ps = 0.58 in. wg

Duct Velocity = 1900 FPM

Hood 2: Ps = 0.44 in. wg

Maximum Increase in Static Pressure for Exhaust Air Balancing Baffle

(Fully Closed)

	4.5
	4
Pressure	3.5
Pressure	3
Staitc	2.5
Staitc
in Collar	2
in Collar
Increase	1.5
Increase	1
	0.5
	0
	500	1000	1500	2000	2500	3000	3500

Duct Velocity FPM

Duct Velocity = 1800 FPM

Hood 2 has the lower Ps, at 1800 FPM the maximum increase in Ps is 1.17. The range for Hood 2 is

0.44to 1.61. Hood 1 is less than 1.61 so these hoods can be balanced. Example 2:

Hood 3: Ps = 2.00 in. wg

Duct Velocity = 2000 FPM

Hood 4: Ps = 0.44 in. wg

Duct Velocity = 1500 FPM

Hood 4 has the lower Ps, at 1500 FPM the maximum increase in Ps is .81. The range for Hood 4 is 0.44 to 1.25. Hood 3 is higher than 1.25 so these hoods cannot be balanced.

Note 1: For many systems, an EABB may not be needed on the hood that has the highest static pressure. The exception to this is if the individual ductwork has uneven static pressures.

Note 2: When sizing the fan, use the static pressure from the highest hood and sum the CFM from all the hoods.

17 Canopy Hood

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.