Greenheck Fan Optimize Energy Savings with Greenheck Vari-Green Controls
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Heating Cost
Cooling Cost
Fan Operating Cost
Example of potential savings based on a northeast city in the USA using Vari-Green components for variable volume.
Variable
Volume
Constant
Volume
Variable Volume Operating Cost Analysis
Variable Volume vs. Constant Volume $2,000
1,750
1,500
1,250
1000
750
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$0

Vari-Green®Options

Demand Control Ventilation for

Multistory Buildings

Applications requiring constant pressure or variable volume can utilize SQ fans with Vari-Green motors and Vari-Green controls.

Demand control ventilation systems reduce the amount of energy used by decreasing the speed of the fan when demand is low. This in turn lessens the amount

of conditioned air exhausted and further reduces total operating costs associated with air conditioning and heating in multistoried buildings such as: hotels, multifamily complexes, institutional facilities, and high rise commercial buildings.

Vari-Green®Controls

Transformer - Provides 24V power from the existing line voltage at the fan to the Vari-Green motor and controls. Dual voltage primary (120/240V) transformer provided with the fan.

Remote Dial - Allows for remote, manual airflow adjustments. Wall plate with dial may be mounted in a standard 2x4 inch electrical junction box.

Two Speed Control with Integral Transformer Control allows motor rpm to be set at two independent speeds (high or low). Meets minimum airflow requirements with the ability to bump up to high speed in emergency or meet maximum airflow requirements, or reset down to low for energy conservation.

Constant Pressure Control-Indoor - Control Vari- Green motor via static (variable volume) or velocity (constant CFM) pressure on the inlet or outlet side of the fan. Optional, one or two, duct or room probes for use in:

•Multifamily structures - Apartments, condos, hotels; dryers, residential kitchens and bathrooms.

•Institutional facilities - Schools, prisons, multistory office buildings; bathrooms.

The Vari-Green constant pressure control is pre- programed and easy to install for applications that include: venting dryers, bathrooms, residential type kitchen space or industrial process exhaust.

Contact fans@greenheck.com for more information.

Daily Operating Comparison:

Variable Volume and Constant Volume

 

 

 

 

 

 

 

 

Hypothetical (Hotel Bathroom)

 

 

 

 

 

 

 

 

Operation

 

 

 

 

 

 

Variable Volume - Load Shape

 

 

 

 

 

 

 

 

10080$$$$$$$$$$$$$$$$$$$$$$$$

 

 

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Time of Day

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Series 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Demand controlled ventilation offers significant energy savings by exhausting only the necessary amount of air throughout the day.

Operation

 

 

 

 

 

 

 

Constant Volume - Load Shape

 

 

 

 

 

 

 

 

 

 

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Time of Day

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Series 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: A standard VFD compatible motor can also function within a variable volume system.

Constant Pressure Control-Outdoor (previously referred to as GreenVent)

Control Vari-Green motor via static pressure on the inlet side of the fan. Includes one duct probe and transducer for use in:

•Multifamily structures - Apartments, condos, hotels; residential kitchen, dryer facilities and bathrooms.

•Institutional facilities - Schools, prisons, multistory.

Air Quality – VOC - Control a Vari-Green motor via changes in volatile organic compounds (VOC’s). VOC’s are gasses that are emitted from humans, building materials, perfumes, foods, and furniture off-gassing. Range is 0-2000 CO2 ppm equivalent.

•Institutional facilities – Schools, court house, hospitals; bathrooms, waiting rooms, cafeteria.

•Commercial buildings – Office space, conference rooms, bathrooms, break room.

Air Quality – Temperature and Humidity - Control Vari-Green motor via changes in temperature, humidity, or both. Range is 32 to 120°F and 0 to 100% relative humidity.

•Multifamily structures – Apartments, condos, hotels; bathrooms, utility rooms.

•Commercial buildings – Office buildings; office

space, conference rooms, utility rooms, bathrooms.

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Contents Centrifugal Inline Fans Models SQ and BSQ Table of ContentsModel Comparison Standard Construction Features Drive Frame Vari-Green Advantages FeaturesVari-GreenOptions BenefitsTime of Day Demand Control Ventilation for Multistory BuildingsOptions and Accessories Filter Options Model Selection ProcedureModel SQ Model Model BSQ Discharge Configuration Discharge ConfigurationsSide Discharge 243⁄4 ModelBSQ SQ-BSQModel BSQ 13⁄8 51⁄2 63⁄4 25⁄16 SQ-BSQ Base Mount or Hanging IsolatorsSQ-BSQ 13⁄8 51⁄2 63⁄4 25⁄8 VG = Vari-Green Typical InstallationSQ 60-65- Direct Drive SQ 70-75- Direct Drive SQ 80-85- Direct Drive 095 SQ 90-95- Direct Drive090 Damper size = 12 x 100 SQ 100 Direct Drive120 SQ 120 Direct Drive130 SQ 130 Direct Drive140 SQ 140 Direct Drive160 SQ 160 Direct Drive2486 BSQ 70 Belt Drive1530 BSQ 80 Belt Drive2691 BSQ 90 Belt Drive1550 2556 BSQ 100 Belt Drive2490 BSQ 120 Belt Drive1735 BSQ 130 Belt Drive130HP BSQ 130HP Belt Drive2770 7901890 BSQ 140 Belt Drive1615 1340 140HP BSQ 140HP Belt Drive2641 2270 1900 15302001 BSQ 160 Belt Drive160HP BSQ 160HP Belt Drive2321 19901010 BSQ 180 Belt Drive180 1385 1120 BSQ 180HP Belt Drive180HP 200 BSQ 200 Belt Drive1375 990200HP BSQ 200HP Belt Drive1602 1350240 BSQ 240 Belt Drive1070 7301605 BSQ 240HP Belt Drive240HP 300HP BSQ 300 Belt Drive855 967 735 615 495 375770 560 BSQ 300HP Belt Drive811 BSQ 360 Belt Drive360 360HP BSQ 360HP Belt Drive880 775 590670 BSQ 420 Belt Drive420 Remote Dial Model SQLeed information Constant PressureModel BSQ Belt Drive SpecificationsBSQ-300HP and 360HP SQ-75 through 120 BSQ-70 throughThrough 180 SQ-60 through 130 BSQ-130 High Pressure BSQ-130HP through 240HP BSQ-300 through

SQ/BSQ specifications

The Greenheck Fan SQ/BSQ series represents a significant advancement in the realm of ventilation solutions, designed to cater to both commercial and industrial applications. With an emphasis on performance, efficiency, and reliability, these fans have become a go-to choice for engineers and contractors alike.

One of the main features of the SQ/BSQ series is their advanced airflow design. The fans are engineered with high-performance backward-inclined blades, which not only optimize airflow but also minimize noise levels, making them ideal for settings where quiet operation is essential. This design allows the SQ/BSQ fans to handle a wide range of static pressures, delivering consistent airflow even in varying conditions.

Another notable characteristic of the SQ/BSQ fans is their robust construction. Made with high-quality materials, these fans are built to withstand the rigors of industrial environments. The casings are typically constructed from galvanized steel, with optional coatings available for enhanced corrosion resistance. This durability ensures long-lasting performance, reducing the need for frequent replacements and maintenance.

Equipped with the latest motor technology, the SQ/BSQ series offers energy-efficient options that comply with various energy standards. The fans utilize a range of motor types, including premium efficiency and electronically commutated motors (ECM), which contribute to lower operating costs and reduced energy consumption. This focus on energy efficiency aligns with increasing regulatory requirements and environmental considerations.

The SQ/BSQ series also embraces advanced control technologies. Through the integration of variable frequency drives (VFD), users can achieve precise control over fan speed and airflow, allowing for better system optimization. This capability is particularly beneficial in applications where airflow demands fluctuate, ensuring that energy usage remains efficient.

Lastly, Greenheck has prioritized ease of installation and maintenance with the SQ/BSQ models. The fans are designed to facilitate quick installation, featuring accessible service points for maintenance tasks. This ease of access helps reduce downtime and improves overall operational efficiency.

In summary, the Greenheck Fan SQ/BSQ series combines advanced airflow design, robust construction, energy-efficient motor technology, and intelligent control options to deliver a comprehensive and reliable ventilation solution. Whether used in commercial buildings, warehouses, or industrial facilities, these fans stand out for their performance and versatility, making them a preferred choice in the ventilation market.
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