Vari-GreenControls, Demand Control Ventilation

Options

Example: Initial Cost Comparison

Belt Drive vs. Direct Drive Vari-Green

		GB-121
		G-123-VG

$0	100		200	300	400	500	600	700
			Fan Price			VFD Price

The diagram shows how the overall cost of a fan with a direct drive Vari-Green motor is less than the cost to purchase a belt drive and add a VFD to it.

Vari-Green™Controls

Remote mounted dial — wall mounted dial allows fan to be controlled at point of use and includes

a transducer..

Demand Control Ventilation

for multi-story buildings

Applications requiring constant pressure

control or variable volume as used in multi-storied buildings such as hotels, multi-family complexes, institutional

facilities, and high rise commercial buildings, may utilize G fans with Vari-Green™ motor and Vari-Green™ control..

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

Refer to the GreenVent Systems brochure for more detailed information on benefits and energy savings.

Two-speed control — provides the ability to preset a high and low at the fan and control with a timed position switch at the point of use.

Transformer — reduces 115V power to 24V power

Constant pressure — maintains negative pressure (-1.0 wg to = 1.0 wg) for applications such as bathrooms, dryers, filters, etc..

Variable Volume vs. Constant Volume
$2,000-
1,750-
1,500-
1,250-
1,000-
750-
500-
250-
$-	Variable Volume		Constant Volume
	Variable Volume		Constant Volume
Heating Cost ($/yr)		Cooling Cost ($/yr)		Fan Operating Cost

Example

Cost/Savings

Comparisons

Example of potential saving based on a northeast city in the USA using a GreenVent System.

LEED information

Greenheck became one of the first manufacturers in the Air Movement and Control industry to join the LEED/green movement when they joined the United States Green Building Council (USGBC) in 2005.. Greenheck has been actively researching qualification requirements for our products to meet LEED credits and prerequisites..

The Vari-Green™ motor significantly helps qualification efforts for the Energy and Atmosphere credits and

prerequisites — specifically credit one, Optimize Energy Performance and prerequisite two, Minimum Energy Performance.

Demand controlled systems reduce the energy consumed by decreasing the speed of the fan and energy used by the motor.. The system controls will lessen the amount of conditioned air that is exhausted, further reducing the total operating costs..

A 0-10 VDC control signal is easily used in conjunction with:

• BAS - Building Automation System

• GreenVent System Controls - for constant pressure

• CO2 Sensors - Monitors carbon dioxide levels

• VOC Sensors - Monitors a range of volatile organic compounds

• Motion Detectors - Monitors occupancy

For additional information refer to the Vari-Green

Motor brochure.