Parallel Flow Fan Powered


VFR Parallel Flow, Fan-Powered, VAV Terminals


​Selection and Layout. The VFR provides flexibility in system design. Reduced noise at the fan terminal allows the system designer to place properly sized units directly above occupied 

Series Flow Fan Powered 


CFR Series Fan-Powered, VAV Terminals:  Quiet operation, constant airflow


The CFR provides flexibility in system design. Reduced noise at the fan terminal allows the system designer to place properly sized units directly above occupied spaces. This will reduce lengthy and expensive discharge duct runs. The standard shallow casing 

CFRQ, Extra Quiet Series Flow, Constant Volume Fan Powered VAV Terminals


Model CFRQ is designed for QUIET, EFFICIENT COMFORT. The CFRQ terminal is specifically designed to eliminate obtrusive fan noise from reaching the occupants, while providing constant air motion in the space. Occupants will benefit from the CFRQ design that minimizes low frequency (125Hz-250Hz) sound levels that typically dominate the space sound level. The CFRQ also minimizes the fluctuation in sound levels that occur during VAV damper modulation.​​


They also offer improved space comfort and flexibility for a wide variety of HVAC systems. CFRQ terminals take advantage of typical benefits provided by series fan terminal units, while performing at extremely low sound levels. This is critical in today’s buildings, where occupants are placing more emphasis on indoor acoustics.


FLEXIBILITY FOR THE BUILDING DESIGNER
Selection and Layout. The CFRQ provides flexibility in system design. Reduced noise at the fan terminal allows the system designer to place properly sized units directly above occupied spaces. It is not necessary to use the crowded space above a hall or corridor to locate the equipment. This will reduce lengthy and expensive discharge duct runs. The standard shallow casing height (14" up to 1000 CFM) minimizes conflict with other systems competing for ceiling space. The FlowStar™ sensor ensures accurate control, even when space constraints do not permit long straight inlet duct runs to the terminal.


​CONVENIENCE FOR THE CONTRACTOR
Quality. All CFRQ terminals are thoroughly inspected during each step of the manufacturing process, including a comprehensive “pre-ship” inspection, to assure the highest quality product available. Each unit is also “run tested” before leaving the factory to ensure trouble free field “start-up.” Quick Installation. A standard single point electrical main power connection is provided. Electronic controls and electrical components are located on the same side of the casing for quick access, adjustment, and troubleshooting. Installation time is minimized with the availability of factory calibrated ENVIRO-TEC controls.


VALUE AND SECURITY FOR THE OWNER
Quality. All metal components are fabricated from galvanized steel. Unlike most manufacturers’ terminals, the steel used in the CFRQ is capable of withstanding a 125 hour salt spray test without showing any evidence of red rust. Energy Efficiency. In addition to quiet and accurate temperature control, the building owner will benefit from lower operating costs. The highly amplified velocity pressure signal from the FlowStar inlet sensor allows precise airflow control at low air velocities.

Maintenance and Service. CFRQ fan terminals require no periodic maintenance other than optional filter replacement. If component replacement becomes necessary, the unit is designed to minimize field labor. The bottom casing panels can be removed to provide easy access to the fan assembly, and the motor electrical leads are easily unplugged.​

CFL Series Fan-Powered, Low-Height, VAV Terminals


Model CFL fan terminals are specifically designed for quiet operation in shallow or congested ceiling spaces. They offer improved space comfort and flexibility for a wide variety of HVAC systems. This is critical in today’s buildings, where occupants are placing more emphasis on indoor acoustics.


​Quick Installation. A standard single point electrical main power connection is provided. Electronic controls and electrical components are located on the same side of the casing for quick access, adjustment, and troubleshooting. Installation time is minimized with the availability of factory calibrated controls.


​Air Balance. Finite fan speed adjustment is accomplished with an electronic SCR controller. The SCR fan speed controller is offered by ENVIRO-TEC and is compatible with the fan motor. This minimizes electronic interference and harmonic distortion that occurs from non-compatible motor and SCR components. Increased motor life and efficiency result from the compatible design.


​Quality. All metal components are fabricated from galvanized steel. Unlike most manufacturers’ terminals, the steel used in the CFL is capable of withstanding a 125 hour salt spray test without showing any evidence of red rust. Energy Efficiency. In addition to quiet and accurate temperature control, the building owner will benefit from  lower operating costs. The highly amplified velocity pressure signal from the FlowStar inlet sensor allows precise airflow control at low air velocities.


​Maintenance and Service. CFL fan terminals require no periodic maintenance other than optional filter replacement. If component replacement becomes necessary, the unit is designed to minimize field labor. Both top and bottom casing panels can be removed to provide easy access to the fan assembly, and the motor electrical leads are easily unplugged.


Controls. Model CFL terminals are available with analog electronic, consignment DDC and Pneumatic controls. ENVIRO-TEC® manufactures a complete line of analog electronic controls specifically designed for use with CFL terminals. These controls are designed to accommodate a multitude of control schemes.

VFL Parallel Fan-Powered, Low-Height, VAV Terminals


Model VFL terminals are available with primary air valves handling up to 3000 CFM. Three fan sizes provide a range of heating capacities between 100 and 1500 CFM. Units are available with multiple primary air valve and fan combinations to meet current industry needs. The standard 

SDL Single-Duct, Low-Height, VAV Terminals: Fit more comfort in less space


Model SDL terminals are only 10" in height, making
them ideal for shallow or congested ceiling plenum
applications. SDL terminals provide variable air volume (VAV) control beyond the typical single duct box. They are specifically designed for precise air delivery throughout the entire operating range. They also offer improved space comfort and flexibility for a wide variety of HVAC applications.

spaces. It is not necessary to use the crowded space above a hall or corridor to locate the equipment. This will reduce lengthy and expensive discharge duct runs. The standard shallow casing height (14" up to 1000 CFM) minimizes conflict with other systems competing for ceiling space. The FlowStar™ sensor ensures accurate control, even when space constraints do not permit long straight inlet duct runs to the terminal. Sizes. Primary air valves and fans are available in various size combinations to provide fan capacities between 20% and 100% of the selected maximum primary airflow. Model VFR terminals are available with primary valves handling up to 4100 CFM. Six fan sizes provide a range of heating capacities between 50 and 2400 CFM.

Enviro Tec VFL Low Height Parallel Fan Powered VAV
Enviro Tec SDR Single Duct VAV

Enviro-Tec VAV Systems




Single Duct Terminals
Series Flow Fan Powered
Parallel Flow Fan Powered

Enviro Tec CFR Series Fan Powered VAV

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Single Duct Terminals


SDR VAV Terminals: Quiet performance with single-duct simplicity


​​VALUE AND SECURITY FOR THE OWNER​
Enviro-Tec SDR terminals offer the typical benefits provided by single-duct units, while performing at extremely low sound levels. This is critical in today’s buildings where occupants are placing more emphasis on indoor acoustics. 

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​height (14" up to 1000 CFM) minimizes conflict with other systems competing for ceiling space. The FlowStar™ sensor ensures accurate control, even when space constraints do not permit long straight inlet duct runs to the terminal. Sizes. Model CFR terminals are available in nine fan sizes to handle airflow capacities between 100 and 4800 CFM. Most fan sizes are available with three primary air valve sizes to optimize the unit fan and primary air valve combinations required by current industry needs.


​​VALUE AND SECURITY FOR THE OWNER

CFR terminals are specifically designed for quiet operation. They also offer improved space comfort and flexibility for a wide variety of heating, ventilating and air-conditioning (HVAC) 
systems. This is critical in today’s buildings where occupants are placing more emphasis on indoor acoustics. Occupants benefit from a CFR design that minimizes low frequency
(125-250 Hz) sound levels that typically dominate the space sound level. Superior flow-measuring allows control at lower minimum cubic-feet-per-minute (CFM) values, which reduces energy
costs and sound levels while maintaining comfort in the occupied space.

FLEXIBILITY FOR THE BUILDING DESIGNER
Due to heightened interest in indoor air quality, many HVAC system designers are focusing on the effects of particulate contamination within a building’s occupied space. Often, HVAC system noise is overlooked as a source of occupied space contamination. The CFR terminal is specifically designed to eliminate obtrusive fan noise from reaching the occupants, while providing constant air motion in the space. The CFR terminal is manufactured and assembled with a multi-axis, multi-point, center-averaging, airflow sensor. This sensor provides a signal to the controller enabling it to quietly and precisely measure airflow.


CFR terminals can be used in these types of applications:

  • Series Fan, Cooling Only
  • Series Fan with Reheat

Model CFR-EH offers electric heat and model CFR-WC offers hot-water heat. Both are available with Electronically Commutated Motor (ECM).

​CONVENIENCE FOR THE CONTRACTOR
All CFR terminals are thoroughly inspected during each step of the manufacturing process, including a comprehensive pre-shipment inspection, to assure the highest quality product
available. Each unit is also run-tested, before leaving the factory, to ensure trouble-free start-up.
The terminals can be installed with metal hanging straps. Hanger brackets, for use with all-thread support rods, or wire hangers are also available. A single-point, power connection, and factory-calibrated controls, minimize installation time. Electronic controls and electrical components are located on the same side of the casing for quick access, adjustment, and trouble-shooting.
Finite fan-speed adjustment is accomplished with an electronic SCR controller.  A calibration label
and wiring diagram is located on the terminal for quick reference during start-up. CFR terminals require no periodic maintenance other than optional filter replacement. If component replacement becomes necessary, the unit is designed to minimize field labor. The bottom casing panels can be removed to provide easy access to the fan assembly, and the motor electrical leads are easily unplugged.

shallow casing height (10 5/8" or 12") minimizes conflict with other systems competing for ceiling space.


​Quality. All metal components are fabricated from galvanized steel. Unlike most manufacturers’ terminals, the steel used in the VFL is capable of withstanding a 125 hour salt spray test without showing any evidence of red rust. 

Energy Efficiency. In addition to quiet and accurate temperature control, the building owner will benefit from lower operating costs. The highly amplified velocity pressure signal from the FlowStar inlet sensor allows precise airflow control at low air velocities.


​Maintenance and Service. VFL fan terminals require no periodic maintenance other than optional filter replacement. If component replacement becomes necessary, the unit is designed to minimize field labor. Both top and bottom casing panels can be removed to provide easy access to the fan assembly, and the motor electrical leads are easily unplugged.

Enviro Tec VFR Parallel Fan Powered VAV
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In addition to quiet and accurate temperature control, the building owner will benefit from lower operating costs. The highly amplified, velocity-pressure signal from the FlowStar™ inlet sensor allows precise airflow control at low air velocities. The FlowStar sensor’s airfoil shape provides minimal pressure drop across the terminal. This allows the central fan to run at a lower pressure and with less brake horsepower, while maintaining occupant comfort.


FLEXIBILITY FOR THE BUILDING DESIGNER​
Enviro-Tec SDR terminals provide variable-air-volume (VAV) control beyond the typical single-duct box. The compact cabinet design and quiet operation give the system designer the option to place units directly above occupied spaces. It is not necessary to locate the unit in the crowded space above a hall or corridor. This reduces lengthy and expensive discharge-duct runs. The SDR terminal provides the ultimate in airflow control with the patented FlowStar airflow sensor. No other sensor in the industry can match the FlowStar’s ability to quietly and precisely measure airflow. The FlowStar sensor ensures accurate control, even when space constraints do not permit long, straight, inlet duct runs to the terminal.

​CONVENIENCE FOR THE CONTRACTOR​
Physical installation is simple with low-profile, compact design and standard metal hanging straps. And control-installation time is minimized with the availability of factory-mounted and calibrated controls. Controls are located on the outside of the unit casing for easy access by maintenance personnel. A standard, single-point, main-power connection is provided with all electronic controls and electrical components located on the same side of the casing, for quick access, adjustment, and troubleshooting.

The FlowStar sensor ensures accurate airflow measurement, regardless of the field-installation conditions. A calibration label and wiring diagram is located on the terminal for quick reference during start-up. SDR terminals require no periodic maintenance and provide trouble-free operation.

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Enviro Tec SDL Low Height Single Duct VAV

SDL terminals take advantage of typical benefits provided by single duct units, while performing at extremely low sound levels. This is critical in today’s buildings, where occupants are placing more emphasis on indoor acoustics.


SDL terminals offer the typical benefits provided by single-duct units, while performing at extremely low sound levels. This is critical in today’s buildings where occupants are placing more emphasis on indoor acoustics. In addition to quiet and accurate temperature control, the building owner will benefit from lower operating costs. The highly amplified, velocity-pressure signal from the FlowStar™ inlet sensor allows precise airflow control at low air velocities. 

For added flexibility, Model SDL terminals with electric heat are invertible. They may be installed with the control enclosure on the left or right, except when position sensitive control options are required (e.g. mercury contactors). 


Model SDL terminals are available in four unit sizes (10, 12, 14 and 16) to handle airflow capacities up to 4100 CFM.

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