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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.​​


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).

Standard Features:

Construction

  • AHRI Standard 880-certified and labeled
  • 22-gauge, galvanized-steel casing and valve
  • 3/4” thick, fiberglass insulation, mechanically fastened for added security

Hot-Water Coils

  • 1, 2, 3, 4-row coils
  • Tested at a minimum of 350 psig under water

Fan Assemblies

  • Forward-curved, dynamically-balanced, direct-drive, galvanized blower wheel
  • 115 to 277-volt, single-phase, three-tap, permanent-split capacitor (PSC) motor
  • SCR fan-speed controller
  • Quick-select, motor-speed terminal
  • Permanently lubricated motor bearings
  • Thermally protected motor
  • Vibration-isolation motor mounts
  • Single-point wiring

Primary Air Valve

  • Embossed rigidity rings
  • Low-thermal-conductance damper shaft with position indicator
  • Mechanical stops for open and closed position
  • Multi-point, center-averaging, airflow sensor
  • Balancing tees

Electrical Components

  • cETL listed for safety compliance with UL 1996
  • National Electrical Manufacturers Association (NEMA) Type 1 wiring enclosure

Electric Heat

  • cETL listed as an assembly for safety compliance
  • Integral, electric-heat assembly
  • Automatic-reset primary and back-up secondary thermal limits
  • Single-point-power connection
  • Hinged, electrical-enclosure door
  • Fusing per NEC
  • Ni-chrome elements
  • Wiring diagram and ETL label
  • Fan-interlock device (relay or pneumatic-electric [PE] switch)


OPTIONAL FEATURES:
Construction

  • 20-gauge, galvanized-steel construction
  • 1” insulation
  • Scrim-reinforced, foil-faced insulation meeting American Society for Testing and Materials (ASTM) C1136 for mold, mildew, and humidity resistance
  • 1/2” thick elastomeric closed cell foam insulation
  • Double-wall construction with 22-gauge liner
  • Mounting brackets to accept all threaded hanging rods or wire hangers
  • Low-temperature construction for use in thermal-storage applications, including a thermally-isolated, primary air inlet and a composite damper shaft
  • Low-velocity, low-pressure-drop, filter rack and filters located at induction inlet and/or radiated sound damper
  • Hot-water, steam, or electric heating coils mounted at unit discharge—access plate upstream of hydronic coil (standard)

Fan Assemblies

  • 208, 230, 240 and 480-volt, single-phase, PSC motors
  • 220/240-volt, 50 Hz motors
  • 120, 208, 240, and 277-volt ECM™ motors

Electrical Components

  • Full-unit, toggle disconnect and inline motor fusing
  • Primary and secondary transformer fusing

Electric Heat

  • Proportional, solid-state-relay (SSR) heater control
  • Disconnect (toggle or door-interlocking)
  • Pneumatic-electric (PE) switches
  • Magnetic contactors
  • Manual-reset secondary limit
  • Airflow switch

Controls

  • Factory-provided controls include:

             - Pneumatic controls
             - Analog electronic controls

  • Consignment DDC controls (factory-mount and wire controls provided by others)

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 ​height (14" up to 1000 CFM)

Enviro-Tec 



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


          Steve Lewis LLC dba

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33 Years of Combined Experience
361-882-2233

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


Model CFRQ is designed for QUIET, EFFICIENT COMFORT. Model CFRQ fan terminals are specifically designed for extra quiet operation. They also offer improved space comfort and flexibility for a wide variety of HVAC systems.


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. Sizes. Model CFRQ terminals are available in seven fan sizes to handle airflow capacities between 200 and 3100 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. Sensitive controls are required (e.g. mercury contactors), the internal fan deck is removed and reinstalled inverted, allowing the entire unit to be installed in an inverted fashion. This provides the contractor an option other than re-ordering a unit, or offsetting the duct spaces, possibly saving time, money, and degradation of overall system performance. The terminal is constructed to allow installation with standard metal hanging straps. Optional hanger brackets for use with all-thread support rods or wire hangers are also available.


​STANDARD FEATURES
Construction

  • AHRI 880 certified and labeled
  • 22 gauge galvanized steel casing and valve
  • 3/4" thick fiberglass insulation
  • Large access opening allowing removal of complete vfan assembly for all heating coil options
  • Radiated sound damper

Fan Assembly

  • Forward curved, dynamically balanced, direct drive, galvanized fan wheel
  • 115 or 277 volt single phase, three tap PSC motor
  • SCR fan speed controller
  • Quick-select motor speed terminal
  • Permanently lubricated motor bearings
  • Thermally protected motor
  • Vibration isolation motor mounts
  • Single point wiring

Primary Air Valve

  • Embossed rigidity rings
  • Low thermal conductance damper shaft
  • Position indicator on end of damper shaft
  • Mechanical stops for open and closed position
  • FlowStar™ center averaging airflow sensor
  • Balancing tees
  • Plenum rated sensor tubing

Hot Water Coils

  • Coils are designed, manufactured, and tested by ENVIRO-TEC
  • AHRI 410 certified and labeled
  • 1, 2, 3, 4 row coils
  • Tested at a minimum of 450 PSIG under water and rated at 300 PSIG working pressure at 200°F
  • Left or right hand connections

Electrical

  • cETL listed for safety compliance
  • NEMA 1 wiring enclosure

Electric Heat

  • cETL listed as an assembly for safety compliance per UL 1995
  • Integral electric heat assembly
  • Automatic reset primary and back-up secondary thermal limits
  • Single point power connection
  • Hinged electrical enclosure door
  • Fusing per NEC


OPTIONAL FEATURES
Construction

  • 20 gauge galvanized steel construction
  • 1" insulation
  • Foil faced scrim backed insulation
  • 1/2" thick elastomeric closed cell foam insulation
  • Double wall construction with 22 gauge liner
  • 1" throwaway filter

Fan Assembly

  • 208-230 volt PSC motor
  • 220-240 volt 50 Hz motor
  • 120, 208, 240 and 277 volt ECM™ fan motor

Electrical

  • Full unit toggle disconnect
  • Inline motor fusing
  • Primary and secondary transformer fusing

Electric Heat

  • Proportional (SSR) heater control
  • Mercury contactors
  • Door interlocking disconnect switches

Controls

  • Factory provided controls include:

             - Analog electronic
             - Pneumatic

  •  Consignment DDC controls (factory mount and wire controls provided by others)

Enviro-Tec Series Flow Fan Powered VAV

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CFL Series Fan-Powered Low-Height VAV Terminals


Low Height Applications
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. 


​STANDARD FEATURES
Construction

  • AHRI 880 certified and labeled
  • Galvanized steel construction
  • Casing: 20 gauge
  • 1/2” thick fiberglass insulation
  • Large top and bottom access openings allowing removal of complete fan assembly for all heating coil options

Fan Assembly

  • Forward curved, dynamically balanced, direct drive, galvanized blower wheel
  • 115, 208/230 or 277 volt single phase, three tap
  • PSC motor
  • SCR fan speed controller
  • Quick-select motor speed terminal
  • Permanently lubricated motor bearings
  • Thermally protected motor
  • Vibration isolation motor mounts
  • Single point wiring

Primary Air Valve

  • Round inlets: 22 gauge galvanized steel with embossed rigidity rings
  • Rectangular inlets: 18 gauge galvanized steel construction
  • Low thermal conductance damper shaft
  • Position indicator on end of damper shaft
  • Mechanical stops for open and closed position
  • FlowStar™ center averaging airflow sensor
  • Balancing tees

Hot Water Coils

  • AHRI 410 certified and labeled
  • 1, 2, 3, or 4 row coils
  • Left or right hand connections
  • Tested at a minimum of 450 PSIG under water and rated at 300 PSIG working pressure at 200°F

Electrical

  • cETL listed for safety compliance with UL 1995
  • NEMA 1 wiring enclosure

Electric Heat

  • Unit is invertible and may be installed with controls on left or right, except with mercury contactor option
  • cETL listed as an assembly for safety compliance per UL 1995
  • Automatic reset primary and back-up secondary thermal limits
  • Single point power connection
  • Hinged electrical enclosure
  • Fusing per NEC


OPTIONAL FEATURES
Construction

  • Foil faced scrim backed insulation
  • Elastomeric closed cell foam insulation
  • Double wall construction with 22 gauge liner
  • 1” filter rack with throwaway filter

Fan Assembly

  • 220/240 volt 50 Hz PSC motor
  • 120, 208, 240 and 277 volt ECM™ motors

Electrical

  • Full unit toggle disconnect
  • Inline motor fusing
  • Primary and secondary transformer fusing

Electric Heat

  • Proportional (SSR) heater control
  • Mercury contactors (unit may not be inverted)
  • Door interlocking disconnect switches

Controls

  • Factory provided controls include:

             - Analog electronic
             - Pneumatic

  • Consignment DDC controls (factory mount and wire controls provided by others)
Enviro Tec CFR Series Fan Powered VAV
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