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Volko Supply

is your  Auto-Draft®

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Servicing Home Owners & Contractors since 1948

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Duct Booster® Brand Duct fans
Your Best Value for boosting air flow in ducts or for powered air intakes and exhausts.

Residential and Commercial Sizes. 
Quality construction, Economically priced.
 
  • Boosts air flow in hard to heat or cool rooms.
  • Models for ducts 5" through 14".
  • Models EF-6 through EF-14 may be used as exhaust or air intake fans.
  • Easy installation in both metal and flex duct.
  • Optional speed and Duct Airstat operating controls.
  • Quiet, smooth operation.
  • Commercial/ Residential    
    Duct Booster Fan
    Out Door Air Supply
    Lunch Room Exhauster
    Pole Barn Warehouse Exhaust
    Spot Ventilation
    Bathroom Exhaust
    Fume Control systems
      Booster Installation

     

    Click here for Prices, Quotes & E-mail at info@volko.com

    Optional Controls

     Model PS1503 Duct Airstat   Model SC-1 Speed Control
    • Senses positive pressure from central blower
    • Works year-round for both heating and a/c
    • Simplifies wiring
     
    Accessories
    • Use to turn Duct Fans on/off and to vary motor RPM
    • Can be used with PS1503 Duct Airstat.
    • Can be used with Models EA-5, EF-6, EF-8, and EF-10
     
    Selection Table
                                                                                                           DUCT LENGTH IN FEET
    Model
     
    Motor Specifications
    25 Feet
    CFM
    50 Feet
    CFM
    75 Feet
    CFM
    Free Air
    CFM
    DB-2, 6" Duct 
    DB-2, 8" Duct
     
    120V      1/70 HP  .51A
    150
    250
    100
    220
    95
    180
    200
    275
    EA-5  
    120V     30 Watt   .40A
    150
    100
    90
    180
    EF-6  
    120V      30 Watt   .40A
    150
    100
    90
    180
    EF-8  
    120V      56 Watt    1.1A
    300
    250
    200
    325
    EF-10  
    120V      1/100 HP  .46A
    400
    325
    275
    475
    EF-12  
    120V     1/35 HP    1.25A
    800
    700
    600
    875
    EF-14  
     120V     1/25 HP     1.70A
    1100
    1000
    900
    1200
    1. Table is based on straight metal duct.  90 Degree elbows are equivalent to 10 feet of straight duct.
        Performance based on 70 degrees F. standard air.
    2. The model DB-2 can be installed in round ducts up to 8", rectangular ducts as shallow as 3 1/4".
    3. The model EA-5 can be installed in either round or rectangular ducts 6" or larger.
    4. The number after EF-matches the round duct diameter.  Example EF-8 connects to 8" round duct.
    5. For complete dimension and performance specifications consult our technical service department.

     

    HIGH PRESSURE DUCT BOOSTER® EXHAUST FANS

    Versatile and durable Tjernlund M and P-Series Fans feature high pressure air handling performance with low noise and extremely low power usage.

    M-Series fans (metal housing) are ideal for long runs or air supply and exhaust applications requiring exacting performance.  Use P-Series fans (plastic housing) as ultimate bathroom/spa exhausters to eliminate fogged mirrors and lingering odors, super quiet.  They also work great for exhausting high moisture areas such as sub-slab radon gas mitigation and dryer vent boosting.


     
    Combine these inline fans with our accessories to create complete duct fan, 
    supply air and exhausting systems.

    G-Series Grills:
    White plastic, dual purpose grills with
    mounting
    collars  (4,6,8" Duct Sizes)

     

    Accessories

     

     BD-Series Back Draft Dampers:
    Galvanized steel, spring
    loaded dampers prevent
    backdrafts. (4,6,8"Duct Sizes)
     
     
     
    M-Series (Metal) Performance
    Model
    Motor
    HP
    Watts
    RPM
    Volts
    CFM VS Static Pressure
    0"       1/8"    1/4"    3/8"     1/2"     3/4"    1"     1 1/2"   2"
    Duct 
    Dia.
    Weight
    M-4
    1/30
    48
    3140
    115
    122     111      86       74         61        18       --        --         --
    4"
    6 LBS.
    M-6
    1/20
    90
    2500
    115
    270     250      235     204      180       138    107      --          --
    6"
    7 LBS.
    M-8
    1/15
    120
    2150
    115
    498     470      447     399      350       296   194      93          --
    8"
    9 LBS.

     
    Dimensional Data
    Model
    OD
    d
    a
    M Series
    M-4
    8
    4
    6 1/2
    M-6
    11 1/2
    6
    5 1/2
    M-8
    13 1/4
    8
    6 1/4
     

    P-Series (Plastic) Performance

    Model
    Motor
    HP
    Watts
    RPM
    Volts
    CFM VS Static Pressure
    0"     1/8"   1/4"    3/8"   1/2"    3/4"    1"  1 1/2"   2"
    Duct
    Dia.
    Sones
    Weight
    P-4
    1/30
    48
    3140
    115
    150   130     100      78      68        60      --       --        --
    4"
    --
    6 LBS.
    P-6
    1/20
    90
    2500
    115
    270    255     235    200     180     140    110     --        --
    6"
    2.1
    8 LBS.
    P-8
    1/15
    100
    2150
    115
    410    375     340    285     225     180    135     --        --
    8"
    3.2
    11 LBS.

     
    Dimensional Data
    Model
    OD
    d
    a
    P Series
    P-4
    9 1/2
    3 7/8
    5 1/4
    P-6
    11 3/4
    5 3/4
    5 7/8
    P-8
    13 1/4
    8
    6 1/4

     

    Click here for Prices, Quotes & E-mail at info@volko.com

     

         

     

     

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    Chimney Fans Crawlspace Fans Chimney Caps Chimney Dampers wood vents copper stuff

    The Exhausto RS residential type chimney top mounted fan to be used in conjunction with wood, gas, oil and coal fired appliances. The fan can be used with fireplaces, fireplace inserts, stoves, ovens, BBQ's, water heaters, furnaces, small boilers and more.

    Volko fireplace & chimney caps...large selection of chimney cap cover solutions...Weathershield Chimney Caps Chimalator top sealing chimney dampers. Click to visit Volko.com and see a wonderful collection of Wood Floor Vents Click to visit Volko.com and see a wonderful collection of quality home items

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