Shop Backdraft Blocker for Ducts

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$19.98
$24.99
2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
432
20% off
$19.98
$24.99
2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
432
$20.98
2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
Amazon.com
942
$20.98
2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
Amazon.com
942
$39.95
Draft Blocker 10'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
Amazon.com
848
Free shipping
$39.95
Draft Blocker 10'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
Amazon.com
848
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
859
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
859
$19.95
Draft Blocker 5'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
Amazon.com
812
$19.95
Draft Blocker 5'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
Amazon.com
812
$21.77
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
562
$21.77
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
562
$29.69
[Upgraded] Hon&Guan 10 Inch Duct Backdraft Damper, One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker, HVAC Inline Fan Vent
Amazon.com
19
$29.69
[Upgraded] Hon&Guan 10 Inch Duct Backdraft Damper, One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker, HVAC Inline Fan Vent
Amazon.com
19
$29.99
$33.99
Kikerike 10 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
923
11% off
$29.99
$33.99
Kikerike 10 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
923
$9.77
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
924
$9.77
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
924
$16.99
BRDUROBLA 3'' 4'' Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector For
Amazon.com
$16.99
BRDUROBLA 3'' 4'' Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector For
Amazon.com
$18.99
$20.99
MIVIDE 2Pack 4 Inch Backdraft Damper Duct, One Way Airflow Ducting Insert For Ducting In Range Hoods, Bathrooms Fans And Kitchen Fan
Amazon.com
109
$18.99
$20.99
MIVIDE 2Pack 4 Inch Backdraft Damper Duct, One Way Airflow Ducting Insert For Ducting In Range Hoods, Bathrooms Fans And Kitchen Fan
Amazon.com
109
$17.99
[Upgraded] Hon&Guan Duct Damper 4 Inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer For 4 Inch Duct Dryer Vent Hose-2Pcs
Amazon.com
144
$17.99
[Upgraded] Hon&Guan Duct Damper 4 Inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer For 4 Inch Duct Dryer Vent Hose-2Pcs
Amazon.com
144
$37.99
Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
Amazon.com
55
Free shipping
$37.99
Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
Amazon.com
55
$16.99
[Upgraded] Hon&Guan 6 Inch Backdraft Damper, One-Way Airflow Duct Damper 6 Inch Ducting Insert Backflow Preventer Duct Draft Blocker
Amazon.com
173
$16.99
[Upgraded] Hon&Guan 6 Inch Backdraft Damper, One-Way Airflow Duct Damper 6 Inch Ducting Insert Backflow Preventer Duct Draft Blocker
Amazon.com
173
$29.39
$48.99
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way
eBay
Free shipping
40% off
$29.39
$48.99
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way
eBay
Free shipping
$14.45
FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
Amazon.com
100
$14.45
FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
Amazon.com
100
$17.99
AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 4" Ducting In Range Hoods And Bathrooms Fans
Amazon.com
471
$17.99
AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 4" Ducting In Range Hoods And Bathrooms Fans
Amazon.com
471
$27.99
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
Amazon.com
86
$27.99
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
Amazon.com
86
$8.77
Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington
harfington
$8.77
Backdraft Damper, Metal HVAC Ducting Insert Backflow Preventer Draft Blocker Duct Adaptor For Kitchen Bathroom Exhaust Fan | Harfington
harfington
$17.90
7 Inch Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC, Red | Harfington
harfington
$17.90
7 Inch Metal Backdraft Damper, Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC, Red | Harfington
harfington
$450.47
Dayton 63.75"H-W 4.5"L Aluminum Backdraft Dampr: For 60 in Fan, For 64 in Nominal Duct Dia, Double Panel Model: 5NKN9
Grainger
$450.47
Dayton 63.75"H-W 4.5"L Aluminum Backdraft Dampr: For 60 in Fan, For 64 in Nominal Duct Dia, Double Panel Model: 5NKN9
Grainger
$27.99
AC Infinity 8" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 8" Ducting In Range Hoods And Bathrooms Fans
Amazon.com
1K+
$27.99
AC Infinity 8" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 8" Ducting In Range Hoods And Bathrooms Fans
Amazon.com
1K+
$11.99
FRESH SPEED 4 Inch Professional Backdraft Damper Shutter Connector Duct
Amazon.com
236
$11.99
FRESH SPEED 4 Inch Professional Backdraft Damper Shutter Connector Duct
Amazon.com
236
$24.99
Aulmscn 4 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper For HVAC Ventilation
Amazon.com
12
$24.99
Aulmscn 4 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper For HVAC Ventilation
Amazon.com
12
$15.87
6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$15.87
6" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$22.99
Aulmscn 3 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper For HVAC Ventilation
Amazon.com
12
$22.99
Aulmscn 3 Inch HVAC Duct Manual Volume Backdraft Damper,Stainless Steel Airflow Control Valve With Adjustment Handle,Duct Damper For HVAC Ventilation
Amazon.com
12
$9.57
4 Inch Backdraft Damper, Stainless Steel Flexible Airflow Ducting Insert Backflow Preventer Draft Blocker For Kitchen Bathroom Exhaust Fan, Silver |
harfington
$9.57
4 Inch Backdraft Damper, Stainless Steel Flexible Airflow Ducting Insert Backflow Preventer Draft Blocker For Kitchen Bathroom Exhaust Fan, Silver |
harfington
$13.70
4" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$13.70
4" Backdraft Damper, 1 Set Stainless Steel Airflow Ducting Insert Backflow Preventer Draft Blocker With Clamps For Kitchen Bathroom Exhaust Fan |
harfington
$23.99
PATIKIL 7 Inch Metal Backdraft Damper Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC Red
Lowe's
$23.99
PATIKIL 7 Inch Metal Backdraft Damper Airflow Backflow Preventer Vent Draft Blocker Duct Connector For Kitchen Bathroom Exhaust Fan HVAC Red
Lowe's
$23.99
PATIKIL 4 Inch Backdraft Damper Control Valve, Duct Manual Volume Adjustment Airflow Ducting For Fan Airflow, Dryer Vent, Range Hood, White
Amazon.com
$23.99
PATIKIL 4 Inch Backdraft Damper Control Valve, Duct Manual Volume Adjustment Airflow Ducting For Fan Airflow, Dryer Vent, Range Hood, White
Amazon.com
$29.89
TOP-VIGOR 8 Inch HVAC Duct Manual Volume Backdraft Damper, Galvanized Iron Airflow Control For HVAC, Range Hoods, Fans, Pellet Stove Pipes, Dryer
Amazon.com
11
$29.89
TOP-VIGOR 8 Inch HVAC Duct Manual Volume Backdraft Damper, Galvanized Iron Airflow Control For HVAC, Range Hoods, Fans, Pellet Stove Pipes, Dryer
Amazon.com
11
$23.99
PATIKIL 6 Inch Backdraft Damper Stainless Steel Flexible Airflow Ducting Insert Backflow Preventer Draft Blocker For Kitchen Bathroom Exhaust Fan
Lowe's
$23.99
PATIKIL 6 Inch Backdraft Damper Stainless Steel Flexible Airflow Ducting Insert Backflow Preventer Draft Blocker For Kitchen Bathroom Exhaust Fan
Lowe's
$15.99
Draft Blocker - Backdraft Damper Duct - Draft Stopper - Backflow Preventer - ...
eBay
Free shipping
$15.99
Draft Blocker - Backdraft Damper Duct - Draft Stopper - Backflow Preventer - ...
eBay
Free shipping
$33.90
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Duct...
eBay
Free shipping
$33.90
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Duct...
eBay
Free shipping
$14.83
4 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker Backflow Ducting
eBay
Free shipping
$14.83
4 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker Backflow Ducting
eBay
Free shipping
$135.44
Dayton 29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia, Single Panel Model: 3HHL8
Grainger
$135.44
Dayton 29.75"H-W 4.5"L Aluminum Backdraft Dampr: For 30 in Fan, For 30 in Nominal Duct Dia, Single Panel Model: 3HHL8
Grainger
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    Shop Backdraft Blocker for Ducts

    Sponsored
    About our ads
    $19.98
    $24.99
    2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    432
    20% off
    $19.98
    $24.99
    2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    432
    $20.98
    2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
    Amazon.com
    942
    $20.98
    2 Pcs 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
    Amazon.com
    942
    $39.95
    Draft Blocker 10'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
    Amazon.com
    848
    Free shipping
    $39.95
    Draft Blocker 10'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
    Amazon.com
    848
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    859
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    859
    $19.95
    Draft Blocker 5'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
    Amazon.com
    812
    $19.95
    Draft Blocker 5'' Inch - Backdraft Damper - Draft Stopper - Backflow Preventer - Inline Fan Vent Deflector - One-Way Airflow Ducting - Dryer Duct
    Amazon.com
    812
    $21.77
    8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    562
    $21.77
    8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    562
    $29.69
    [Upgraded] Hon&Guan 10 Inch Duct Backdraft Damper, One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker, HVAC Inline Fan Vent
    Amazon.com
    19
    $29.69
    [Upgraded] Hon&Guan 10 Inch Duct Backdraft Damper, One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker, HVAC Inline Fan Vent
    Amazon.com
    19
    $29.99
    $33.99
    Kikerike 10 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    923
    11% off
    $29.99
    $33.99
    Kikerike 10 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    923
    $9.77
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    924
    $9.77
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    924
    $16.99
    BRDUROBLA 3'' 4'' Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector For
    Amazon.com
    $16.99
    BRDUROBLA 3'' 4'' Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector For
    Amazon.com
    $18.99
    $20.99
    MIVIDE 2Pack 4 Inch Backdraft Damper Duct, One Way Airflow Ducting Insert For Ducting In Range Hoods, Bathrooms Fans And Kitchen Fan
    Amazon.com
    109
    $18.99
    $20.99
    MIVIDE 2Pack 4 Inch Backdraft Damper Duct, One Way Airflow Ducting Insert For Ducting In Range Hoods, Bathrooms Fans And Kitchen Fan
    Amazon.com
    109
    $17.99
    [Upgraded] Hon&Guan Duct Damper 4 Inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer For 4 Inch Duct Dryer Vent Hose-2Pcs
    Amazon.com
    144
    $17.99
    [Upgraded] Hon&Guan Duct Damper 4 Inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer For 4 Inch Duct Dryer Vent Hose-2Pcs
    Amazon.com
    144
    $37.99
    Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
    Amazon.com
    55
    Free shipping
    $37.99
    Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
    Amazon.com
    55
    $16.99
    [Upgraded] Hon&Guan 6 Inch Backdraft Damper, One-Way Airflow Duct Damper 6 Inch Ducting Insert Backflow Preventer Duct Draft Blocker
    Amazon.com
    173
    $16.99
    [Upgraded] Hon&Guan 6 Inch Backdraft Damper, One-Way Airflow Duct Damper 6 Inch Ducting Insert Backflow Preventer Duct Draft Blocker
    Amazon.com
    173
    $29.39
    $48.99
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way
    eBay
    Free shipping
    40% off
    $29.39
    $48.99
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way
    eBay
    Free shipping
    $14.45
    FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
    Amazon.com
    100
    $14.45
    FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
    Amazon.com
    100
    $17.99
    AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 4" Ducting In Range Hoods And Bathrooms Fans
    Amazon.com
    471
    $17.99
    AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert With Spring-Loaded Folding Blades For 4" Ducting In Range Hoods And Bathrooms Fans
    Amazon.com
    471
    $27.99
    PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
    Amazon.com
    86
    $27.99
    PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
    Amazon.com
    86