Shop backflow damper

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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
943
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
943
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
1K+
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
1K+
$19.99
$21.99
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
670
$19.99
$21.99
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
670
$21.77
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
613
$21.77
8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
613
$9.77
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
572
$9.77
4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
Amazon.com
572
$26.99
$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
549
20% off
$26.99
$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
549
$16.99
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
Amazon.com
904
$16.99
$17.98
6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
Amazon.com
904
$14.99
$18.99
SOUJOY 2 Pack 4 Inch Backdraft Damper Duct, One-Way Airflow Duct Draft Stopper, Insert Backflow Preventer For Dryer, Ducting In Range Hoods, Bathrooms
Amazon.com
11
21% off
$14.99
$18.99
SOUJOY 2 Pack 4 Inch Backdraft Damper Duct, One-Way Airflow Duct Draft Stopper, Insert Backflow Preventer For Dryer, Ducting In Range Hoods, Bathrooms
Amazon.com
11
$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
52
$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
52
$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
31
$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
31
$16.99
$18.99
[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
2
10% off
$16.99
$18.99
[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
2
$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
144
$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
144
$14.45
FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
Amazon.com
280
$14.45
FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
Amazon.com
280
$25.69
6 Inch HVAC Duct Backdraft Damper, Full Stainless Steel Manual Volume Damper With Sleeve, Adjustable Airflow Control For Range Hoods, Fans, Pellet
Amazon.com
1
$25.69
6 Inch HVAC Duct Backdraft Damper, Full Stainless Steel Manual Volume Damper With Sleeve, Adjustable Airflow Control For Range Hoods, Fans, Pellet
Amazon.com
1
$29.99
Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
Amazon.com
24
$29.99
Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
Amazon.com
24
$46.29
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 8 Inch, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless Steel, For
Amazon.com
79
Free shipping
$46.29
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 8 Inch, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless Steel, For
Amazon.com
79
$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
$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
136
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
136
$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
$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
$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
291
$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
291
$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
$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
$62.69
Dayton 13.75"H-W 4.5"L Aluminum Backdraft Dampr: For 10 in Fan, Single Panel, 13 3/4 in H, 13 3/4 in W Model: 4HX33
Grainger
$62.69
Dayton 13.75"H-W 4.5"L Aluminum Backdraft Dampr: For 10 in Fan, Single Panel, 13 3/4 in H, 13 3/4 in W Model: 4HX33
Grainger
$107.57
Dayton 25"H-W 5.75"L Alu Wall Backdraft Dampr: For 20 in Fan, Single Panel, 25 in H, 25 in W, 2 1/2 in D Model: 53DR11
Grainger
$107.57
Dayton 25"H-W 5.75"L Alu Wall Backdraft Dampr: For 20 in Fan, Single Panel, 25 in H, 25 in W, 2 1/2 in D Model: 53DR11
Grainger
$482.48
Dayton 23.8"H-W 14.5"L Squ Mtrzd Contrl Dampr: For 24 in Dia, 14 1/2 in L, 23 3/4 in H, 23 3/4 in W, Single Model: 5NKK4
Grainger
$482.48
Dayton 23.8"H-W 14.5"L Squ Mtrzd Contrl Dampr: For 24 in Dia, 14 1/2 in L, 23 3/4 in H, 23 3/4 in W, Single Model: 5NKK4
Grainger
$548.38
Dayton 57"H-W 5 1/4"L Aluminum Backdraft Damper: For 54 in Fan, Double Panel, 57 in H, 57 in W, 3 in D Model: 3HHP1
Grainger
$548.38
Dayton 57"H-W 5 1/4"L Aluminum Backdraft Damper: For 54 in Fan, Double Panel, 57 in H, 57 in W, 3 in D Model: 3HHP1
Grainger
$38.00
Silver 8 in Backdraft Damper Insert Backflow Preventer Inline Fan Vent Deflector
eBay
Free shipping
$38.00
Silver 8 in Backdraft Damper Insert Backflow Preventer Inline Fan Vent Deflector
eBay
Free shipping
$38.00
Sliver 6 in Backdraft Damper Insert Backflow Preventer Inline Fan Vent Deflector
eBay
Free shipping
$38.00
Sliver 6 in Backdraft Damper Insert Backflow Preventer Inline Fan Vent Deflector
eBay
Free shipping
$293.37
Dayton 38"H-W Alu Universal Backdraft Dampr: For 36 in Fan, Single Panel, 38 in H, 38 in W, 1 5/8 in D Model: 4C228
Grainger
1
$293.37
Dayton 38"H-W Alu Universal Backdraft Dampr: For 36 in Fan, Single Panel, 38 in H, 38 in W, 1 5/8 in D Model: 4C228
Grainger
1
$32.49
PATIKIL 6 Inch-7 Inch Backdraft Damper 1 Set ABS Flexible Airflow Inline Backflow Duct Adaptor Draft Blocker For Kitchen Bathroom Exhaust Fan Blue
Lowe's
$32.49
PATIKIL 6 Inch-7 Inch Backdraft Damper 1 Set ABS Flexible Airflow Inline Backflow Duct Adaptor Draft Blocker For Kitchen Bathroom Exhaust Fan Blue
Lowe's
$30.29
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
Amazon.com
73
$30.29
PATIKIL HVAC Duct Manual Volume Backdraft Damper, 6 Inch/150Mm, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless
Amazon.com
73
$204.69
Dayton 26"H-W Alu Universal Backdraft Dampr: For 24 in Fan, Single Panel, 26 in H, 26 in W, 1 5/8 in D Model: 4C224
Grainger
$204.69
Dayton 26"H-W Alu Universal Backdraft Dampr: For 24 in Fan, Single Panel, 26 in H, 26 in W, 1 5/8 in D Model: 4C224
Grainger
$104.84
Dayton 19.75"H-W 4.5"L Aluminum Backdraft Dampr: For 16 in Fan, Single Panel, 19 3/4 in H, 19 3/4 in W Model: 5NKN4
Grainger
$104.84
Dayton 19.75"H-W 4.5"L Aluminum Backdraft Dampr: For 16 in Fan, Single Panel, 19 3/4 in H, 19 3/4 in W Model: 5NKN4
Grainger
$82.27
Dayton 16.75"H-W 4.5"L Aluminum Backdraft Dampr: For 12 in Fan, Single Panel, 16 3/4 in H, 16 3/4 in W Model: 4HX76
Grainger
1
$82.27
Dayton 16.75"H-W 4.5"L Aluminum Backdraft Dampr: For 12 in Fan, Single Panel, 16 3/4 in H, 16 3/4 in W Model: 4HX76
Grainger
1
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    Shop backflow damper

    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
    943
    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
    943
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    1K+
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    1K+
    $19.99
    $21.99
    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
    670
    $19.99
    $21.99
    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
    670
    $21.77
    8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    613
    $21.77
    8 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    613
    $9.77
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    572
    $9.77
    4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector
    Amazon.com
    572
    $26.99
    $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
    549
    20% off
    $26.99
    $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
    549
    $16.99
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
    Amazon.com
    904
    $16.99
    $17.98
    6 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Black
    Amazon.com
    904
    $14.99
    $18.99
    SOUJOY 2 Pack 4 Inch Backdraft Damper Duct, One-Way Airflow Duct Draft Stopper, Insert Backflow Preventer For Dryer, Ducting In Range Hoods, Bathrooms
    Amazon.com
    11
    21% off
    $14.99
    $18.99
    SOUJOY 2 Pack 4 Inch Backdraft Damper Duct, One-Way Airflow Duct Draft Stopper, Insert Backflow Preventer For Dryer, Ducting In Range Hoods, Bathrooms
    Amazon.com
    11
    $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
    52
    $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
    52
    $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
    31
    $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
    31
    $16.99
    $18.99
    [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
    2
    10% off
    $16.99
    $18.99
    [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
    2
    $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
    144
    $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
    144
    $14.45
    FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
    Amazon.com
    280
    $14.45
    FRESH SPEED 4-Inch Backdraft Damper Shutter Inline Spring Loaded For Dryer Duct
    Amazon.com
    280
    $25.69
    6 Inch HVAC Duct Backdraft Damper, Full Stainless Steel Manual Volume Damper With Sleeve, Adjustable Airflow Control For Range Hoods, Fans, Pellet
    Amazon.com
    1
    $25.69
    6 Inch HVAC Duct Backdraft Damper, Full Stainless Steel Manual Volume Damper With Sleeve, Adjustable Airflow Control For Range Hoods, Fans, Pellet
    Amazon.com
    1
    $29.99
    Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
    Amazon.com
    24
    $29.99
    Therwen Backdraft Damper Duct Manual Volume Damper With Sleeve Galvanized Sheet Adjustment Airflow Ducting Branch HVAC Air Balancing For Range Hoods,
    Amazon.com
    24
    $46.29
    PATIKIL HVAC Duct Manual Volume Backdraft Damper, 8 Inch, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless Steel, For
    Amazon.com
    79
    Free shipping
    $46.29
    PATIKIL HVAC Duct Manual Volume Backdraft Damper, 8 Inch, Airflow Ducting Branch Vent Damper Air Control Valve, Adjustment Handle Stainless Steel, For
    Amazon.com
    79
    $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
    $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
    136
    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
    136