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Flex Ducting

Installing flexible ducting in a house or commercial building makes connecting its air ways safer and easier. In addition, such products let you reduce the number of elbows in the system thus making it generally more efficient. Westside Wholesale offers wide selection of high quality Flexible Duct from the leading manufacturers. Items for sale include products from such brands as Hart & Cooley, Fantech and Smart that offer metalized insulated flexible duct to fit 4”, 6” and 8” diameter appliances.

The insulation layer that surrounds the duct from the inside provides optimized temperature control for both cold and hot environment, which is a great feature that won’t let the temperature affect your attic or walls. Needless to say that such insulation is formaldehyde-free, which is also great since it improves indoor air quality in heating and cooling applications where flexible duct is used.

Each Flexible Duct item offered at Westside Wholesale provides protection from mold and mildew, strengthening the system throughout its lifetime. Not only do you not need to pay for coatings, since Flexible Duct is free of upcharges, you get outstanding thermal protection provided by the polyester core encapsulated with high carbon steel. You can forget about the mold and microbes in your air-handling system applications, because the moment you purchase Flexible Duct from Westside Wholesale and install it, you will never again need to deal with mold, unwanted vapor, tears and bacteria.

By offering such versatile choice of Flexible Duct Westside Wholesale provides its customers with the best options they could find on today’s market. Each item offered in this online store is backed up by manufacturer’s warranty, is GreenGuard certified, has reasonable price and can oftentimes be purchased with additional discount. Westside Wholesale also offers free shipping on items ordered in a bundle, which allows saving even more money and time.

54 products Sort by 

Fantech FIDT4

Fantech FIDT4

Fantech 25' of Insulated Flexible 4" Round Duct

Regular Price: $29.49
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech DBLT4

Fantech DBLT4

Fantech Secondary Lint Trap for Dryer Boosting Fan Kits

Regular Price: $39.20
-5% Use Coupon Code: 5OFF
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Fantech FIDT6

Fantech FIDT6

Fantech 25' of Insulated Flexible 6" Round Duct

Regular Price: $35.20
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech LD10

Fantech LD10

Fantech 10" Duct Silencer

Regular Price: $172.80
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
+ FREE Shipping
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Fantech RC6

Fantech RC6

Fantech 6" Duct Roof Cap

Regular Price: $70.40
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech LD6

Fantech LD6

Fantech 6" Duct Silencer

Regular Price: $96.99
-5% Use Coupon Code: 5OFF
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Fantech LD8

Fantech LD8

Fantech 8" Duct Silencer

Regular Price: $112.00
-5% Use Coupon Code: 5OFF
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+ FREE Shipping
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Fantech LD4

Fantech LD4

Fantech 4" Duct Silencer

Regular Price: $76.00
-5% Use Coupon Code: 5OFF
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Fantech RC4

Fantech RC4

Fantech 4" Duct Roof Cap

Regular Price: $23.75
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Fantech FY4

Fantech FY4

Fantech Y-Sheet Metal Adaptor for 4" Duct

Regular Price: $18.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F216 4x25 (51323)

Hart & Cooley F216 4x25 (51323)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 4" x 25'

Our Price: $23.40
as low as: $21.06

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Add 18 : $22.23 ea. (5% off)
28 : $21.76 ea. (7% off)
37+ : $21.06 ea. (10% off)
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Hart & Cooley F216 6x25 (51325)

Hart & Cooley F216 6x25 (51325)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 6" x 25'

Regular Price: $39.99
On Sale: $28.10
as low as: $25.29

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Hart & Cooley F214 6x25 (51037)

Hart & Cooley F214 6x25 (51037)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 6" x 25'

Regular Price: $35.99
On Sale: $25.10
as low as: $22.59

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Add 16 : $23.85 ea. (5% off)
26 : $23.34 ea. (7% off)
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Fantech RC10

Fantech RC10

Fantech 10" Galvanized Steel Roof Cap with Damper Flap

Regular Price: $96.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FY6

Fantech FY6

Fantech Y-Sheet Metal Adaptor for 6" Duct

Regular Price: $28.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FC4

Fantech FC4

Fantech 4" Duct Stabilizing Mounting Clamp

Regular Price: $16.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 3x25 (557818)

Hart & Cooley F214 3x25 (557818)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 3" x 25'

Regular Price: $26.99
On Sale: $18.90
as low as: $17.01

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Add 22 : $17.96 ea. (5% off)
34 : $17.58 ea. (7% off)
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Hart & Cooley F218 16x25 (27832)

Hart & Cooley F218 16x25 (27832)

Hart & Cooley R8.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 16" x 25'

Regular Price: $139.99
On Sale: $99.50
as low as: $89.55

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Add 5 : $94.53 ea. (5% off)
7 : $92.54 ea. (7% off)
9+ : $89.55 ea. (10% off)
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Fantech FML8

Fantech FML8

Fantech Fixed Metal Intake/Exhaust Louver for 8" Duct - White

Regular Price: $31.20
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FEA4

Fantech FEA4

Fantech 4" Duct Adjustable Round Metal Elbow

Regular Price: $8.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 4x25 (51035)

Hart & Cooley F214 4x25 (51035)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 4" x 25'

Regular Price: $30.99
On Sale: $21.50
as low as: $19.35

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Add 19 : $20.43 ea. (5% off)
30 : $20.00 ea. (7% off)
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Fantech IG6

Fantech IG6

Fantech 6" Wire Coil Duct Inlet Guard

Regular Price: $6.72
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FC6

Fantech FC6

Fantech 6" Duct Noise Reduction Mounting Clamps

Regular Price: $15.20
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech CKR64

Fantech CKR64

Fantech 4" x 6" Duct Coupler

Regular Price: $19.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FIDT8

Fantech FIDT8

Fantech 25' of Insulated Flexible 8" Round Duct

Regular Price: $46.49
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 12x25 (51042)

Hart & Cooley F214 12x25 (51042)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 12" x 25'

Our Price: $43.00
as low as: $38.70

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Add 10 : $40.85 ea. (5% off)
15 : $39.99 ea. (7% off)
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Hart & Cooley F216 8x25 (51327)

Hart & Cooley F216 8x25 (51327)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 8" x 25'

Our Price: $33.50
as low as: $30.15

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Add 12 : $31.83 ea. (5% off)
19 : $31.16 ea. (7% off)
26+ : $30.15 ea. (10% off)
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Fantech RC8

Fantech RC8

Fantech 8" Galvanized Steel Roof Cap with Damper Flap

Regular Price: $84.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 8x25 (51039)

Hart & Cooley F214 8x25 (51039)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 8" x 25'

Our Price: $29.50
as low as: $26.55

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Add 14 : $28.03 ea. (5% off)
22 : $27.44 ea. (7% off)
30+ : $26.55 ea. (10% off)
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Hart & Cooley F218 14x25 (27831)

Hart & Cooley F218 14x25 (27831)

Hart & Cooley R8.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 14" x 25'

Our Price: $87.00
as low as: $78.30

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Add 5 : $82.65 ea. (5% off)
8 : $80.91 ea. (7% off)
10+ : $78.30 ea. (10% off)
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Fantech FIDT10

Fantech FIDT10

Fantech 25' of Insulated Flexible 10" Round Duct

Regular Price: $52.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley UL-181B-FX (11372)

Hart & Cooley UL-181B-FX (11372)

Hart & Cooley UL181B-FX Flexible Duct Tape - Silver, 2" x 120 YDS

Regular Price: $18.99
On Sale: $13.10
as low as: $11.79

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Add 31 : $12.45 ea. (5% off)
49 : $12.18 ea. (7% off)
66+ : $11.79 ea. (10% off)
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Fantech FC10

Fantech FC10

Fantech 10" Metal Stabilizing/Mounting Clamps with Neoprene (2/Pack)

Regular Price: $20.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F216 10x25 (51329)

Hart & Cooley F216 10x25 (51329)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 10" x 25'

Our Price: $42.40
as low as: $38.16

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Add 10 : $40.28 ea. (5% off)
15 : $39.43 ea. (7% off)
21+ : $38.16 ea. (10% off)
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Hart & Cooley F216 12x25 (51330)

Hart & Cooley F216 12x25 (51330)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 12" x 25'

Regular Price: $71.99
On Sale: $50.80
as low as: $45.72

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Add 8 : $48.26 ea. (5% off)
13 : $47.24 ea. (7% off)
17+ : $45.72 ea. (10% off)
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Hart & Cooley F216 9x25 (51328)

Hart & Cooley F216 9x25 (51328)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 9" x 25'

Our Price: $37.00
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
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Hart & Cooley F216 14x25 (51331)

Hart & Cooley F216 14x25 (51331)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 14" x 25'

Our Price: $60.99
Qualifies for Pallet Pricing!

Purchase Pallet Items & Save!

Order $2000 in Pallet Items and
Save an Extra 5% off your Pallet!

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Fantech FY644

Fantech FY644

Fantech FY Series Sheet Metal Y-Adapter, 6 x 4 x 4

Regular Price: $28.49
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FC8

Fantech FC8

Fantech 8" Duct Noise Reduction Mounting Clamps

Regular Price: $16.80
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F216 7x25 (51326)

Hart & Cooley F216 7x25 (51326)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 7" x 25'

Our Price: $30.70
as low as: $27.63

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Add 14 : $29.17 ea. (5% off)
21 : $28.55 ea. (7% off)
29+ : $27.63 ea. (10% off)
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Fantech FY664

Fantech FY664

Fantech FY Series Sheet Metal Y-Adapter, 6 x 6 x 4

Regular Price: $24.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FML10

Fantech FML10

Fantech Fixed Metal Intake/Exhaust Louver for 10" Duct - White

Regular Price: $40.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 5x25 (51036)

Hart & Cooley F214 5x25 (51036)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 5" x 25'

Regular Price: $28.99
On Sale: $20.60
as low as: $18.54

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Add 20 : $19.57 ea. (5% off)
31 : $19.16 ea. (7% off)
42+ : $18.54 ea. (10% off)
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Hart & Cooley F216 5x25 (51324)

Hart & Cooley F216 5x25 (51324)

Hart & Cooley R6.0 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 5" x 25'

Our Price: $25.40
as low as: $22.86

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Add 16 : $24.13 ea. (5% off)
25 : $23.62 ea. (7% off)
34+ : $22.86 ea. (10% off)
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Hart & Cooley F214 10x25 (51041)

Hart & Cooley F214 10x25 (51041)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 10" x 25'

Regular Price: $50.99
On Sale: $36.20
as low as: $32.58

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Add 12 : $34.39 ea. (5% off)
18 : $33.67 ea. (7% off)
24+ : $32.58 ea. (10% off)
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Fantech FY866

Fantech FY866

Fantech 8" X 6" X 6" Metal "Y" Adaptor

Regular Price: $26.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FY8

Fantech FY8

Fantech 8" X 8" X 8" Metal "Y" Adaptor

Regular Price: $35.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech FEA6

Fantech FEA6

Fantech 6" Duct Adjustable Round Metal Elbow

Regular Price: $31.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Fantech CKR86

Fantech CKR86

Fantech 8" x 6" Sheet Metal Reducer/Increaser

Regular Price: $41.99
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 7x25 (51038)

Hart & Cooley F214 7x25 (51038)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 7" x 25'

Our Price: $25.99
as low as: $23.39

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Add 16 : $24.69 ea. (5% off)
25 : $24.17 ea. (7% off)
34+ : $23.39 ea. (10% off)
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Smart 630501

Smart 630501

Smart 630501 Flow Elbow Flexible Duct Energy Upgrade Kit - 4" - 16"

Regular Price: $19.99
On Sale: $13.60
as low as: $12.24

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Add 30 : $12.92 ea. (5% off)
47 : $12.65 ea. (7% off)
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Fantech IG8

Fantech IG8

Fantech 8" Wire Coil Duct Inlet Guard

Regular Price: $8.00
-5% Use Coupon Code: 5OFF
to get 5% Off this Item!
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Hart & Cooley F214 9x25 (51040)

Hart & Cooley F214 9x25 (51040)

Hart & Cooley R4.2 Metalized Jacket Insulated Flexible Air Duct with 2-Ply Black Polyester Core - 9" x 25'

Our Price: $33.10
as low as: $29.79

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Add 13 : $31.45 ea. (5% off)
20 : $30.78 ea. (7% off)
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Fantech IG4

Fantech IG4

Fantech 4" Wire Coil Duct Inlet Guard

Regular Price: $7.49
-5% Use Coupon Code: 5OFF
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54 products Sort by 

How to Select

How to select Flex Ducting

Installing flex ducting in a house is very necessary for safe and easy connection of all air ways and corners of the building. Moreover, flex ducting reduces the number of unnecessary elbows thus increasing the efficiency of the system. Selecting the necessary ducting parts and accessories is always complicated, especially for people who don’t know what to look for. This guide will help you select the best flex ducting supplies for your home.

An essential part of every ducting system is flexible duct. This is the tube that connects all of the inputs and outputs and provides space for air circulation. To know what type of such ducting you need, you have to size the flex work appropriately. Correct calculations will make the air volume flow through the system properly thus providing every room of your house with fresh air.

Square footage of each room is the first detail to calculate. Next step is figuring out the CFM rating that corresponds to the room’s area. CFM is the amount of air that is required per a square meter of the area. This means that to receive proper ventilation, a 50 square foot room will need 50 CFM of air volume. Now, to calculate the flex ducting size, use the online calculator.

When you have specified the ducting size, you may need to calculate its length if you haven’t done it previously. Simply measure the perimeter of the room or the area where the flex ducting will be installed.

The next step in selecting Flex Ducting is deciding which construction material to use. The most common types of duct materials are: vinyl coated flex, fiberglass or galvanized sheet metal. Fiberglass offers better insulation, galvanized metal is perfect for industrial and commercial installations and flex ducting features easy installation.

Selecting the right ducting fittings is crucially important. You need to ensure that such fittings are compatible with the flex ducting and in addition to that provide gap and slot free connection. If the air is slipping through the connections, more energy and money will be spent to push it through the system. To prevent such thing from happening, install your ducting and all of the additional fittings with efficiency in mind.

Special devices, such as fans, air-conditioners and coolers, provide the air circulation through the duct system of the building. To select perfect devices for your particular system, you need to pay attention to their power, safety, control options, design and quality.