Shop Round to Square Duct Adapter

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$186.00
Mrcool 14" Square To Round Adapter Kit (18.125" Supply & 18.125" Return) | M14HSR4260A
Ingrams Water & Air
$186.00
Mrcool 14" Square To Round Adapter Kit (18.125" Supply & 18.125" Return) | M14HSR4260A
Ingrams Water & Air
$11.87
PATIKIL 4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
80
$11.87
PATIKIL 4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
80
$17.09
ZUDKSUY 8 Inch Duct Connector Flange, 8" Duct Flange 8" Duct Connector, Metal Square To Round Duct Pipe Connector For HVAC Ventilation Cooling
Amazon.com
3
$17.09
ZUDKSUY 8 Inch Duct Connector Flange, 8" Duct Flange 8" Duct Connector, Metal Square To Round Duct Pipe Connector For HVAC Ventilation Cooling
Amazon.com
3
$24.09
Broan S99390098 6" Duct Connector
New Feedonomics Feed - ARC 8/12/2025
$24.09
Broan S99390098 6" Duct Connector
New Feedonomics Feed - ARC 8/12/2025
$17.79
PATIKIL 6 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
64
$17.79
PATIKIL 6 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
64
$138.00
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
eBay
Free shipping
$138.00
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
eBay
Free shipping
$474.95
3.5" Duct X 4" Steel Adapter Round-Condux International
Netceed
$474.95
3.5" Duct X 4" Steel Adapter Round-Condux International
Netceed
$99.00
$113.00
667PCH2 Square To Round Adapter 16" X 14"
HeatAndCool.com
12% off
$99.00
$113.00
667PCH2 Square To Round Adapter 16" X 14"
HeatAndCool.com
$300.90
4" Duct X 4" Steel Adapter Round-Condux International
Netceed
$300.90
4" Duct X 4" Steel Adapter Round-Condux International
Netceed
$139.00
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
$139.00
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
$89.95
80mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$89.95
80mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$295.00
Goodman Square To Round Adapter SQRPGH101/102 For GPG Large Chassis Package Unit
eBay.com
1
Free shipping
$295.00
Goodman Square To Round Adapter SQRPGH101/102 For GPG Large Chassis Package Unit
eBay.com
1
$19.19
$23.99
8 Inch Duct Connector Flange Square To Round Interface Straight Pipe
eBay
Free shipping
20% off
$19.19
$23.99
8 Inch Duct Connector Flange Square To Round Interface Straight Pipe
eBay
Free shipping
$159.14
Mr. Cool M14SR4260 Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$159.14
Mr. Cool M14SR4260 Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$21.75
6 Inch Duct Square To Round Transition Box Duct Adapter Connector Insulated
eBay.com
Free shipping
$21.75
6 Inch Duct Square To Round Transition Box Duct Adapter Connector Insulated
eBay.com
Free shipping
$145.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
Free shipping
$145.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
Free shipping
$1,282.91
8" Duct X 8" Aluminum Flex Guide Adapter Round-Condux International
Netceed
$1,282.91
8" Duct X 8" Aluminum Flex Guide Adapter Round-Condux International
Netceed
$22.59
PATIKIL 10" Duct Connector Flange, Dryer Vent Wall Plate Square To Round Straight With Ducting Clamp For Air Heating Cooling Ventilation Exhaust Fan
Amazon.com
6
$22.59
PATIKIL 10" Duct Connector Flange, Dryer Vent Wall Plate Square To Round Straight With Ducting Clamp For Air Heating Cooling Ventilation Exhaust Fan
Amazon.com
6
$99.95
120mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$99.95
120mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$30.00
Trane P04 Square To Round Metal Furnace Vent Connector Chimney Adapter 2 3/8". Trane American Standard Square To Round. Other HVAC & Refrigeration.
eBay.com
Free shipping
$30.00
Trane P04 Square To Round Metal Furnace Vent Connector Chimney Adapter 2 3/8". Trane American Standard Square To Round. Other HVAC & Refrigeration.
eBay.com
Free shipping
$243.00
MRCOOL Horizontal Application 14" Square-Round Adapter Kit
Home Outlet Direct
$243.00
MRCOOL Horizontal Application 14" Square-Round Adapter Kit
Home Outlet Direct
$10.20
Abs Plastic Air Duct Connector Square To Round Flange Vent Hose Adapter For Efficient
Walmart
$10.20
Abs Plastic Air Duct Connector Square To Round Flange Vent Hose Adapter For Efficient
Walmart
$122.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 /
eBay
Free shipping
$122.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 /
eBay
Free shipping
$218.86
Goodman SQRPGH101/102 Adapter, Square To Round, Horizontal, 16 in X 16.5 in | Skip The Warehouse
Skip The Warehouse
$218.86
Goodman SQRPGH101/102 Adapter, Square To Round, Horizontal, 16 in X 16.5 in | Skip The Warehouse
Skip The Warehouse
$149.00
Square To Round Adapters For Goodman Package Unit Only PCH-3 Sqrpch102/103. Other Heating, Cooling & Air. PCH-3/SQRPCH102/103.
eBay.com
Free shipping
$149.00
Square To Round Adapters For Goodman Package Unit Only PCH-3 Sqrpch102/103. Other Heating, Cooling & Air. PCH-3/SQRPCH102/103.
eBay.com
Free shipping
$31.61
$36.33
10" Duct Connector Flange Metal Pipe Flange Square To Round Interface
eBay
Free shipping
12% off
$31.61
$36.33
10" Duct Connector Flange Metal Pipe Flange Square To Round Interface
eBay
Free shipping
$205.71
MRCOOL 14-In Square To Round Downflow Adapter Kit For Signature Package Unit (MRCOOL M14DSR4260A)
HomElectrical
$205.71
MRCOOL 14-In Square To Round Downflow Adapter Kit For Signature Package Unit (MRCOOL M14DSR4260A)
HomElectrical
$38.91
SOUTHWARK METAL 177S12128 Duct Square-To-Round 12"X12"X8" Transition
eBay.com
Free shipping
$38.91
SOUTHWARK METAL 177S12128 Duct Square-To-Round 12"X12"X8" Transition
eBay.com
Free shipping
$104.11
Mr. Cool M14DSR2436A Downflow Application 14" Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$104.11
Mr. Cool M14DSR2436A Downflow Application 14" Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$169.00
Square To Round Adapters For Goodman Gas Package Units Pch-9 / Sqrpgh1
eBay.com
Free shipping
$169.00
Square To Round Adapters For Goodman Gas Package Units Pch-9 / Sqrpgh1
eBay.com
Free shipping
$125.10
MRCOOL M14SR4260, Square To Round Adapter Kit, 18.125" And 18.125"
PrimeBuy
$125.10
MRCOOL M14SR4260, Square To Round Adapter Kit, 18.125" And 18.125"
PrimeBuy
$305.84
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
Everymarket INC
$305.84
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
Everymarket INC
$145.45
Goodman Sqrpch102-103 Square To Round Adapter 18" To 16" (Sqrpch102-103), Plastic, 1" X 1" X 1"
Walmart
Free shipping
$145.45
Goodman Sqrpch102-103 Square To Round Adapter 18" To 16" (Sqrpch102-103), Plastic, 1" X 1" X 1"
Walmart
Free shipping
$129.36
73C202016 - 20" X 20" To 16" Square To Round Adapter
eBay
1
Free shipping
$129.36
73C202016 - 20" X 20" To 16" Square To Round Adapter
eBay
1
$35.00
Duct Connector Flange, Plastic Square To Round (Grey, 8", 12X12in)
eBay.com
Free shipping
$35.00
Duct Connector Flange, Plastic Square To Round (Grey, 8", 12X12in)
eBay.com
Free shipping
$169.00
Square To Round Adapters For Goodman Gas Package Units PCH-9 / SQRPGH103
eBay.com
Free shipping
$169.00
Square To Round Adapters For Goodman Gas Package Units PCH-9 / SQRPGH103
eBay.com
Free shipping
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Shop Round to Square Duct Adapter

Sponsored
About our ads
$186.00
Mrcool 14" Square To Round Adapter Kit (18.125" Supply & 18.125" Return) | M14HSR4260A
Ingrams Water & Air
$186.00
Mrcool 14" Square To Round Adapter Kit (18.125" Supply & 18.125" Return) | M14HSR4260A
Ingrams Water & Air
$11.87
PATIKIL 4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
80
$11.87
PATIKIL 4 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
80
$17.09
ZUDKSUY 8 Inch Duct Connector Flange, 8" Duct Flange 8" Duct Connector, Metal Square To Round Duct Pipe Connector For HVAC Ventilation Cooling
Amazon.com
3
$17.09
ZUDKSUY 8 Inch Duct Connector Flange, 8" Duct Flange 8" Duct Connector, Metal Square To Round Duct Pipe Connector For HVAC Ventilation Cooling
Amazon.com
3
$24.09
Broan S99390098 6" Duct Connector
New Feedonomics Feed - ARC 8/12/2025
$24.09
Broan S99390098 6" Duct Connector
New Feedonomics Feed - ARC 8/12/2025
$17.79
PATIKIL 6 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
64
$17.79
PATIKIL 6 Inch Duct Connector Flange, Metal Straight Pipe Flange Square To Round Interface Air Duct For Heating Cooling Ventilation HVAC System
Amazon.com
64
$138.00
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
eBay
Free shipping
$138.00
Goodman Square To Round Adapter 16" X 14" Return And Supply Horizontal
eBay
Free shipping
$474.95
3.5" Duct X 4" Steel Adapter Round-Condux International
Netceed
$474.95
3.5" Duct X 4" Steel Adapter Round-Condux International
Netceed
$99.00
$113.00
667PCH2 Square To Round Adapter 16" X 14"
HeatAndCool.com
12% off
$99.00
$113.00
667PCH2 Square To Round Adapter 16" X 14"
HeatAndCool.com
$300.90
4" Duct X 4" Steel Adapter Round-Condux International
Netceed
$300.90
4" Duct X 4" Steel Adapter Round-Condux International
Netceed
$139.00
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
$139.00
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
$89.95
80mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$89.95
80mm To 5 Inch Metric Ducting Adapter
Oneida Air Systems Inc.
$295.00
Goodman Square To Round Adapter SQRPGH101/102 For GPG Large Chassis Package Unit
eBay.com
1
Free shipping
$295.00
Goodman Square To Round Adapter SQRPGH101/102 For GPG Large Chassis Package Unit
eBay.com
1
$19.19
$23.99
8 Inch Duct Connector Flange Square To Round Interface Straight Pipe
eBay
Free shipping
20% off
$19.19
$23.99
8 Inch Duct Connector Flange Square To Round Interface Straight Pipe
eBay
Free shipping
$159.14
Mr. Cool M14SR4260 Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$159.14
Mr. Cool M14SR4260 Square To Round Adapter Kit | Skip The Warehouse
Skip The Warehouse
$21.75
6 Inch Duct Square To Round Transition Box Duct Adapter Connector Insulated
eBay.com
Free shipping
$21.75
6 Inch Duct Square To Round Transition Box Duct Adapter Connector Insulated
eBay.com
Free shipping
$145.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
Free shipping
$145.99
Square To Round Adapters For Goodman Package Unit Only Pch-3 ,
eBay
Free shipping
$1,282.91
8" Duct X 8" Aluminum Flex Guide Adapter Round-Condux International
Netceed
$1,282.91
8" Duct X 8" Aluminum Flex Guide Adapter Round-Condux International
Netceed
$22.59
PATIKIL 10" Duct Connector Flange, Dryer Vent Wall Plate Square To Round Straight With Ducting Clamp For Air Heating Cooling Ventilation Exhaust Fan
Amazon.com
6
$22.59
PATIKIL 10" Duct Connector Flange, Dryer Vent Wall Plate Square To Round Straight With Ducting Clamp For Air Heating Cooling Ventilation Exhaust Fan
Amazon.com
6