Rectangular to Round Transitions
Rectangular to Round Transitions Standard & Offset
Rectangular to Round Transitions (Offset)

When ordering with flange and offset round, list dimensions in order of
A¹, A², A³, A⁴, B, X, B¹, B².
When ordering without flange, list dimensions in order of A¹, A³, B, X, B¹, B², T¹.
For Offset Square to Round a print is required.
Raw (plain end)
Formed Flange Out
Angle Iron Flange
High Pressure Rectangular Round Transitions
At Spiral Manufacturing Co., Inc., we offer premium high pressure rectangular round transitions, essential for efficient HVAC systems. Our rectangular to round duct transition products ensure seamless airflow and optimal system performance, meeting the highest standards in the industry.
Versatile and High-Quality Transitions
Our rectangular to round duct transitions come in various configurations to meet diverse needs. Whether you require a standard transition with a formed flange out or an offset design, our products deliver reliable performance. These transitions are available in raw (plain end) finishes, as well as formed flange out and angle iron flange options, ensuring a secure and precise fit in your ductwork system.
Enhanced Efficiency and Performance
The design of our rectangular to round duct transition products ensures minimal airflow resistance, promoting better system efficiency. The smooth transition from rectangular to circular duct shapes allows for improved air distribution and reduced energy consumption. Our rectangle to circle duct transitions are built with precision to maintain structural integrity and long-lasting durability, making them a reliable choice for any HVAC application.
Customizable Solutions
At Spiral Manufacturing, we understand that each project has unique requirements. Our high-pressure rectangular duct transition product can be customized to fit specific dimensions and configurations, ensuring a perfect match for your system. Whether you need a rectangular duct flange or a specialized transition design, we provide tailored solutions to meet your needs, enhancing the overall performance of your HVAC system.
Choosing the right rectangular to round or rectangular to circle duct transition is crucial for maintaining efficient airflow in your HVAC system. Spiral Manufacturing Co., Inc. offers high-quality, customizable duct solutions to meet your specific requirements.
Contact Us for High Pressure Rectangular Round Transitions
To learn more about our high pressure rectangular to round duct transitions, call us today at 763.755.7677 or reach us through our contact form.




