Square to Round Transition Box

(37 customer reviews)


Category: HVAC Accessories – Subcategory: Diffuser Material: Galvanized Steel – Finish: Mill – Thickness: 28 Gauge Shape: Round Diameter: 6″, 7″, 8″, 9″, 10″, 11″, 12″, 13″, 14″, 15″, 16″, 18″ Box Dimensions: 6×6″, 8×8”, 10×10”, 12×12”, 14×14”, 16×16”, 18×18″ Square – Sku: SDB

SKU: SDB Categories: ,

The FAMCO SDB Square to Round HVAC Transition Box – Diffusers. Quality constructed in 28 gauge Galvanized steel. Note: Round side must be equal or smaller in size to the square side of the transition box. The FAMCO SDB Square to Round HVAC Transition Box is manufactured by FAMCO in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product and variations available, please refer to the FAQs above or feel free to contact us by phone or email.

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Square to Round Transition Box


37 reviews for Square to Round Transition Box

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  1. Chris

    Good quality

    Pretty basic square to round transition, but very well made. Ordering was easy and it got here pretty quick. The only problem was on my end, I ordered the wrong size. I needed a 12″ instead of the 14″. Oh well, I can always let my boss have them and consider it another example of the woodworkers maxim: “Measure twice. Cut once.”

  2. Christopher T. (verified owner)

    I had a question about dimension, they responded within an hour and order was made, item arrived a week later just as I had hoped. Great experience.

  3. R ALLEN (verified owner)

    The part looks nice and it was built and shipped quickly!

  4. Anonymous (verified owner)

  5. Shannon (verified owner)

    This arrived in perfect condition and fit exactly how I needed.

  6. Andrew (verified owner)

    Thanks for making these available and easy to order. Great quality. Good shipping process.

  7. Hugh Siebenthall (verified owner)

    My order was small and of little consequence to your overall operation. You followed through precisely as stated. Thank you and your entire team.

  8. Tim Thompson (verified owner)

  9. Mark Nuhfer (verified owner)

    Exactly what I ordered
    Just a little expensive with the shipping being about the same price as the product.
    But I knew I needed it.
    The quality is there long after the price is gone.

  10. Anonymous (verified owner)

  11. john d. (verified owner)

    Quick and easy to order. Arrived in perfect condition. Good price.

  12. John B. (verified owner)

  13. tony ozark (verified owner)


  14. Roy Oldaker (verified owner)

  15. Dan (verified owner)

  16. Jose Gonzales (verified owner)

    Thank you! It was both put together and priced very well!

  17. Richard Plenert (verified owner)

  18. John Garbarino (verified owner)

    Great company ford hard to find stuff fast shipping

  19. Anonymous (verified owner)

  20. mark t. (verified owner)

    The transition box I ordered fit perfectly around my water to air heat exchanger. And very good build quality.

  21. Nick D. (verified owner)

  22. Josefa Barreiro (verified owner)

  23. Anonymous (verified owner)

  24. Josef (verified owner)

    Quality product, no problem with any phase of this order. Thanks!!!!!

  25. Kendall Marks (verified owner)

    Excellent value, fast delivery

  26. Joseph Firrantello (verified owner)

    Product was perfect for my needs. Received quickly.

  27. Anonymous (verified owner)

  28. Matthew T. (verified owner)

    Perfect!!!! Very happy!!! Will buy here again!!

  29. Hector cruz (verified owner)


  30. Andrew (verified owner)

    Great craftsmanship

  31. James G. (verified owner)

    Awesome! This has been a life saver. I bought this to help redirect heat from the furnace in my RV. It used to blow straight onto the thermostat so it never got warm inside and the furnace kept kicking on and off. Now i’ve successfully redirected all the heat and it works like it should. Haven’t burned the place down yet either!

  32. Jessica (verified owner)

  33. Glenn Fulmer (verified owner)

    Great fit and great construction.

  34. Mike M. (verified owner)

    Beautiful product, arrived quickly!

  35. Ralph P. (verified owner)

    The product was excellent quality and fit perfectly

  36. Ralph (verified owner)

    Well made u band exactly what I wanted.

  37. Bud C. (verified owner)

    As advertised, shipped promptly, very high quality product. Shipping cost was high but would buy from Famco again.

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