FAMCO SDB square to round HVAC transition Box, galvanized steel

FAMCO Square to Round Transition Box Measurement Guide

Square to Round Transition Box

Rated 4.98 out of 5 based on 62 customer ratings

(62 customer reviews)

$24.95 – $79.95

Quality constructed from heavy-duty 28 gauge galvanized steel
Primarily for use to attach a ceiling register to your air supply
Can be used in many applications that transition a square duct to round duct
Available in a variety of common sizes, see the drop down menu for all sizes available

Size

4 inch
5 inch
6 inch
7 inch
8 inch
9 Inch
10 inch
12 Inch
13 Inch
14 Inch
16 Inch
18 Inch
20 Inch

Dimensions

22x22 inch
10 x 8 inch
20 x 20 inch
6x6 inch
8x8 inch
8x16 inch
10x10 inch
12x8 inch
12x10 inch
12x12 inch
14x8 inch
14x10 inch
14x14 inch
15x15 inch
16x16 inch
18x18 inch
24x24 inch

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SKU SDB Categories Accessories, Diffusers

Description

The FAMCO SDB square to round HVAC transition Box – diffuser is designed primarily for use to attach a ceiling register to your air supply, but can be used in many applications that transition a square duct to round duct. Quality constructed from heavy-duty 28 gauge galvanized steel. Available in a variety of common sizes, see the drop down menu for all sizes available. The FAMCO SDB square to round HVAC transition box i s 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, please refer to the FAQs above or feel free to contact us.

PDF Download

Spec Sheet

Square to Round Transition Box

SKU: SDB

Click to Enlarge

Questions and answers of the customers

Does the size pertain to the round duct size?

Q Does the size pertain to the round duct size? answer now
Asked on April 19, 2022 12:26 pm

A
Yes, the "size" selection refers to the round hole size. The "dimensions" selection would be for the square part of the box.

A Yes

A Yes

I have a 18" Round Plenum, need to adapt to Rectangular plenum. is this made to order ?

Q I have a 18" Round Plenum, need to adapt to Rectangular plenum. is this made to order ? answer now
Asked on August 23, 2021 3:21 pm

A
These products are currently manufactured in our Meridian, Idaho factory - the sizes we are able to manufacture are those shown in the dropdown menu.

Can these be used for a bathroom exhaust fan intake opening where moist air will travel through the vent?

Q Can these be used for a bathroom exhaust fan intake opening where moist air will travel through t...... Read more answer now
Asked on August 16, 2021 7:55 am

A
We would recommend asking your exhaust fan manufacture for their recommended install method.

I'm looking for something like this but without the "box". I need need to connect round flexible duct to a rectangular hole on the main trunk, but with the "box" there's no mating surface (I need flat sides to secure with sheet metal screws). I suppose I could break the welds and hammer the sides flat but do you have a product like I'm describing? I can find them in plastic but would prefer galvanized aluminum. Thanks.

Q I'm looking for something like this but without the "box". I need need to connect round flexible ...... Read more answer now
Asked on August 12, 2021 7:52 am

A
This is not something that we currently supply or manufacture.

A The magic phrase is Start Collar. You need a start collar, either buy it (somewhere), or watch a YouTube video.

I need a 13"×14"×6"round

Q I need a 13"×14"×6"round answer now
Asked on July 29, 2021 7:24 pm

A
This is not a size we are currently able to manufacture, unfortunately.

I need a 24" x 24" and 14" diameter transition box. Do you have this size? Thanks

Q I need a 24" x 24" and 14" diameter transition box. Do you have this size? Thanks answer now
Asked on June 16, 2021 11:48 am

A
Yes - this is a size we are currently able to manufacture, you can select these dimensions in the dropdown.

If I order today ..which one is the delivery date? thanks

Q If I order today ..which one is the delivery date? thanks answer now
Asked on June 12, 2021 12:58 pm

A
Current manufacturing and shipping estimates are given in the shopping cart and at checkout.

I need a 10"w x 3-1/4 to a "6 inch-round

Q I need a 10"w x 3-1/4 to a "6 inch-round answer now
Asked on May 18, 2021 5:49 pm

A
This is not a size we currently manufacture, unfortunately.

Do you make w 16”. L18” round 14. Duct adapter

Q Do you make w 16”. L18” round 14. Duct adapter answer now
Asked on May 2, 2021 12:06 pm

A
We currently only manufacture the sizes shown in the dropdown menu

Do you make these in 18Wx18Lx12D

Q Do you make these in 18Wx18Lx12D answer now
Asked on April 25, 2021 1:05 pm

A
Yes - all sizes available can be selected in the dropdown on the product page.

Could we order this for a custom size box of 16 x 25 in square and 8-inch diameter circle? Thank you.

Q Could we order this for a custom size box of 16 x 25 in square and 8-inch diameter circle? Thank ...... Read more answer now
Asked on October 25, 2020 11:17 pm

A
We currently only offer customization on volume runs with a total value greater than $5,000

62 reviews for Square to Round Transition Box

5.0

Based on 62 reviews

5 star	98	98%
4 star	1	1%
3 star		0%
2 star		0%
1 star		0%

Showing 1 of 62 reviews (4 star). See all 62 reviews

Rated 4 out of 5

Mark Nuhfer (verified owner) – August 18, 2019

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.