(800)865-5931 Mon-Tues 8am-7pm, Wed-Thurs 8am-6pm CT (closed Fri July 3rd)
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The Alpine SBD30-100-244 has been discontinued.
TRY THIS INSTEAD
Please call us for a suitable alternate product.

(800) 865-5931

Mon-Tues 8am-7pm, Wed-Thurs 8am-6pm CT (closed Fri July 3rd)

This return air support box and plenum kit is for use with systems where the return air must come in underneath the furnace or air handler. The kit includes 8 feet of 24 inch by 8 inch sheet metal ductwork that can be custom trimmed to the correct height for most applications, and a support box that can hold a furnace or air handler up to 22 inches wide. The support box features an interior support bracket for maximum strength, and a 20 by 25 inch filter slot that can accommodate a one, four, or five inch thick media filter. This kit does not include a filter. Please  click here to see our recommended filter. For return air box only, please see the Snappy SBD30 .

Filter Size
20 x 25 Inches
Support Box Dimensions
30W x 28D x 10H inches
Duct Size
8 x 24 inches
Use Media Filters of Thickness
1 / 4 / 5 inches
Duct Length
8 ft
Max Furnace or Air Handler Width
22 inches
Height
10 Inches

In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.