Register Box/Stepped Collar Combo accepts metal diffusers.

Press Release Summary:

Made of one-piece, corrosion-proof molded polymer, MH TuffBox is airtight and condensation-resistant, offering alternative to seamed metal register boxes for air distribution applications. Beaded rim on quick break-away collars helps hold flexible duct in place and speed fastening process. Models include MHS with 6 x 6 in. register box and 4, 5, and 6 in. dia collars; MH with 8 x 8 in. box and 6, 7, and 8 in. collars; and MHL with 10 x 10 in. box and 8, 9, and 10 in. collars.

Original Press Release:

Airtec Molded Polymer MH TuffBox Offers Efficiency Gains Vs. Metal Counterparts

One-piece, made-in-the-U.S.A. combination register box/stepped collar combination doesn't leak; and accepts metal diffusers.

Airtec Products Corp., Fall River, Mass., a leading manufacturer and importer of HVAC/R products, offers the MH TuffBox, a one-piece molded polymer register box/stepped collar combination designed specifically for conventional metal diffusers.
Made in the USA of durable, corrosion-proof polymer at Airtec Products' new multi-million-dollar, fully-automated plant addition, the MH TuffBox is an airtight, energy-efficient and competitively-priced alternative to seamed metal register boxes for new construction air distribution applications.

Each MH TuffBox model has a stepped collar design offering a choice of three round duct diameter sizes, which allows 66-percent fewer inventory SKU's for distributors and contractors. A beaded rim on the quick break-away collars helps hold flexible duct in place and speed the fastening process. The MH TuffBox line ranges from the 1) MHS-6 x 6-inch register box and 4,5,6-inch diameter collars; 2) MH-8 x 8-inch register box and 6,7,8-inch diameter collars; 3) MHL 10 x 10-inch register box and 8,9,10-inch diameter collars.

All MH TuffBoxes also include 5/8-inch standoffs to accommodate the correct depth for furring strip drywall applications.

Other features include:

o The only high-quality engineered polymer material in the industry.

o Airtec Products' special polymer is corrosion-proof and has a better insulating R-Value than metal.

o The MH TuffBox is airtight and condensation-resistant, which is energy efficient, reduces potential for mold and improves general IAQ.

o Reduced shipping costs when combined with larger orders that include other products from the expansive Airtec diffuser range or any of the other diversified product lines from the Airtec Products Corp.

For more information on Airtec Products please call 1-800-3AIRTEC, (1-800-324-7832) email, or visit

About Airtec: Airtec manufacturers air diffusion, condensate management and lineset ducting products; and imports mini-split accessories, equipment support systems and other HVAC products. For more information please email call 508-675-2669 or visit

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