TNT Manufacturing operates from an 8,000 square foot facility in western Baltimore, Maryland.  We manufacture low, medium and high pressure round duct systems in a variety of materials: Galvanized, Galvanealled, Stainless, Aluminum, PVC Coated Galvanized, and Perforated for Dual Wall applications. 

By stocking over 1,000 lengths of spiral and more than 1,000 fittings, we can meet your job site requirements in a timely fashion, so as not to impede job site progress.  Our goal is to provide a quality product in a timely fashion.

Our manufacturing equipment is state of the art to facilitate in the production of our products.  Our tubeformer has the capability of manufacturing from 3" to 84" diameter spiral.  Gauges are from 16 gauge to 28 gauge.  We also have the ability of manufacturing our spiral with corrugations to rigidify our spiral, without increasing the weight or the gauge.  Seams on our fittings are completed with a stitchwelder to provide an airtite non-obtrusive look.  Our Gore-Lock machine provides a standing seam jooint between sections of fittings and elbows that provides rigidity and an aesthetic appearance.