TNT now has posters depicting our products.  Click here to download or view.

Be sure to update your address book with our new location.

6315 Erdman Ave.
Baltimore, Md. 21205


TNT Manufacturing is a full service spiral duct manufacturer, supplying all of the round duct needs of HVAC and Mechanical contractors.  Stocking a full complement of pipe and fittings allows us to provide timely deliveries to meet your project needs.  We offer a complete package from take-off of the blueprints during the bid process to delivery to your job site.                         

Our fabrication capabilities include, however are not limited to, the following:

  • Single Wall Round Spiral Duct and Fittings
  • Single Wall Oval Spiral Duct and Fittings
  • Dual Wall Round spiral Duct and Fittings
  • Dual Wall Oval Spiral Duct and Fittings
  • Rectangular Duct and Fittings
  • Welded Exhaust Systems
  • Kitchen Hood Exhaust Systems
  • Custom Metal Fabrication

Materials in which we fabricate products include:

  • Galvanized G-90
  • Galvanealled (Paint Grip)
  • PVC Coated Galvanized (4 x 1 and 4 x 4)
  • Stainless Steel (Type 304 and 316)
  • Aluminum
  • Carbon Steel

                                FULL TAKE OFF SERVICE AVAILABLE