All Products
- 1/2″ Round Damper Quadrants
- 1/2″ Round Damper Quadrants with 2 inch standoffs
- 45 Degree Adjustable Angles
- 45 Degree Adjustable PVC Angles
- 45 Degree Full Saddle
- 45 Degree Full Saddle
- 45 Degree Lateral Cross
- 45 Degree Lateral Cross with E-Z Flange
- 45 Degree Lateral Cross with Reducer
- 45 Degree Register Saddle
- 45 Degree Standing PVC Angles
- 45 Degree Standing Seam Angles
- 45 Degree Swedged Saddle
- 45 Degree Swedged Saddle
- 45 Degree Two-Piece Pressed Solid Welded Angles
- 45 Degree Welded Gored Angles
- 45° Degree Adjustable Angles with E-Z Flange
- 45° Degree Lateral Cross with E-Z Flange
- 45° Degree Lateral Tee with E-Z Flange
- 45° Degree Swedge Saddle with E-Z Flange
- 45° Full Saddle with E-Z Flange
- 45° Standing Seam Elbows and Angles with E-Z Flange
- 45° Two Piece Pressed Solid Welded Elbows with E-Z Flange
- 45° Welded Gored Elbows and Angle with E-Z Flange
- 90 Degree Adjustable Elbows
- 90 Degree Adjustable Elbows with E-Z Flange
- 90 Degree Adjustable PVC Elbows and Angles
- 90 Degree Conical Cross
- 90 Degree Conical Cross with E-Z Flange
- 90 Degree Conical Cross with Reducer
- 90 Degree Conical Swedge Saddle
- 90 Degree Conical Tee Duct Fittings
- 90 Degree Conical Tee with E-Z Flange
- 90 Degree Conical Tee with Reducer
- 90 Degree Cross
- 90 Degree Cross with E-Z Flange
- 90 Degree Cross with Reducer
- 90 Degree Duct Tee
- 90 Degree Full Saddle
- 90 Degree Full Saddle with EZ-Flange
- 90 Degree Increased Tap
- 90 Degree Increased Tap
- 90 Degree Pressed Saddle Tap
- 90 Degree Pressed Saddle Tap with Damper
- 90 Degree Pressed Saddles No Damper with E-Z Flange
- 90 Degree Pressed Saddles with 2-Inch Stand Off with E-Z Flange
- 90 Degree Pressed Saddles with Volume Damper with E-Z Flange
- 90 Degree Register Saddle
- 90 Degree Shoe Tap Saddle
- 90 Degree Shoe Tap Saddle with E-Z Flange
- 90 Degree Square Throat Radius Heel Elbow
- 90 Degree Standing Seam Elbows
- 90 Degree Standing Seam Elbows
- 90 Degree Standing Seam Elbows with E-Z Flange
- 90 Degree Straight Tap
- 90 Degree Swedge Saddle with E-Z Flange
- 90 Degree Swedged Saddle
- 90 Degree Swedged Saddle
- 90 Degree Tee No Damper with E-Z Flange
- 90 Degree Tee Polyvinyl Coated
- 90 Degree Tee with E-Z Flange
- 90 Degree Tee with Reducer
- 90 Degree Tee with Volume Damper
- 90 Degree Two Piece Pressed Solid Welded Elbows
- 90 Degree Two Piece Pressed Solid Welded Elbows with E-Z Flange
- 90 Degree Welded Gored Elbows
- 90 Degree Welded Gored Elbows and Angles with E-Z Flange
- 90° Degree Conical Swedge Saddle with E-Z Flange
- 90° Pressed Saddles with 1-1/2-inch Stand Off with E-Z Flange
- Access Doors
- Access Doors – Rectangular Ductwork
- Access Doors – Round Spiral Ductwork
- Access Doors (Rectangular)
- Access Doors (Round)
- Actuator Mount
- ATCO – R4.2 Insulated Flexible Duct
- AUTO-DRAFT
- Back Draft Damper (BDD)
- Belimo Electric Actuators
- Bullhead Tee
- Bullhead Tee Duct Fitting
- Bullnose Tee (Bullhead)
- Butyl Tape
- Cable Hanging Systems
- Canvas Duct Connector
- Chip Brush 2-Inch
- Close Cell Neoprene
- Companion Angle Rings – Pressed and Rolled for Spiral Pipe and Fittings
- Companion Rings
- Complete Seal Damper Sleeve
- Complete Seal Damper Sleeve with 2-inch Standoff
- Complete Seal Fittings
- Concentric Duct Transition
- Concentric Reducer
- Concentric Reducer
- Concentric Reducer Polyvinyl Coated
- Concentric Reducer with E-Z Flange
- Condu Locks
- Condu-Clamp
- Condu-Lock
- Conical Cross
- Conical E-Z Tap with 2-inch Standoff Collar
- Conical E-Z Tap with 2-inch Standoff with E-Z Flange
- Connector (Coupling)
- Connector (Coupling)
- Cross
- Cross Polyvinyl Coated
- Cross with Reducer Polyvinyl Coated
- CSR – Curb Support Rail
- Damper with Connecting Rods
- Diffusers
- Double Deflection Spiral Duct Diffuser
- Double Rod Hanger
- Double Rod Hanger
- Double Wall 45 Degree Angle with E-Z Flange and Barrel Clamp
- Double Wall 45 Degree Lateral with E-Z Flange and Barrel Clamp
- Double Wall 90 Degree Elbow with E-Z Flange and Barrel Clamp
- Double Wall 90 Degree Tee with E-Z Flange and Barrel Clamp
- Double Wall E-Z Flange Jr. with Barrel Clamp — 6-inch to 24-inch
- Double Wall Pipe Connector
- Double Wall Pipe with E-Z Flange and Barrel Clamp
- Doublewall Concentric Transition
- Doublewall Y-Branch
- DP 2590 Solvent Based Spray Adhesive
- DP 77 Industrial Spray Adhesive
- DP1010 Water Based Duct Sealant – Gray
- DP2501 Water Based Duct Liner Adhesive – Clear
- Duct Cap & Duct Wrap
- Duct Pants Fittings
- Ductcap – 14in – 38in
- Ductcap – 6in – 14in
- Ductwork Tools
- E-Z Flange Jr. with Barrel Clamp – 6-inch to 24-inch Diameter
- E-Z Flange Jr. with Barrel Clamp – 6 to 24-inch Diameter
- E-Z Flange Jr. with Barrel Clamp Field Cut Set
- E-Z Flange Spiral Pipe System
- E-Z Flange Spiral Pipe System Specs
- E-Z Flange with Barrel Clamp
- E-Z Flange with Barrel Clamp – 26 to 96-Inch Diameter
- E-Z Flange with Barrel Clamp | Large 26-96-inch Diameter
- E-Z Tap Collar Polyvinyl Coated
- E-Z Tap Collar with 2-inch Standoff
- E-Z Tap Collar with Damper
- E-Z Tap Collar with Damper Polyvinyl Coated
- E-Z Tap Collar with E-Z Flange
- E-Z Tap Collars
- E-Z Tap Collars with 2-inch Standoff
- E-Z Tap Collars with 2-inch Standoff with E-Z Flange
- E-Z Tap Collars with Volume Damper with E-Z Flange
- E-Z Tap Conical Takeoff Collar
- E-Z Tap Conical Takeoff Collar Polyvinyl Coated
- E-Z Tap Conical Takeoff Collar with Damper
- E-Z Tap Conical Takeoff Collar with Damper Polyvinyl Coated
- E-Z Tap Conical Takeoff Collar with E-Z Flange
- Eccentric Reducer
- Eccentric Reducer Polyvinyl Coated
- Eccentric Reducer with E-Z Flange
- Egg Crate
- Elevator Exhaust Dampers
- End Bearing Line – 1/2in Open End
- End Bearing Line – 3/8in Acorn Nut Handle
- End Bearing Line – 3/8in Closed End
- End Bearing Line – 3/8in Open End
- End Cap (Plug)
- End Cap (Plug)
- Engineering End Bearing Line – 1/2in Closed End
- Equal Y Branch
- EZ Rail and Acoustic Turning Vane
- EZ Rail and Hollow Turning Vane – 4in
- EZ Rail II Snap Lock and Single-Wall Turning Vanes
- Fitting Coupling
- Fitting End Cap
- Fixed Pattern Diffusers – 2 Cone
- Fixed Pattern Diffusers – 2 Cone Series
- Fixed Pattern Diffusers – 3 Cone
- Fixed Pattern Diffusers – 3 Cone Series
- Flanges
- Flat Bull Head Nose Tee
- Flat Oval 45 Degree Angle
- Flat Oval 60 Degree Angle – 4 pieces
- Flat Oval 90 Degree Elbow
- Flat Oval 90 Degree Mitered Elbow
- Flat Oval Conical Lateral
- Flat Oval Eccentric Reducer
- Flat Oval Lateral Tee
- Flat Oval Reducing Tee
- Flat Oval Saddle Tap
- Flat Oval Standard Spiral Pipe Connector
- Flex Connector with E-Z Flange
- Flexible Duct Connector – 3 x 3 x 3 – equal to MBX
- Flexible Duct Connector – 4 x 4 x 4 – TDC
- Flexible Duct Connector – Aluminum – 3 x 3 x 3
- Flexible Duct Connector – Jr. Canvas – 2 x 3 x 2
- Flexible Duct Connector – Stainless – 3 x 3 x 3
- Floor sweeps
- Full Blast Gate
- Full Blast Gates
- Galvanized R-Angle
- Gaskets
- Grille Box Tap
- Hammer-On Regulator Sets
- Handles, Extensions, Standoffs & Regulators
- Heavy Duty Flexible Duct Ties
- Heavy Duty Flexible Duct Ties
- Heavy Duty Volume Dampers
- Heavy Volume Dampers
- Hi-Efficiency Die Stamped Take Off (Super HETOs) with Volume Damper with E-Z Flange
- Hi-Efficiency Take off (Super Heto) with 2-inch Standoff with E-Z Flange
- High Efficiency Steel Takeoffs
- High Efficiency Take Off (Super Heto) with 2-inch Extension and EZ Flange
- High Efficiency Take Off (Super Heto) with EZ Flange
- High Efficiency with 2-inch Standoff
- HVAC Slip and Drive Connection
- Insulated Roof Curb (RC)
- KV12 Bracket Assembly
- Large Double Wall E-Z Flange with Barrel Clamp — 26-inch to 96-inch Diameter
- Lateral Cross
- Lateral Saddle Tap
- Light Gauge Dampers
- Light Gauge Round Pipe Hangers
- Light Gauge Round Pipe Hangers
- Mechanical System Hanger – Clutcher
- MVBD – Med-Velocity Back Draft Damper
- Notch Lock
- Notched Collars
- Notched Collars
- Notched Collars with Damper
- Nylon Ties
- Offset
- Offset
- Offset Duct Pants
- Offset Fitting
- Offset with E-Z Flange
- Opposed Blade Non-Sealed Balancing Damper (OBN)
- Opposed Blade Sealed Damper (OBS)
- Oval to Rectangular
- Oval to Round
- Pair of Pants (Wye Branch)
- Pair of Pants (Wye Branch) with E-Z Flange
- Parallel Blade Non-Sealed Balancing Damper (PBN)
- PBS – Parallel Blade Sealed Damper
- Pipe Coupling
- Pipe End Cap
- Polyken 229 Duct Tape – Silver
- Polyken 330 Duct Tape – Aluminum
- Polyken 339 Printed Duct Tape – Aluminum
- Polyken 557 Printed Duct Tape – Silver
- Polyken 827 Duct Tape – White
- Pressed Concentric Reducer
- Pressed Concentric Reducer E-Z Flange
- Pressed End Caps with E-Z Flange
- Proving Switch Mount
- PVC 90 Degree Full Saddle
- PVC Register Boot
- R4.2 Insulated Flexible Duct
- Radius Angle
- Radius Duct Variable Angle
- Radius Elbow
- Radius Offset Fitting
- Radius with Square Throat
- RBD – Round Back Draft Damper
- Rectangular Duct Wrap
- Rectangular Duct Wrap
- Reducing Bullhead Tee
- Reducing Conical Lateral
- Reducing Conical Tee
- Reducing Cross
- Reducing Lateral
- Reducing Offset
- Reducing Offset
- Reducing Offset – Left or Right
- Reducing Radius Elbow – Left or Right
- Reducing Y Branch
- Register Takeoffs
- Regulators and Sets – 1/2in Quadrant
- Regulators and Sets – 3/8in Dial
- Regulators and Sets – 3/8in Quadrant
- Round Ceiling Diffuser with Butterfly Damper
- Round Dampers (Light Gauge)
- Round Ductcap
- Round Opposed Blade Non-Sealed Balancing Damper (ROBN)
- Round Opposed Blade Sealed (ROBS) Damper
- RSBN – Round Single Blade Non-Sealed
- RSBS – Round Single Blade Sealed Damper
- Save on Labor with SMC Turning Vane and E-Z Rail
- Save Time & Money with E-Z Flange
- Sealant and Adhesives
- Sheet Metal Screws (TEK Screws)
- Single Blade Balancing Damper (SBD)
- Single Deflection Spiral Duct Diffuser
- Single Rod Hangers
- Single Rod Hangers for Spiral Ductwork
- Skyblasts
- SLB – Standard Louver Box
- Sleeve with 2” Standoff
- Special Fabrics Flexible Duct Connector
- Spiral Duct Register Takeoffs
- Spiral Pipe & Fittings
- Spiral Pipe Connector (Non-Gasketed)
- Square Throat Angle
- Square Throat Elbow
- Square to Round Duct Transition
- Standard Louver Flange (SLF)
- Standard Spiral Pipe Connector
- Standoffs – Elevated Damper Regulator
- Straight 90 Degree Tap
- Straight Tee
- Struts, Couplings, Nuts and Washers
- Super HETO High Efficiency Duct Takeoff
- Super HETO High-Efficiency Die Stamped Takeoff
- Super Heto with 2-inch Extension with E-Z Flange
- Super Heto with 2″ Standoff
- TDC Accessories
- TDC and TDF Connections
- Tee with Reducer Polyvinyl Coated
- Tek & Zip Screws
- TEK Sheet Metal Screws – 10 x 1/2in
- TEK Sheet Metal Screws – 10 x 1in
- TEK Sheet Metal Screws – 10 x 3/4in
- Tensioning Tool
- Tensioning Tool
- Tie Rod Reinforcement
- Top or Bottom Side Flat Transition Duct
- Transition – Top and Left Sides Flat
- Transition – Top and Left Sides Flat
- Transition – Top and Right Sides Flat
- Transition – Top and Right Sides Flat
- Wire Mesh (Bird Screen)
- Wire Rope 7×7
- Wire Rope Hangers CL18
- Wire Rope Hangers CL23
- Y-Branch Pipe Fitting
- Zip Sheet Metal Screws – 10 x 1/2in
- Zip Sheet Metal Screws – 10 x 1in
Thermaduct by Sheet Metal Connectors, Inc.
Exterior Pre-Insulated Weatherproof Ductwork
Sheet Metal Connectors is a licensed manufacturer for Thermaduct,™ pre-insulated ductwork that’s designed for use in exterior weatherproofing and rooftop applications. Thermaduct provides insulation, duct and cladding all in one high-efficiency duct system.
Exterior Ductwork Insulation That’s Different
With Thermaduct, avoid the standard cladding issues, corrosion and leakage that leads to eventual exterior duct failures. Thermaduct can be installed using a gasketed 4-bolt connection with weather-resistant covering at all transverse joints.
Advantages of Thermaduct Insulation
Thermaduct is fabricated following the SMACNA Phenolic Duct Construction Standard. Its vinyl cladding supplies a strong, seamless surface which eliminates water intrusion areas to provide a tough and weatherproof exterior. Up to three corners of its 1,000 micron cladding can be bent thermally, leaving no seams with the final corner solvent-welded for water-tight protection.
Thermaduct exterior duct phenolic exceeds existing ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) and ICC (International Code Council) Energy Codes.
Thermaduct panels are available in the following insulation types:
- R-8.1 (1x 1 3/16″)
- R-12 (1 x 1 3/4″)
- R-16.2 (2 x 1 3/16″)
- R-20 (1 x 1 3/4″ & 1 x 1 3/16″)
- R-24 (2 x 1 ¾”)
Benefits of Thermaduct insulation include:
- Passes the UL181 mold growth test
- Closed cell insulation
- Proven low air leakage
- UV stable, 1,000 micron vinyl cladding
- Made in the USA
- Made in our union shop
Compliance Testing
Thermaduct is designed for exterior duct applications to help withstand tough conditions. Thermaduct incorporates the following standards for testing and compliance, making it a true solution for weatherproofing and exterior ductwork:
ASTM D-638, ASTM D790, ASTM D-256, ASTM D-4226, ASTM D-4216, ASTM D-792, ASTM D-2240, ASTM D-696, ASTM D-648, UL-94 Exterior Cladding
Thermaduct Insulation Color Choices
Available in three colors — white (standard), tan, and gray vinyl — Thermaduct is tested for UV stability, durability, low thermal transfer, and heat deflection and buildup. Its 1,000 micron cladding is up to 5 times thicker than exterior duct protection offered by other manufacturers.
All SMC custom sheet metal products, including Thermaduct insulation, are designed and manufactured in our yellow label union shop. View the Contractor Installation Manual, get access to product training courses or explore submittal information.