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2 Raw Material Manufactured from 4 8-foot sheets Fiber-reinforced 1-mil aluminumfaced polyisocyanurate panels embossed aluminum Other patterns and stainless steel are available Necessary supplies are included with every job 2 of 17

3 Shop Fabrication Fabricating in the workshop promotes safety and better QC than trying to make the parts in the field. Panels are dry fit before final assembly to ensure correct alignment and fit. 3 of 17

4 Shapes of the Pieces Top Sides Bottom Assembled The pieces fit together in shiplap joints. The joints don t leak, come apart, or weaken the system. 4 of 17

5 Fitting to the Ductwork To ensure accuracy, detailed measurements are taken directly from the existing ductwork. Techna-Duc Ductwork Techna-Duc is fabricated to be ½ inch larger all around than the ductwork it protects, adding a significant improvement to system efficiency Typical ½" Air Space 5 of 17

6 Sealed Interlocks Aluminum cladding protects the insulation, assures a strong, tight fit for the panels, and prevents water infiltration Bottom and side protection 6 of 17

7 TDC Joints In the field, installers measure the location of the joint, cut out the notch in the Techna-Duc, then seal the exposed surfaces, creating a weather-tight groove that completely covers the TDC joint and still provides insulation. The groove is created in the field to exactly match any joint location, even at a joint 7 of 17

8 Ponding Prevention On large ducts, a slight arch created by a strip of insulation keeps water from ponding on the duct without causing a leak-prone seam along the top. 8 of 17

9 Triple Seal System Sealant on the shiplap Butyl tape over the butt joints Caulk around the bands Stainless steel weather-seal screws Sealant and butyl stay flexible and sticky; caulk remains flexible with a tough, dry finish. The aluminum band is a fourth level of protection. 9 of 17

10 Access Doors Access doors for any purpose can be installed on any flat surface in the system 10 of 17

11 Inspection Plugs, Flashing Connections to walls and units are sealed with expanding foam, butyl tape, flashing, and UL 181 silicone. They are included in the 20- year warranty. Inspection plugs allow access to the interior without compromising the Techna-Duc seal 11 of 17

12 Support on the roof Standard Extra wind protection 12 of 17

13 Maximizing Cost Effectiveness Keeping duct walls below the 39-inch threshold reduces cost by simplifying fabrication Example 1 Example 2 Prices are for comparison only, and do not include installation, delivery, or other variables Analysis Example 1 minus Example 2 equals square foot savings or % savings $9.82 $7.27 $ % 13 of 17

14 Analysis Energy Analysis Units Techna-Duc Bare Sheet Metal Sheet Metal w/ R-4.2 FG wrap, wet $30 Annualized cost/sf Insulation Thickness Inches Installed Insulation Thickness Inches $25 Installed R-value US R-16 0 R-3.9 Installed R-value wet US R Cooling Loss BTU ft 2 1 hr 55,251 1,782, ,767 Total Cooling Loss BTU ft 2 1 hr 55,251 1,782, ,767 $20 Annual Cooling Loss MBTU 1 year Cost of total BTU loss $8 MBTU $1936 $62,472 $29,040 % loss compared to TechnaDuc % 3127% 1400% $15 Project: CASE STUDY Insulate square feet of roof top HVAC duct work $10 Spec. Comparison: 2" Thick Iso Board covered with EPDM vs. Techna-Duc Panel System 2" Iso Board and EPDM TECHNA-DUC Installation Labor Total Square Feet: Total Square Feet: Productivity SF/Day: 100 Productivity SF/Day: 288 Man Days Required: 350 Man Days Required: 121 Manhours (Days x 8): 2800 Manhours (Days x 8): 968 Cost per Manhour: $ 65 Cost per Manhour: $ 65 Labor Cost: $ 182,000 Labor Cost: $ 62,920 Material Cost EPDM and Iso Board: $ 5.25 sf TECHNA-DUC: $ sf Total Square Feet: Total Square Feet: Material Cost: $ 183,750 Material Cost: $ 350,000 Total Job Cost Labor Cost: $ 182,000 Labor Cost: $ 62,920 Material Cost: $ 183,750 Material Cost: $ 350,000 Project Cost: $ 365,750 Project Cost: $ 412,920 Installed Cost/SF: $ Installed Cost/SF: $ $5 $- Installed Cost per SF Year 4 Year 8 Fiberglass and Mastic Year 12 Year 16 TECHNA-DUC Cost does not include energy savings, nor maintenance, which is zero for Techna-Duc, but can be considerable for fiberglass/mastic depending on the maintenance and replacement schedule Year of 17

15 Performance Specification Part 1 GENERAL Scope This specification covers material, fabrication, and installation of an interlocking four-piece insulation panel system for exterior rectangular ductwork. Purpose A. Standardize material and design requirements. B. Provide alternate insulation system. Part 2 PRODUCTS Insulation A. Material. Insulation material applied shall be a glass reinforced polyisocyanurate foam insulation encased in 1.25 mil aluminum foil facers. B. Thickness. Insulation material shall be ½" thicker than required to cover duct supports and connection flanges. As a minimum, the overall insulation system shall be 1½" thick. C. Note: Polyisocyanurate of this required thickness does not meet the 25/20 fire code standards and should not be used for interior applications without proper approval from site fire safety personnel. Weather Barrier A. Weather barrier shall be fabricated of embossed aluminum sheeting, 0.032" in thickness. Vapor Barrier A. For purposes of sealing longitudinal and circumferential joints from vapor migration, a non-setting vapor barrier bedding compound joint sealant shall be utilized. Caulking Compound A. At weather barrier abutment locations, an industrial grade RTV caulk shall be utilized, where applicable. Putty A. Seams in weather barrier shall be covered and sealed with a ¾"wide by 1/8" thick butyl compound putty. Screws A. Screws utilized to fasten panel system together shall be #10½" selftapping, stainless steel, weather seal washer screws. Contact Cement A. Contact cement shall be utilized for laminating insulation material to the Tape A. Cast tape used for sealing insulation edges shall be a minimum thickness of 1.25 mil. weather barrier sheeting. Part 3 FABRICATION Sizing A. Panel system shall be sized to provide a top and side panel overlap equal to the thickness of the insulation being applied. Lamination A. Insulation shall be laminated to the weather barrier and sized to allow for sufficient overlap as indicated in section 2.1 above. Insulation shall be adhered utilizing appropriate contact cement. Insulation Joints A. Each panel will be constructed so that all vertical and horizontal insulation seams will have an interlocking and overlapping shiplap style joint to provide a thermal seal and allow for no direct heat transmission. The overlap shall be a minimum of ½" thick material. Part 4 STORAGE On Site A. Materials shall be stored on site in a dry environment. Only dry insulation materials shall be installed. B. Material shall be stored in such a way as to prevent breakage of or damage to the insulation panel system. C. In stored inside, materials shall be stored in an area fitted with sprinklers or other location approved by site safety personnel. Part 5 INSTALLATION Shop Fabrication A. Where feasible all general fabrication shall be performed in the shop and be based off of issued project drawing or direct field measurements. Field Fabrication A. Field fabrication should be limited to routing and sealing of the insulation panels to allow for duct angle, supports, gauges or other duct related necessities. B. All routed areas shall be resealed with appropriate foil faced cast tape. No insulation material shall be exposed to the environment. Installation A. Interlocking panel system shall be fitted into place on the rectangular ductwork. Prior to fitting, a minimum of a 3/8" bead of joint sealant shall be applied at each joint to serve as a vapor barrier. B. Material shall be fitted so that the vapor barrier seal is continuous and does not allow for water vapor infiltration. C. Once fitted, the panel system shall be fastened together with #10 self-tapping, stainless steel, and vapor seal screws on a maximum of 12" on center. For duct wider than 48", a bottom fastener should be utilized. Weather Proofing A. At all circumferential joints, a ¾" wide by 1/8" thick butyl compound putty shall be rolled onto the joint using a laminate roller sized to overlap the tape. B. The butyl compound shall be covered with a 3" wide aluminum cap fabricated from the same metal as the jacketing material. All seams of the aluminum cap shall be sealed with a 3/8" bead of RTV caulk, colored to match the panel system. All Specifications and material are subject to change without notice as new and better products are used. 15 of 17

16 Submittal Sheet Description Techna-Duc is a pre-manufactured panel system for insulating exterior ductwork. It is manufactured as four-piece interlocking panels whose exact configuration varies to match the shape of the ductwork. The interlocking panels are fabricated from polyisocyanurate insulation, laminated in two Layers, which provide an installed R-16. The insulation is jacketed with.032" embossed aluminum and sealed with vapor barrier compound. All joints interlock to insure an airtight seal. Panels are secured with #10 selftapping stainless screws with weather-seal washers. Recommended Uses Techna-Duc is for use on exterior rectangular ductwork. The interlocking panels provide a weather-tight seal and preserve thermal insulation value. Advantages Techna-Duc is a shop-fabricated panel system built from drawings or field measurements and installed with minimum field alterations. The interlocking panels are made from polyisocyanurate insulation, which does not promote the growth of mold or mildew. The panels are laminated for ease of installation over TDC joints. The interlocking panels prevent air penetration, intrusion of water, and water vapor. Techna-Duc panels are numbered per shop drawings for ease of installation. The panels are rigid enough to avoid sagging and withstand weathering. These unique features enable us to provide a 20-year limited warranty. Warranty Techna-Duc is backed by a limited 20-year warranty. No other duct insulation system offers the consumer this level of confidence. Insulation Physical properties Foil-Faced Board ASTM Result Density, pcf (kg/m 3 ) D-1622 Nominal 2 pcf (32) H 2 O Vapor E-96 < 0.03 transmission permeance, in perms Water absorption C-209 (24 hrs) < 0.3% Flexural strength in psi (kpa) Operating temp range F (C) C-203 > 40 psi (276) 2"-thick system R C-236/C-518 R-16 ½"-thick system R C-236/C-518 R ( ) System R-value is the sum of the stabilized R-value plus additional R-value calculated when the aluminum foil surface is installed next to a non-ventilated 3/4" air space (R-value = 2.8). All values from the ASHRAE Fundamentals Hbk. Quick Spec Outdoor Rectangular Duct Installation 1. Pre-manufactured panel system consisting of four-piece interlocking sets. 2. The interlocking panels shall be constructed of Dow Thermax polyisocyanurate insulation, ASTM D-1622, nominal 2 pcf; water vapor transmission as permeance less than 0.03, per ASTM E-96; water absorption less than 0.3% (24 Hours), per ASTM C-209; flexural strength more than 40 psi, per ASTM C Operating temperature range of -100 o F to +250 o F. 4. Insulation shall be laminated in two layers to provide an installed system value of R-16 at 2" thickness, per ASTM C-236/C The insulation shall be clad with 0.032"-thick embossed aluminum and sealed with vapor barrier compound. All joints shall interlock to ensure a thermal seal with no pass-through seams. 6. Panels shall be secured with #10 self-tapping stainless steel screws with weather-seal washers. 7. Manufacturers: Techna-Duc Insulation System as made by PTM Manufacturing, LLC, Newark, Delaware. 16 of 17

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