NOTE ** This section is based on flexible metal duct units produced by:
NOTE **
NOTE ** METALFLEX Division, Professional Duct Systems, Inc.
NOTE ** 6180 Boat Rock Boulevard, S. W.
NOTE ** Atlanta, GA 30336
NOTE ** Tel: (888) MTL-FLEX (888-685-3539)
NOTE **
NOTE ** Products include UL-listed non-insulated and insulated flexible aluminum duct, and non-listed acoustical insulated duct. METALFLEX UL-listed duct is approved for use under numerous building codes.
NOTE **
NOTE ** SECTION 15815 - FLEXIBLE DUCTWORK, Copyright 1997, The Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete items below not required for project.
A. Non-Insulated Flexible Duct.
B. Insulated Flexible Duct.
C. Acoustical Insulated Flexible Duct.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this project; add others as required.
A. Section 15810 - Ducts.
B. Section 15822 - Sound Attenuators.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not actually required by the text of the edited section.
A. ASTM C 518 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Apparatus.
B. ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
C. ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials.
D. NFPA 90A - Standard for Installation of Air Conditioning and Ventilating Systems; National Fire Protection Association.
E. NFPA 90B - Standard for Installation of Warm Air Heating and Air Conditioning Systems; National Fire Protection Association.
F. UL 181 - Standard for Factory Made Air Ducts and Air Connectors; Underwriters Laboratory.
1.4 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's product literature for each type unit.
NOTE ** Delete paragraph below if building code not cited in referenced Article.
C. Quality Assurance Submittals: Certified test reports from independent testing laboratory supporting compliance of products to Building Code cited in QUALITY ASSURANCE Article of this Section.
NOTE ** Delete Article below if only acoustical insulated duct units specified.
1.5 QUALITY ASSURANCE
A. Regulatory requirements: UL compliance; affix UL Listing Mark, with Class code, to each UL listed unit.
NOTE ** Edit subparagraph below for applicable jurisdiction; delete subparagraph if not applicable.
B. Code compliance: Units listed as complying with the following:
1. SBCC.
2. ICBO.
3. BOCA.
4. HUD 515-2.1(b).
5. City of Chicago, IL.
6. New York, NY.
7. San Francisco, CA.
8. Dade County, FL Building Code.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Acceptable Manufacturer: METALFLEX Division of Professional Duct Systems, Inc., 6180 Boat Rock Blvd., S.W., Atlanta, GA 30336. ASD. Tel: (888) MTL-FLEX (888-685-3539).
NOTE ** Delete one of the two following paragraphs; coordinate with Division 01 requirements.
B. Requests for substitutions will be considered in accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
D. Supply all products specified in this section from a single manufacturer.
2.2 NON-INSULATED FLEXIBLE AIR DUCT
A. Acceptable Product: METALFLEX V-100-UL.
NOTE ** Select product V-100-UL for compressed duct; select product V-100-S-UL for non-compressed duct.
B. Acceptable Product: METALFLEX V-100-S-UL.
C. Materials: Aluminum, formed into corrugated circular duct in eight foot length with watertight seams and continuous lock seam connection at each end.
D. Characteristics:
1. Meet requirements of UL 181.
2. Listed Class 0 Air Duct in accordance with NFPA 90A and NFPA 90B.
3. Fire Hazard Classification in accordance with ASTM E 84:
a. Flame Spread: Not exceeding 0.
b. Smoke Developed: Not exceeding 0.
4. Maximum velocity air handling capability: 5000 feet per minute.
5. Maximum operating pressure, positive and negative:
a. Duct diameter 3 inches to 10 inches: Plus or minus 12 inches WG.
b. Duct diameter 12 inches to 24 inches: Plus or minus 8 inches WG.
c. Operating temperature range: Minus 100 degrees F to plus 430 degrees F.
NOTE ** Retain sentence below if specifying product V-100-UL.
6. Ship duct lengths compressed to 2 feet, 8 inch length.
E. Accessories: Furnish each length with universal male/female connector at each end.
NOTE ** Paragraph above specifies standard accessories for product V-100-UL (compressed duct); paragraph below specifies standard accessories for product V-100-S-UL (non-compressed duct).
F. Accessories: Furnish each length with male/female connector one end.
2.3 INSULATED FLEXIBLE AIR DUCT
NOTE ** The V-200 product line has gray polyethylene vapor barrier. Select product V-200-UL for compressed duct; select product V-200-S-UL for non-compressed duct.
A. Acceptable Product: METALFLEX V-200-UL.
B. Acceptable Product: METALFLEX V-200-S-UL.
NOTE ** The V-250 product line has metalized film vapor barrier having greater moisture resistance than the V-200 product line. Select product V-250-UL for compressed duct; select product V-250-S-UL for non-compressed duct.
C. Acceptable Product: METALFLEX V-250-UL.
D. Acceptable Product: METALFLEX V-250-S-UL.
E. Materials:
1. Inner Duct Core: Aluminum, formed into corrugated circular duct in eight foot length with watertight seams and continuous lock seam connection at each end.
NOTE ** Standard insulating layer thickness is 1-1/2 inches; edit below if higher 'R' value is required.
NOTE ** The V-200 product line has gray polyethylene vapor barrier; the V-250 product line has metalized film vapor barrier.
3. Vapor Barrier: Polyethylene, gray color, having 0.10 Perm rating in accordance with ASTM E 96, Procedure A.
4. Vapor Barrier: Metalized film, having 0.05 Perm rating in accordance with ASTM E 96, Procedure A.
F. Characteristics:
1. Meet requirements of UL 181.
2. Listed Class 1 Air Duct in accordance with NFPA 90A and NFPA 90B.
3. Fire Hazard Classification in accordance with ASTM E 84:
a. Flame Spread: Not exceeding 25.
b. Smoke Developed: Not exceeding 50.
4. Maximum velocity air handling capability: 5000 feet per minute.
5. Maximum operating pressure, positive and negative:
a. Duct diameter 4 inches to 10 inches: Plus or minus 12 inches WG.
b. Duct diameter 12 inches to 20 inches: Plus or minus 8 inches WG.
6. Operating temperature range: Minus 20 degrees F to 250 degrees F.
NOTE ** Ratings specified below are standard; edit if higher thermal efficiency required.
7. Thermal efficiency:
a. C-factor, calculated at 75 degrees F mean: 0.173.
b. R-Value, calculated by ADC FD72-R1 method: 5.79 average.
c. R-Value, calculated by ASTM C 518 method: 4.2 average.
NOTE ** Retain sentence below if specifying product V-200-UL or V-250-UL.
8. Ship duct lengths compressed to 2 feet, 8 inch length.
G. Accessories: Furnish each length with universal male/female connector at each end.
NOTE ** Paragraph above specifies standard accessories for products V-200-UL and V-250-UL (compressed duct); paragraph below specifies standard accessories for products V-200-S-UL and V-250-S-UL (non-compressed duct).
H. Accessories: Furnish each length with male/female connector one end.
2.4 ACOUSTICAL INSULATED FLEXIBLE AIR DUCT
NOTE ** Product V-450-S-DB has metalized film vapor barrier with high moisture resistance. The product is non-compressed duct.
A. Acceptable Product: METALFLEX V-450-S-DB.
B. Materials:
1. Inner Duct Core: Aluminum, formed into corrugated circular duct in eight foot length with watertight seams and continuous lock seam connection at each end.
