Insulated Duct 8"

DUCT, INSULATED, 8".

1: ALL INSULATED DUCT SHALL BE PROVIDED IN TWENTY FIVE FOOT
LENGTHS.
2: ALL INSULATED DUCT SHALL BE PROVIDED WITH CUFFED ENDS
THAT ARE A MINIMUM OF (THREE) 3" AND A MAXIMUM OF (SIX) 6".
3: THE COLOR OF THE INSULATED DUCT MAY BE BLACK, BLUE,
SILVER, OR GRAY. THE INSULATED DUCT WILL NOT BE YELLOW,
MAGENTA, RED, OR CONTAIN ANY OF THESE COLORS.
4: THE INSULATED DUCT SHALL BE CAPABLE OF WITHSTANDING
TEMPERATURES RANGING FROM THIRTY-TWO (32) DEGREES
FAHRENHEIT
TO TWO HUNDRED FIFTY (250) DEGREES FAHRENHEIT.
5: THE INSULATED DUCT SHALL BE REINFORCED WITH A STEEL
HELIX WOUND WIRE.
6: THE INSULATED DUCT SHALL MEET OR EXCEED UL-94-0 FOR FIRE
RETARDANCY.
7: THE INSULATED DUCT SHALL BE FIRE RETARDANT PER FEDERAL
TEST METHOD AND THE RESULTS SHALL MEET OR EXCEED THE
CRITERION GIVEN IN PARAGRAPH 3.3.9.3 OF MIL-H-18158E. (NOTE:
REMAINDER OF MIL-H-18158E IS NOT APPLICABLE.)
8: THE INSULATED DUCT SHALL BE NEOPRENE COATED COTTON OR
POLYESTER FABRIC, INTERIOR AND EXTERIOR AND MUST BE
WEATHERPROOF IN ORDER TO PREVENT THE SATURATION OF THE
INSULATING MATERIAL.
9: THS INSULATED DUCT SHALL HAVE A "R" FACTOR RATING OF 0.7
MINIMUM AND 1.4 MAXIMUM.
10: POUNDS OF FORCE REQUIRED TO CRUSH ONE FOOT OF DUCT TO
1/2 OF ITS DIAMETER SHALL BE 20 OR GREATER.
11: a) THE MANUFACTURERS NAME AND DATE OF MANUFACTURE
SHALL BE PRINTED ON EACH LENGTH OF INSULATED DUCT.
b) DUCTS SHALL BE MAKED “FR” OR FIRE RESISTANT BY THE
MANUFACTURER. MARKS SHALL BE PLACED AT EACH END AND AT
LEAST IN TWO OTHER PLACE EQUALLY SPACED ALONG THE LENGHT
OF THE DUCT.
c) MARKINGS SHALL BE IN CONTRASTING PERMANENT INK, IN
LETTERS AND NUMBERS THREE-QUARTERS (3/4") TO ONE (1") INCH IN
HEIGHT.
12: REQUIRED PRODUCT FROM FLEXAUST (2 98683) ARTIC DUCT VII 8”
x 25’. ANY OTHER MANUFACTOR BRANDED PRODUCT WILL NEED TO
PROVIDE A TWO (2) FOOT SAMPLE OF INSULATED DUCT WITH EACH
BID PROPOSAL. THIS REQUIREMENT MAY BE WAIVED IF THE
CONTRACTOR HAS PROVIDED AN APPROVED SAMPLE PREVIOUSLY.