15891-1
SECTION 15891
DUCT INSULATION
PART 1 - GENERAL
1.1 DESCRIPTION
A. Work Included: Provide and install all duct insulation as shown on the Drawings
and specified herein.
B. Related Work Specified Elsewhere: "HVAC - General" is specified in this Division.
12 QUALITY ASSURANCE
A. Fire Hazard Rating: When tested by ASTM E84 method flame spread rating shall
not exceed 25.
B. Acceptable Manufacturers:
1. Closed cellular flexible plastic:
a. Armacell "AP/ARMAFLEX",
b. Rubetex.
c. Or approved equal
2. Fiberglass:
a. Owens-Corning.
b. Knauf.
c. Certainteed.
d. Or approved equal.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Duct insulation for wet area locations:
1. Wet areas
a. Grit Building
2. Closed cellular flexible plastic:
a. One inch thick
b. Thermal conductivity @ 75°F: 0.27/inch minimum
c. UL flame spread: 25 or less
d. Equal to Armacell AP/ARMAFLEX
B. Duct insulation for non-wet area locations.
1. Ductwork:
a. 1% inch thick fiberglass ductwrap
b. Factory applied reinforced aluminum or vinyl vapor barrier facing.
c. Thermal conductivity @ 75°F: .26/inch minimum
d. Equal to Owens-Corning series ED-100 FRK-25
2. Plenums and duct sections with one side 48" or larger:
a. 1% inch thick rigid industrial fiberglass insulating board
b. Factory applied reinforced aluminum or vinyl vapor barrier facing
c. Thermal conductivity @ 75°F: .24/inch minimum
13089K
