ASTM C1668-09
(Specification)Standard Specification for Externally Applied Reflective Insulation Systems on Rigid Duct in Heating, Ventilation, and Air Conditioning (HVAC) Systems
Standard Specification for Externally Applied Reflective Insulation Systems on Rigid Duct in Heating, Ventilation, and Air Conditioning (HVAC) Systems
ABSTRACT
This specification establishes the physical and performance requirements, and the corresponding test methods, for the evaluation of reflective insulation systems that are applied externally to rigid ducts in heating, ventilation, and air conditioning (HVAC) systems operating at specified temperatures. The products covered here are classified into five types according to the substrate material used, namely: Type A, product with polyethylene foam substrate; Type B, product with polyethylene bubble pack substrate; Type C, product with fiberglass substrate; Type D, product with polyester fiber substrate; and Type E, product with kraft paper substrate. Properly sampled specimens shall undergo test procedure to examine their conformance with the following requirements: emittance, water vapor permeance, surface burning characteristics, aging resistance, adhesive performance (bleeding and delamination), pliability, fungi resistance, thermal resistance, and hot-surface performance.
SCOPE
1.1 This specification covers the requirements and physical properties of reflective insulation systems applied externally to Rigid Heating, Ventilation, and Air Conditioning (HVAC) duct systems operating at or below 250ºF (121.1 °C). These insulation systems consist of one or more low-emittance surfaces, such as metallic foil or metallic deposits, mounted on substrates to produce reflective air spaces. Reflective insulation systems derive their thermal performance from surfaces with an emittance of no greater than 0.1 facing enclosed air spaces.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: C1668 – 09
Standard Specification for
Externally Applied Reflective Insulation Systems on Rigid
Duct in Heating, Ventilation, and Air Conditioning (HVAC)
Systems
This standard is issued under the fixed designation C1668; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C1338 Test Method for Determining Fungi Resistance of
Insulation Materials and Facings
1.1 This specification covers the requirements and physical
C1371 Test Method for Determination of Emittance of
properties of reflective insulation systems applied externally to
Materials Near Room Temperature Using Portable Emis-
Rigid Heating, Ventilation, andAir Conditioning (HVAC) duct
someters
systems operating at or below 250ºF (121.1 °C). These
E84 Test Method for Surface Burning Characteristics of
insulation systems consist of one or more low-emittance
Building Materials
surfaces, such as metallic foil or metallic deposits, mounted on
E96/E96M Test Methods for Water Vapor Transmission of
substratestoproducereflectiveairspaces.Reflectiveinsulation
Materials
systems derive their thermal performance from surfaces with
E2231 Practice for Specimen Preparation and Mounting of
an emittance of no greater than 0.1 facing enclosed air spaces.
Pipe and Duct Insulation Materials to Assess Surface
1.2 The values stated in inch-pound units are to be regarded
Burning Characteristics
as standard. The values given in parentheses are mathematical
2.2 Other Test Method:
conversions to SI units that are provided for information only
TAPPI Standard T-512 sp-02 Creasing of Flexible Packag-
and are not considered standard.
ing Material Paper Specimens for Testing
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions:
priate safety and health practices and determine the applica-
3.1.1 Unless otherwise noted, the terms used in this speci-
bility of regulatory limitations prior to use.
fication conform to Terminology C168.
2. Referenced Documents 3.2 Definitions of Terms Specific to This Standard:
2 3.2.1 HVAC ducts—as pertaining to this standard, ducts
2.1 ASTM Standards:
having rigid rectangular or circular cross-section used to
C168 Terminology Relating to Thermal Insulation
transfer air from the air handling equipment to the conditioned
C335 Test Method for Steady-State Heat Transfer Proper-
space and return.
ties of Pipe Insulation
3.2.2 insulation spacers—material used to form enclosed
C390 Practice for Sampling and Acceptance of Thermal
air spaces that are interior to the reflective insulation system.
Insulation Lots
3.2.3 reflective insulation—thermal insulation consisting of
C411 Test Method for Hot-Surface Performance of High-
one or more low emittance surfaces, bounding one or more
Temperature Thermal Insulation
enclosed air space(s). C168
C1045 PracticeforCalculatingThermalTransmissionProp-
erties Under Steady-State Conditions
4. Classification
C1258 Test Method for Elevated Temperature and Humid-
4.1 Products covered by this specification are classified
ity Resistance of Vapor Retarders for Insulation
according to the substrate material and have the physical
properties as listed in Table 1.
4.1.1 Type A—Product with polyethylene foam substrate.
This specification is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.21 on
4.1.2 Type B—Product with polyethylene bubble pack sub-
Reflective Insulation.
strate.
Current edition approved May 15, 2009. Published June 2009. DOI: 10.1520/
4.1.3 Type C—Product with fiberglass substrate.
C1668-09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available from TechnicalAssociation of the Pulp and Paper Industry (TAPPI),
the ASTM website. 15 Technology Parkway South, Norcross, GA 30092, http://www.tappi.org.
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C1668 – 09
TABLE 1 Classification Criteria
test procedure in 10.5. Disregard bleeding at cut edges.
Property Type A Type B Type C Type D Type E Bleeding or delamination, shall be cause for rejection.
7.6 Pliability—Specimens tested in accordance with the
Emittance # 0.10 # 0.10 # 0.10 # 0.10 # 0.10
Max. Flame Spread Index 25 25 25 25 25
procedure in 10.6 shall not show cracking or delamination.
Max. Smoke Developed Index 50 50 50 50 50
7.7 Fungi Resistance—Specimens shall not have growth
Hot Surface Performance Min. Min. Min. Min. Min.
greater than the comparative item (southern yellow pine) when
250ºF 250ºF 250ºF 250ºF 250ºF
Water Vapor Permeance (perms) 0.02 0.02 0.02 0.02 0.02
tested in accordance with 10.7. Use interpretation of results in
7.2 of Test Method C1338.
7.8 Thermal Resistance—Determine the thermal resistance
4.1.4 Type D—Product with polyester fiber substrate.
in accordance with procedures in 10.8. The surface-to-surface
4.1.5 Type E—Product with kraft paper substrate.
R-value of a test assembly shall not be less than 95 % of the
label value when tested in accordance with 10.8.
5. Ordering Information
7.9 Hot-Surface Performance—Determine the Hot-Surface
5.1 Specify the required thermal resistance.
performance in accordance with procedures in 10.9. The
5.2 Specify the number of layers of insulation, width,
minimum temperature requirement is 250ºF (121.1°C).
thickness of the insulation system and the configuration of the
duct(s) to be insulated.
8. Workmanship, Finish and Appearance
5.3 Special markings, if required, shall be specified.
8.1 The insulation system shall be manufactured, packaged
5.4 Special performance requirements, if any.
and shipped in such a manner that, when received, it shall be
suitable for installation.
6. Materials and Manufacture
6.1 Reflective insulation shall consist of low-emittance
9. Sampling
surface(s) with substrates and adhesives required to meet the
9.1 Sampling shall be performed in accordance with Prac-
specified thermal performance and physical properties. Air
tice C390.
spaces shall be maintained by use of insulation spacers.
6.2 Multiple layer reflective insulation shall be designed to
10. Test Methods
attain the intended separation of layers. The design separation
shall be maintained by the use of proper size, location and 10.1 Emittance—The emittance of the product shall be
method of securing the insulation spacers to the duct system. tested in accordance with Test Method C1371.
6.3 Dimensions—Insulation and properly sized insulation 10.2 Water Vapor Permeance—The permeance of the insu-
spacers shall be furnished in dimensions specifically agreed lation product shall be tested in accordance with Test Method
upon between the producer and the buyer. E96/E96M (Desiccant Method).
10.3 Surface Burning Characteristics—The surface burning
7. Physical Properties
characteristics shall be determined in accordance with Test
7.1 Emittance—Low-emittance surfaces used for this insu- Method E84 and Practice E2231.
lation shall have a surface emittance of 0.1 or less, as 10.4 Aging Resistance—The aging resistance of the product
determined in accordance with 10.1. shall be determined in accordance with Test Method C1258.
7.2 Water Vapor Permeance—The water vapor permeance 10.5 Adhesive Performance
shall be determined in accordance with 10.2 and shall meet the 10.5.1 Bleeding and Delamination:
requirements of Table 1. 10.5.2 Scope—This test method covers the determination of
7.3 Surface Burning Characteristics—Surface Burning bleeding and delamination of the reflective insulation.
Characteristics shall be determined in accordance with 10.3. 10.5.3 Significance and Use—It is necessary that reflective
The maximum flame spread index shall not exceed 25 and the
insulation not show adhesive bleeding or delamination since
maximum smoke developed index shall not exceed 50. this could cause a loss of structural integrity, a change to the
7.4 Aging Resistance—The laminates of the reflective insu- emittance or a change in water permeability, or both.
lation shall be tested for aging resistance in accordance with 10.5.4 Sampling—A minimum of three specimens of the
10.4. Three specimens shall be tested. The test specimens shall reflective insulation, with dimensions of approximately 3 by 6
be shielded from condensate that drips from the ceiling of the in. (7.62 by 15.24 cm), shall be tested. The specimens shall be
humidity chamber during the test. cut from separate locations on a roll or panel
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