Next Generation
Heat Mirror® IG product guide
Commercial applications
True design freedom—with glass that insulates like a wall
With thermal insulation approaching that of the surrounding walls, Heat Mirror®
multicavity insulating glass (IG) units enable architects and engineers to design
curtain wall, storefront, and operable window systems that meet the most stringent
requirements for energy efficiency and occupant comfort.
Heat Mirror insulating glass contains one or more clear, low-emissivity films suspended
within the sealed airspace of a dual-pane IG unit to create up to four superinsulating
cavities that buffer against heat loss or heat gain. By combining with high-performance
low-emissivity glass and argon or krypton gas fill, Heat Mirror IG can be used to
tune envelop performance by either maximizing or minimizing solar heat gain while
optimizing daylighting and views. In fact, Heat Mirror IG helps reduce energy costs with
center-of-glass U-value as low as 0.05 that maintains a warm glass surface temperature
for a comfortable internal environment year round.
Higher performance, lighter weight, and lower environmental impact than triple pane
Heat Mirror IG weighs up to 33% less than comparably sized
triple-pane IG, eliminating the need for expensive reinforced
framing systems or additional installation labor, which makes it
an ideal drop-in solution for standard framing systems designed
for dual-pane IG. Also, a comprehensive Life Cycle Analysis
completed by Eastman shows that replacing the third lite of
glass with film enables Heat Mirror IG to consume 30% less
energy cradle to gate than triple-pane IG.1 And because film is
practically weightless, multiple films can be used to reach a new
level of insulating performance needed for the latest Passive
House, Net Zero Energy, and LEED Platinum/Gold-rated designs.
U-value performance comparison (6-mm glass)
Argon 90% gas fill
0.28
0.28
Dual pane
0.26
0.18
0.16
0.14
0.12
U-value COG(Btu/h-ft2–°F)
Heat Mirror film x2
0.20
Triple pane
0.24
Heat Mirror film x1
0.22
Dual pane
0.26
Triple pane
0.24
U-value COG(Btu/h-ft2–°F)
Krypton 90% gas fill
Heat Mirror film x1
0.22
Heat Mirror film x2
0.20
Heat Mirror film x3
0.18
0.16
0.14
0.12
0.10
0.10
0.08
0.08
Heat Mirror advantage
0.06
0.06
Heat Mirror advantage
0.04
0.04
1
1¼
1½
1¾
IG overall thickness (inches)
2
1
1¼
Performance comparison configuration detail
Heat Mirror IG = VE12M/HM88f (x1/x2)/Clear; Triple-pane IG = VE12M/VE185/Clear; Dual-pane IG = VE12M/Clear
Gas fill: Argon 90%; Krypton 90%
Performance data calculated using WINDOW 6.3 software using standard NFRC environmental conditions.
1
Pending third-party review
1½
1¾
IG overall thickness (inches)
2
Next Generation
Project facts
Project:
Location:
Architect:
Glazing contractor:
Glass supplier:
IG technology:
David & Lucile Packard Foundation
Los Altos, California USA
EHDD, San Francisco
Architectural Glass & Aluminum (AGA)
Cardinal Glass Industries
Heat Mirror® dual-cavity IG
High solar heat gain (High SHGC) representative configurations*
Outside
dimension
Glass
config.
Heat
Mirror film
Gas fill
in.
mm
1
25
Clear/clear
TC88
1
25
LowE1/clear
HM88
1
25
Clear/clear
1
25
1.75
1.75
Glass
thickness
U-factor
performance
Solar gain
performance
SHGC
SC
1.18
0.47
1.15
0.48
0.15
0.83
0.14
0.80
6
0.11
0.59
0.41
6
0.10
0.59
0.39
1/4
6
0.08
0.46
0.41
1/4
6
0.08
0.45
0.38
in.
mm
IP units
SI units
Argon - 90%
1/4
Argon - 90%
1/4
6
0.21
6
0.20
TC88
Krypton - 90%
1/4
6
LowE1/clear
HM88
Krypton - 90%
1/4
6
44
LowE1/clear
44
Clear/clear
HM88 x 2
Argon - 90%
1/4
TC88 x 2
Argon - 90%
1/4
1.75
44
LowE1/clear
HM88 x 2
Krypton - 90%
1.75
44
Clear/clear
TC88 x 2
Krypton - 90%
Visible performance
Tsol
Tvis
0.54
0.35
0.55
0.39
0.47
0.54
0.48
0.55
Tuv
Rvis ext.
Rvis int.
0.64
0.15
0.14
0.68
0.18
0.17
0.003
0.35
0.64
0.15
0.14
0.004
0.39
0.68
0.18
0.17
0.003
0.48
0.31
0.60
0.21
0.20
0.000
0.44
0.25
0.52
0.15
0.13
0.000
0.48
0.31
0.60
0.21
0.20
0.000
0.44
0.25
0.52
0.15
0.13
0.000
0.004
Low solar heat gain (Low SHGC) representative configurations*
Outside
dimension
Glass
config.
Heat
Mirror film
Gas fill
Glass
thickness
in.
mm
in.
1
25
Clear/clear
SC75
Argon - 90%
1/4
1
25
LowE2/clear
HM88
Argon - 90%
1/4
1
25
LowE3/clear
HM88
Argon - 90%
1/4
1
25
LowE2/clear
HM77
Argon - 90%
1
25
LowE3/clear
HM77
1
25
Clear/clear
SC75
1
25
LowE2/clear
HM88
1
25
LowE3/clear
HM88
1
25
LowE2/clear
mm
U-factor
performance
Solar gain
performance
SHGC
IP units
SI units
SC
6
0.24
1.36
0.35
0.41
6
0.20
1.14
0.35
0.41
6
0.20
1.12
0.25
0.28
1/4
6
0.19
1.10
0.31
0.35
Argon - 90%
1/4
6
0.19
1.08
0.22
Krypton - 90%
1/4
6
0.17
0.99
0.35
Krypton - 90%
1/4
6
0.14
0.78
0.35
Krypton - 90%
1/4
6
0.13
0.76
0.24
HM77
Krypton - 90%
1/4
6
0.13
0.73
0.30
Visible performance
Tsol
Tuv
Tvis
Rvis ext.
Rvis int.
0.28
0.62
0.21
0.19
0.005
0.29
0.62
0.13
0.15
0.003
0.20
0.55
0.13
0.15
0.001
0.25
0.55
0.19
0.22
0.002
0.26
0.18
0.50
0.17
0.22
0.001
0.40
0.28
0.62
0.21
0.19
0.005
0.40
0.29
0.62
0.13
0.15
0.003
0.28
0.20
0.55
0.13
0.15
0.001
0.35
0.25
0.55
0.19
0.22
0.002
1
25
LowE3/clear
HM77
Krypton - 90%
1/4
6
0.13
0.71
0.22
0.25
0.18
0.50
0.17
0.22
0.001
1.75
44
LowE2/clear
HM88 x 2
Argon - 90%
1/4
6
0.10
0.58
0.31
0.36
0.24
0.54
0.15
0.18
0.000
1.75
44
LowE3/clear
HM88 x 2
Argon - 90%
1/4
6
0.10
0.58
0.22
0.25
0.18
0.49
0.15
0.18
0.000
1.75
44
LowE2/clear
HM77 x 2
Argon - 90%
1/4
6
0.10
0.54
0.25
0.28
0.19
0.45
0.24
0.28
0.000
1.75
44
LowE3/clear
HM77 x 2
Argon - 90%
1/4
6
0.09
0.53
0.18
0.21
0.14
0.40
0.21
0.28
0.000
1.75
44
Clear/clear
SC75 x 2
Argon - 90%
1/4
6
0.11
0.65
0.27
0.31
0.20
0.48
0.24
0.21
0.000
1.75
44
LowE2/clear
HM88 x 2
Krypton - 90%
1/4
6
0.08
0.45
0.31
0.36
0.24
0.54
0.15
0.18
0.000
1.75
44
LowE3/clear
HM88 x 2
Krypton - 90%
1/4
6
0.08
0.44
0.22
0.25
0.18
0.49
0.15
0.18
0.000
1.75
44
LowE2/clear
HM77 x 2
Krypton - 90%
1/4
6
0.07
0.40
0.24
0.28
0.19
0.45
0.24
0.28
0.000
1.75
44
LowE3/clear
HM77 x 2
Krypton - 90%
1/4
6
0.07
0.39
0.18
0.20
0.14
0.40
0.21
0.28
0.000
1.75
44
Clear/clear
SC75 x 2
Krypton - 90%
1/4
6
0.09
0.51
0.26
0.30
0.20
0.48
0.24
0.21
0.000
LE1 = single-silver Low-E; LE2 = double-silver Low-E; LE3 = triple-silver Low-E
*For a comprehensive list of product configurations, go to www.heatmirror.com/downloads.
Project facts
Project:
Location:
General contractor:
Glazing contractor:
Energy savings target:
CO2 reduction:
Empire State Building
New York
Johnson Controls
Serious Materials
$4.4 million
105,000 metric tons -15 yrs
Key Heat Mirror® IG attributes
Product ratings and test results
• Provides center-of-glass U-value performance as low as 0.05
• IGCC Insulating Glass Certification Council—ASTM E2190
• Offers superior winter heating and summer cooling due to its
superinsulating multicavity design
• Insulating Glass Manufacturers Alliance (IGMA)—ASTM E2190
• Blocks 99% of harmful UV rays
• Complies with Thermal Aging and Ultraviolet Exposure test per
ASTM D-882, G-53
• Maintains a warm glass surface temperature for maximum
comfort and minimum condensation during winter
• Passed Canadian Ultraviolet Fogging testing per NRCC CAN2-12
8-M76
• Weighs about 33% less than triple-pane glass; Drop-in solution
for framing systems designed for dual-pane glass
• Improves STC by up to 4 dB over dual-pane IG and can be used
with laminated glass for maximum noise abatement
Eastman Chemical Company
Corporate Headquarters
P.O. Box 431
Kingsport, TN 37662-5280 U.S.A.
U.S.A. and Canada, 800-EASTMAN (800-327-8626)
Other Locations, +(1) 423-229-2000
www.eastman.com/locations
Although the information and recommendations set forth herein are presented in good faith, Eastman Chemical
Company and its subsidiaries make no representations or warranties as to the completeness or accuracy thereof.
You must make your own determination of its suitability and completeness for your own use, for the protection
of the environment, and for the health and safety of your employees and purchasers of your products. Nothing
contained herein is to be construed as a recommendation to use any product, process, equipment, or formulation
in conflict with any patent, and we make no representations or warranties, express or implied, that the use thereof
will not infringe any patent. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR OF ANY OTHER NATURE ARE MADE HEREUNDER
WITH RESPECT TO INFORMATION OR THE PRODUCT TO WHICH INFORMATION REFERS AND NOTHING HEREIN
WAIVES ANY OF THE SELLER’S CONDITIONS OF SALE.
Safety Data Sheets providing safety precautions that should be observed when handling and storing our products
are available online or by request. You should obtain and review available material safety information before
handling our products. If any materials mentioned are not our products, appropriate industrial hygiene and other
safety precautions recommended by their manufacturers should be observed.
© 2015 Eastman Chemical Company. Eastman brands referenced herein are trademarks of Eastman Chemical
Company or one of its subsidiaries. The ® used on Eastman brands denotes registered trademark status in the U.S.;
marks may also be registered internationally. Other companies’ brands referenced herein are trademarks of their
respective owners.
AI-HM-004a
7/15