LCA results & interpretation Atmosphere® Duct Wrap
Scope and summary
- Cradle to gate
- Cradle to gate with options
- Cradle to grave
Application
Atmosphere® Duct Wrap is designed for external insulation on commercial or residential heating and air conditioning units. It is suitable for the exterior of rectangular or round sheet metal ducts, as well as spaces or surfaces where temperature and condensation must be controlled.
Functional unit
One square meter of installed insulation material, packaging included, with a thickness that gives an average thermal resistance of RSI = 1m2·K/W with a building service life of 75 years.
Reference service life: 75 years when installed per manufacturer’s instructions
Reference flow: 0.772 kg of product with foil skrim kraft (FSK) facer.
A thickness of 0.0388m achieves the functional unit. (ASTM C518)
Manufacturing data
Reporting period: January 2022 – December 2022
Location: Lanett, AL
Default installation, packaging, and disposal scenarios
At the installation site, insulation products are unpackaged and installed. Staples may be used to install rolls. The potential impact of the staples is assumed to be negligible since their use is spread out over hundreds of rolls of product; therefore, they were not included in the model.
No material is assumed to be lost or wasted. Scraps are typically used to fill corners or crevices. Plastic packaging waste is disposed (9% to recycling, 68% to landfill, and 17% to incineration), and no maintenance or replacement is required over the life of the building. After removal, the insulation is assumed to be landfilled. Insulation and packaging waste are assumed to be transported 100 miles for disposal.
FSK faced product composition and impacts
What’s causing the greatest impacts
All life cycle stages
The manufacturing stage dominates all impact categories. The energy required to melt the glass and produce the glass fibers is the largest contributor to the manufacturing stage. The impact of the raw material acquisition stage is mostly due to the batch and binder materials. The contributions to outbound transportation are caused by the use of trucks and rail transport. The only impacts associated with installation and maintenance are due to the disposal of packaging waste, which is the smallest contributor of all the stages. At the end of life, insulation is manually removed from the building and landfilled. For all products, waste is dominated by the final disposal of the product. Non-hazardous waste accounts for waste generated during manufacturing and installation.
Raw materials acquisition and transportation
The raw material acquisition stage is the second highest contributor for all impact categories. The raw materials acquisition stage impact is largely due to the borax, manganese oxide, and soda ash in the batch and the sugars in the binder. Third-party verified ISO 14040/44 secondary LCI data sets contribute more than 80% of the total impacts to ozone depletion.
Manufacturing stage
The manufacturing stage has the most significant contribution to all impact categories, primarily due to the energy required to melt the glass and produce the glass fibers. The raw material acquisition stage is the second highest contributor for all impact categories. Since some batch ingredients significantly contribute to the respiratory effects category, they can lead to higher impact results in the raw materials acquisition stage. However, since sand and borax are melted in the oven with the other batch materials, they are not released into the air as fine particulates. Therefore, the calculated potential impacts as shown in the results tables are likely much larger than the actual impacts in the raw material acquisition stage. This implies that the manufacturing stage may have a greater share of the impact than what is displayed in the total impacts by life cycle stage.
Distribution
Outbound transportation is the third highest contributor to smog impacts.
End of life
The end-of-life impacts are largely due to landfilling of the product after it has been removed from the building and transported to a landfill. Since materials are assumed to be landfilled at the end of life rather than incinerated or reused/recycled, no materials are available for energy recovery or reuse/recycling.
Embodied carbon
Embodied carbon can be defined as the cradle-to-gate (A1-A3) global warming potential impacts. The total embodied carbon per functional unit of FSK faced Atmosphere® Duct Wrap insulation manufactured in Lanett, AL is 2.12E+00 kg CO2-eq.
How we're making it greener
Knauf is committed to providing products that conserve energy and preserve natural resources.
- These products use ECOSE® Technology, which is a plant-based binder adhesive instead of a fossil fuel based binder.
- Our products contain a high degree of recycled content, which translates to 20% less glass melting energy and a 25% reduction in embodied carbon.
- Our utilization of recycled content reduces mining impacts by 60%. In fact, Knauf products combined use 10 railcars of recycled glass a day.
- All glass fiber made by Knauf is audited by a 3rd party to ensure biosoluble chemistry from a health and safety standpoint.
LCA results
| Life cycle stage | Raw material acquisition | Manufacturing | Transportation | Installation and maintenance | Disposal/ reuse/ recycling |
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Information modules: *Module D is also excluded from this system boundary (MND). |
(X) A1 Raw materials | (X) A3 Manufacturing | (X) A4 Distribution | (X) A5 Installation | (X) C1 Deconstruction |
| (X) A2 Transportation | (X) B1 Use | (X) C2 Transportation | |||
| (X) B2 Maintenance | (X) C3 Waste processing | ||||
| (X) B3 Repair | (X) C4 Disposal | ||||
| (X) B4 Replacement | |||||
| (X) B5 Refurbishment | |||||
| (X) B6 Operational energy use | |||||
| (X) B7 Operational water use | |||||
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SM Single Score
Learn about SM Single Score results| Impacts per 1 square meter of insulation material | 8.07E-03 mPts | 2.10E-02 mPts | 4.20E-04 mPts | 2.91E-05 mPts | 5.80E-04 mPts |
| Materials or processes contributing >20% to total impacts in each life cycle stage | Batch material and binder material production. | Energy required to melt the glass and produce the glass fibers. | Truck and rail transportation used to transport product to building site. | Transportation to landfill and landfilling of packaging materials. | Transportation to landfill and landfilling of product at end of life. |
TRACI v2.1 results per functional unit (FSK faced Atmosphere® Duct Wrap - Lanett, AL)
| Life cycle stage | Raw material acquisition | Manufacturing | Transportation | Installation and maintenance | Disposal/ reuse/ recycling |
Ecological damage
Human health damage
Additional environmental information
| Impact category | Unit | |||||
| Carcinogenics | CTUh Comparative Toxic Units of Human cancerous toxicity Carcinogens have the potential to form cancers in humans. |
2.5% | 94.6% | 0.2% | 0.0% | 2.6% |
| Non-carcinogenics | CTUh Comparative Toxic Units of Human non-cancerous toxicity Non-Carcinogens have the potential to causes non-cancerous adverse impacts to human health. |
5.7% | 88.2% | 0.4% | 0.1% | 5.6% |
| Ecotoxicity | CTUe Comparative Toxic Units of Ecotoxicity Ecotoxicity causes negative impacts to ecological receptors and, indirectly, to human receptors through the impacts to the ecosystem. |
7.4% | 90.7% | 0.9% | 0.0% | 0.9% |
| Fossil fuel depletion | MJ surplus Mega Joule, lower heating value Fossil fuel depletion is the surplus energy to extract minerals and fossil fuels. |
3.63E-01 | 3.10E+00 | 4.25E-02 | 1.37E-03 | 5.50E-02 |
References
LCA Background Report
Knauf Insulation North America and Manson Insulation Products LCA Background Report (public version), Knauf Insulation North America (KINA) updated in 2024 to include wrap products; developed using the TRACI v2.1 and CML impact assessment methodologies, and LCA for Experts modeling software.
ISO 14025, “Sustainability in buildings and civil engineering works -- Core rules for environmental product declarations of construction products and services”
ISO 21930:2017 serves as the core PCR along with UL Part A.
UL Part A: Life Cycle Assessment Calculation Rules and Report Requirements v4.0
March, 2022. PCR review conducted by Lindita Bushi, PhD, Chair (Athena Sustainable Materials Institute), [email protected]; Hugues Imbeault-Tétreault (Group AGECO); and Jack Geibig (Ecoform).
UL Part B: Building Envelope Thermal Insulation EPD Requirements, v2.0
April, 2018. PCR review conducted by Thomas Gloria, PhD, Chair (Industrial Ecology Consultants) [email protected]; Christoph Koffler, PhD (thinkstep); Andre Desjarlais (Oak Ridge National Laboratory).
UL Environment General Program Instructions v2.4, July 2018 (available upon request)
Download PDF SM Transparency Report / EPD
SM Transparency Reports (TR) are ISO 14025 Type III environmental declarations (EPD) that enable purchasers and users to compare the potential environmental performance of products on a life cycle basis. Environmental declarations from different programs (ISO 14025) may not be comparable. Comparison of the environmental performance of products using EPD information shall be based on the product’s use and impacts at the building level, and therefore EPDs may not be used for comparability purposes when not considering the building energy use phase as instructed under this PCR. Full conformance with the PCR for Building Envelope Thermal Insulation allows EPD comparability only when all stages of a life cycle have been considered. However, variations and deviations are possible. Example of variations: Different LCA software and background LCI datasets may lead to differences results for upstream or downstream of the life cycle stages declared.
SM Transparency Report (EPD) 