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This calculator can be used to estimate total annual methane emissions from your company.

CMR Fostering Collaborations to Create Equivalency in Testing Methods
The CMR is working collaboratively with the Residential/Commercial Buildings group at GTI and a group at Stanford University to develop equivalency testing to be able to properly measure methane emissions from residential natural gas storage water heaters and tankless water heaters, both in the lab and real-world scenarios. Emissions from these components are not currently accounted for in existing U.S. Environmental Protection Agency Greenhouse Gas Inventory calculations.

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