FAQs > Rule Subparts > Subpart OO. Suppliers of Industrial Greenhouse Gases > Q287. How does one handle the calculation of blends such as R-410A? Do we calculate on the basis of the components, e.g., HFC-125 and HFC-32?

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## Q287. How does one handle the calculation of blends such as R-410A? Do we calculate on the basis of the components, e.g., HFC-125 and HFC-32?

A287. Yes, you calculate the CO2 equivalent of an HFC blend by breaking out the mass of the blend into the masses of its component HFCs, converting the mass of each of those HFCs into CO2 equivalents, and then adding together the CO2 equivalents of all components.

For example, if you imported 20 metric tons of R-410A (composed of 50% HFC-125 and 50% HFC-32 by weight), you would break out the 20 metric tons into 10 metric tons of HFC-125 and 10 metric tons of HFC-32. You would then convert each of those masses into CO2 equivalents: 35,000 metric tons CO2e for the 10 metric tons of HFC-125 and 6,750 metric tons CO2e for the 10 metric tons of HFC-32. You would then add these together to get the CO2 equivalents of the blend: 41,750 metric tons CO2e in this example.

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{show-to:group=confluence-Users} {info} Source: This question and answer was derived from a Legacy FAQ Approval / Publishing History: Version 2, revised 12082014 per Lisa GM Expiration : none Relevant Subparts: Subpart OO, QQ and L {info}{_}History Panel For Internal Use - Not Visible to the Public{_}{show-to}
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Source: This question and answer was derived from a Legacy FAQ.

Approval / Publishing History: Version 2, revised 12082014 per Lisa GM.

Expiration : None

Relevant Subparts: Subpart OO, QQ, and L.

History Panel For Internal Use - Not Visible to the Public