HPAC 2022: Our Eighth Quiz of the Year!!

This month's quiz focuses on refrigerants and the urgent changes that are now upon us. Our industry has less than 18 months to start making the shift from HFCs to A2Ls. Will your facilities be ready?
Photo credit: © Ryzhov Sergey | Dreamstime.com
1. The cover story of HPAC Engineering’s July/August 2022 issue details our industry’s upcoming deadline to comply with the 2024 International Building Code, which will mandate a significant phasedown in the production of hydrofluorocarbons (HFCs) by the start of 2024, according to a new EPA rule. By what percentage must HFC production be reduced by the end of 2023?

A. 20%

B. 30%

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D. 50%
Source: U.S. Environmental Protection Agency
2. To fill the void left by HFCs with refrigerants that have lower Global Warming Potential (GWP), EPA last year adopted a final rule that allows for six alternatives, classified as A2Ls, for use in new residential and light commercial air conditioners and heat pumps. Which of the following is not one of those six?
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B. R-32

C. R-452B

D. R-457A

Source: U.S. Environmental Protection Agency
3. The 2024 IBC will also limit the amount of A2L refrigerants that can be used within air-conditioning systems for human comfort. The limited maximum capacity of such refrigerants for residential use is 6.6 lbs. What is the maximum capacity permitted for commercial use?

A. 12.2 lbs

B. 16.8 lbs
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D. 28.8 lbs
Source: International Code Council
4. HFCs, themselves, were developed as a greener alternative after the 1987 Montreal Protocol called for a global phasedown in the production of chlorofluorocarbons (CFCs) which were found to be depleting the Earth’s ozone layer. But HFCs have since been found to be potent greenhouse gases with elevated GWP levels. So, they now are being phased out as part of which international agreement?

A. Helinski Protocol

B. Paris Accords
C. Vancouver Agreement
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Source: International Code Council
5. Despite their lower GWP potential, A2Ls had previously not been approved for human comfort use in the U.S. because of concerns over flammability. However, new industry testing by AHRI and Underwriters Laboratories (UL) subsequently allayed those fears. As a result, A2Ls were approved for domestic use, starting in which year?
A. 2022
B. 2023
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D. 2025

Source: International Code Council