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R-22 Phase-out: A Guide To A/C Freon Replacement in 2020 by Crystal
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Air conditioning refrigerant phase out: What business owners need to know - Albuquerque Business First
R22 Freon Production Ban Timeline 2016 | Austin Air Companie
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The Future of Air Conditioning – New rules, New equipment | Burkholders
The R-22 Phaseout: We've Got it Covered
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