CO2 can be used as a refrigerant with GWP=1 (most are like 10s to >150x CO2)
How much volume would you have to air condition/refrigerate for hvac itself to be a meaningful sequestration medium?
Though replacing HFCs etc would be the biggest effect ofc
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Annual refrigerant consumption is ~10⁷ lb
Annual CO₂ emissions are ~7x10¹³ lb
If HVAC demand grew by a factor of a million while emissions remained constant, refrigerant demand would become meaningful.
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“systems are typically designed to withstand pressures up to 90 bar”
That is 1300 psi. Not something your average plumber is used to dealing with.
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