Given the large impact from venting to the atmosphere, it's almost certainly better from a carbon impact standpoint to ship it: Every time he does this with a

Given the large impact from venting to the atmosphere, it's almost certainly better from a carbon impact standpoint to ship it: Every time he does this with a single air conditioner, it has the same effect as burning 250 gallons of gasoline, which is more than enough to drive from SF to NY and back It surely doesn't consume 250 gallons of gasoline equivalent to ship the collected gas.