View Full Version : Anyone used 421A drop in?
06-28-2009, 03:10 AM
Just saw an ad in an HVAC mag, advertising 421A Drop in for R-22, says its ASHRAE deignated, has no butane, propane or anything in it.
Has anyone used it, What were the results?
06-28-2009, 03:31 AM
hmm. I wouldn't know but grainger or the local hvac supplier might?
06-28-2009, 11:36 AM
It has a higher GWP then R22.
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