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Personally, I would shotgun replace any system still running on R22 with newer technology...for the energy savings alone. I've had my inverter-based R-410A heat pump for a year now, and even ran it all of last winter (except one frigid arctic blast week week) because it was costing us half of what our Energy Star-rated baseboard hot water oil boiler would use.....
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2015 BMW i3 BEV, Giga World (Lodge interior), Tech/Driving Assist Packages, 30K miles
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