The Wave 3 is more powerful than its predecessor, which means it can cool and heat larger spaces than the Wave 2 I reviewed last summer. But that 6100BTU (1800W) of cooling and 6800BTU (2000W) of heating means we’re still talking small RVs, tents, boats, and maybe a tiny bedroom from a device that still punches well above its literal weight. The intake and exhaust hoses are now insulated, which should make this heat pump even more efficient than before, and water drainage has also been…