Those results helped our decision to go big and not focus too much on the claimed square-footage requirements. Our tests have borne this out over the years, as well we’ve seen supposedly efficient models that barely made a dent in cooling rooms they were appropriately sized for. Portable ACs are notorious underperformers, generally less efficient than their window-mounted counterparts, and we’ve frequently heard that people buy a smaller unit, find it unsatisfying, and either return it or swap it out for a larger one. But we were more concerned about making recommendations that could actually provide adequate power. The main risk of using an oversize AC is overcooling the area before dehumidifying it, and all of these units have dehumidifier functions that can remove moisture without chilling the space if a room gets too cold and clammy. We weren’t worried about oversizing the AC for the space, either. The Midea offers all of the standard smart-home capabilities, as well, including Amazon Alexa and Google Assistant support, and the smartphone app and the included remote offer even greater options for custom control. It’s one of the quietest portable ACs we’ve ever tested, too, with a volume that consistently measured below normal conversation levels. Unlike the single-hose portables we typically recommend, the Duo has a unique “hose-in-hose” setup where the exhaust and intake are split into two separate conduits contained within a single larger tube, making it even more efficient.
In our tests, it was also remarkably effective at distributing the cool air, never leaving more than a 1-degree temperature difference across the room.
Rather than running only at max speed or nothing, the Midea’s inverter-powered compressor can operate at a continuously variable speed, so the unit has a lot more flexibility in how it reaches a desired temperature in a wide range of temperature and humidity conditions.
Most portable ACs are pretty similar, but the Midea Duo MAP12S1TBL delivers better cooling performance than other models while using less energy and making less noise.
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