Depending on where you live, most houses could be built with central heating and thermostats in mind or not. Even in houses that have a fully ducted system, getting a small expansion done like a bigger garage, an additional room, or a guest house could require you start looking at other options for heating and cooling. Ductless systems, whether they're split air conditioner units, window ACs, portable or floor standing units, or heat pumps, are the go-to solution then. But in a world that's more connected than ever, they present one main disadvantage compared to thermostats: they can't be easily retrofitted for automation and smartphone control.

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