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It's not clear if you're talking about mini-split AC systems with a heat pump or window AC units with resistive heating. If you mean the former, those systems are becoming more popular and are a very efficient way to heat your house, especially if your climate stays within the external temperature range supported by the unit (down to 20 or 30 ºF in older ...


The biggest difference between them is that reversible AC has an extra 4-way valve to reverse the flow. That's not a very fragile component. The seller might be either talking from his personal experience that's particular to one make or series, or he might be simply employing FUD in order to convince you into purchasing item with higher profit margin for ...

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