For years I have wondered where the best location for an air handler is. When I was growing up as a young child in a northern state, it was unheard of to find an air handler installed in someone’s connected garage. But where I live now, that’s the common in all new homes being built. Surely there’s a practicality standpoint over the ease of installing the unit so close to where the actual outside condenser will be located, making repairs easier & requiring less materials & shorter pipes for the refrigerant lines. Regardless, the major issue right away with putting an air handler in an connected garage is energy efficiency. Garages are rarely conditioned spaces & are full of outdoor heat in an environment like mine. Any leaks on the outside of the air handler, however tiny they may be, will all let in air from your garage. If your garage is warm enough, this is a notable section of energy loss. But on the same token, when dealing with the topic of leaks, the more important problem isn’t even energy loss, however straight up poisoning. Garages are some the dirtiest environments in a beach home & often contain paint, solvents, gasoline, oil, & other chemicals that release harmful VOCs into the air. On top of these, you’re also dealing with the carbon monoxide from your automobile fumes, which will actually expose your air handler whenever you park in your garage & first power down the car, leaving some fumes trapped in the small space & slowly leaking into your indoor air. For all of these reasons & more, it’s smart to find a location inside the beach home rather than using an connected garage to home your Heating & Air Conditioning air handler.