Assuring guest house comfort for overnight visitors is entirely possible during the summer months by using your current HVAC system or using smaller, room-sized equipment. Today’s cooling products are energy efficient, easy to install and effective and designed for multiple situations. The easiest and most energy efficient way to cool a separate guest house is with a ductless mini split heat pump. Mini splits don’t require any ductwork, leaving more livable square footage, are simple to install, and provide exceptional cooling and heating efficiency. If the guest house is small, consider cooling it with a wall, window, or portable air conditioner. Some homes in the area have separate guest suites as part of the home’s footprint. Options for guest house comfort include all the options for standalone structures, or you can extend the existing system or install a zoning system. If the guest area in your home isn’t serviced by your current HVAC system, your contractor can determine if it has enough capacity to cool the guest area. Zoning your home involves dividing it into separate areas and putting each one on its own thermostat. A zoning system lets everyone select their preferred temperatures for maximum comfort. You can also shut the entire guest suite off when it’s not in use, which saves energy.