The answer to 'types of installation' is that there are several common types of HVAC system installations for homes. The most common are central air conditioning systems, furnaces, and heat pumps. Central air conditioning systems are the most popular, with an outdoor compressor/condenser unit connected to indoor air handlers or coils. Furnaces are typically fueled by natural gas, propane, or electricity and provide both heating and cooling. Heat pumps are all-in-one systems that can both heat and cool a home efficiently.
Other less common HVAC installations include ductless mini-split systems, geothermal systems, and packaged units. Ductless mini-splits have an outdoor compressor and one or more indoor air-handling units, ideal for homes without existing ductwork. Geothermal systems use the earth's natural heat to provide heating and cooling, while packaged units combine all components into a single outdoor cabinet.