There are a couple of different types of package units to choose from. Package air conditioners, package heat pumps, package gas-electric units, and packaged dual-fuel units are all available. Let’s look at each in more detail.Package air conditioners-These are the air conditioning units. However, some do include an electric heating strip to provide some heat.Package heat pumps-Heat pumps can both cool and heat your home. They use airflow to complete both tasks. Package gas-electric units-This type of package unit pairs an electric air conditioner with a gas furnace. Package dual-fuel units-Package dual-fuel systems combine a heat pump and a gas furnace. This type of package unit is best in areas that require a lot of heating.