Everything You Need In One Cabinet. Packaged unit heating and air conditioning systems contain the same components you find in a typical split system, however, they’re all engineered to work together in one cabinet. And, just like other Trane systems, you have a variety of efficiency levels and air handling options to select from. Takea look at our family of packaged units below. Our brief feature descriptions will help you find the packaged unit that best fits your comfort needs.