What is the definition of a mini split with gas heat? A mini split with gas heat is an air conditioning system that uses a combination of an outdoor compressor and indoor evaporator units to provide cooling or heating to a space. The system is comprised of two main components: an indoor evaporator, and an outdoor compressor. The evaporator is the part of the system that circulates air through the space and absorbs heat energy. The compressor is the part of the system that compresses and pumps the refrigerant to the evaporator. The gas heat component of the system is added to the evaporator and uses gas as a source of energy to produce additional heat. This type of heating system is ideal for homes and businesses that don’t have access to a gas line but need to warm their space. This type of mini split system is typically more efficient than traditional heating systems, and can save a lot of energy. It is also one of the most cost effective ways to provide heating and cooling