1 You are adding or replacing a split-system heat pump or central air conditioner.  An evaporator coil is the part of a heat pump or air conditioning system that becomes cold when the unit operates (or warm for a heat pump in winter). It is mounted in (or connected inline with) the ductwork of the home.
Sociology is the study of human social behavior and human association and results of social activity (study of group interaction, culture, etc. and all that they entail). Criminology is the study of crime as an individual and social phenomenon and is often viewed in context of social institutions.
So, one can say that Marxism and Socialism are two kinds of systems that are to be understood as different when it comes to their concepts and ideologies. Marxism is more theoretical in nature whereas Socialism is more practical in nature. This is one of the main differences between Marxism and Socialism.