The word "LOGOS" in the Greek language may be translated to English to mean alternatively "thought" or "logic". The term "LOGOS" has no specialized meaning in and is completely arbitrary with respect to the heating, ventilation and air conditioning industry. The term "LOGOS" has no specialized meaning in and is completely arbitrary with respect to the desig or construction of heating, ventilation and air conditioning systems, or to persons who design, construct, operate, maintain or use systems.