heater check ups

December 15, 2016

History of Heat

Unlike cool air produced by air conditioners, warmth is essential to human survival. For this reason, man originally gathered near the equator and areas that were warm most of the year. However, man is a curious creature and moved outward both north and south to areas that simply were not warm enough for survival without some form of heat. To begin with, this was simply fire. It is thought that man learned to control fire for cooking and heating nearly 2 million years ago; however, evidence of controlled fire only dates back 100,000 year. These include central fires in enclosed […]