Not everyone is aware of how the world came to be.
There have been many developments in human history that have led us to the state of affairs today, affecting our culture, lifestyles, and even our HVAC systems.
Nestled historically between the Stone Age and Iron Age, realistically it would have been called the “Copper Age” if not for the use of Tin. The Copper-Tin alloy proved to be more useful in the end than the component metals and thus the Bronze Era came to be, instead, around 3000 BCE. Copper has been a highly decorative and functional metal ever since. It is entirely easy to work with, ductile (easily formed into any shape) and highly conductive to all energy making it a key element in electronics, wire, plumbing. At one point it was the favorite metal in AC coils. Our other metal we use for AC units is Aluminum. Throughout most of history, it was nothing more than a silly curiosity. Copper could be mined directly from the earth in large amounts, however around 1889, an Austrian chemist named Karl Joseph Bayer invented a way to extract loads of Aluminum from bauxite ore with a cheap and feasible process. Now, there is no doubt that the better choice of metals for the application of Heating, Ventilation & A/C cooling tubes is copper. It conducts energy better than aluminum; it is extremely durable and easier to repair, especially compared to its silvery colored rival. The concern with copper is its going price as a “semi-precious” metal that has forced Heating, Ventilation & A/C manufacturers in recent decades to turn to the much less extravagant and available aluminum. For all the people, the extra “effort” that the Heating, Ventilation & A/C component does to easily move the heat from your kitchen to outside is barely noticeable each month when the electric bill arrives.