When installing and repairing refrigeration equipment, technicians should always follow good service practices to prevent any contaminants from entering the piping or system components.
The economy might be on shaky ground right now, but HVAC contractors can come out the other side by not panicking, being deliberate, and taking advantage of the opportunities that are there.
Copper was the mainstay in HVAC and refrigeration coils until 2011, when copper prices went through the roof. As manufacturers began testing alternatives, the industry settled on aluminum as a workable, less costly option.