A split HVAC system is an air conditioning system or heating system that has both indoor and outdoor units that are connected with copper tubing. Traditionally, the outdoor portion of the unit contains the compressor and condenser, and the indoor portion of the unit contains an evaporator coil...
Jewelers often use heat torches tometals such as copper, sterling silver, and gold. Flameless heat guns are sometimes used in these applications, though a heat torch with a visible flame is commonly chosen instead. The type of heat torches that are used in lapidary applications are usually fuel...