Tech 4 - Lab • Gas Furnace operations• Gas furnace Diagnostics• Central Unit Disassembly• Central Unit Reassembly• Preventive Maintenance• Manual J Load Calculations• Metal Bending and Transition Building• Soldering, Brazing, Pro Press, and Pipe fitting Class Schedule This course begins immediately after Tech 3 Check our calendar and Social media for available spots.8 weeks – Weekly on Monday 4 weeks – Bi-weekly on Tuesday & Thursday