Manual J is the industry standard calculation method used to determine the heating and cooling load requirements for single-family homes and similar small buildings; it accounts for climate, building orientation, insulation levels, window types and sizes, air infiltration, internal heat gains, and duct losses to produce accurate size recommendations for furnaces, air conditioners, and heat pumps. By using detailed inputs—such as local design temperatures, construction materials, occupancy, and equipment efficiencies—Manual J provides a room-by-room analysis that prevents oversizing or undersizing HVAC equipment, improves comfort, reduces energy use, and extends equipment life. Proper Manual J sizing is essential for selecting the right equipment capacity, designing balanced duct systems, and meeting energy codes and efficiency programs.
Half-Day Technical Session | Outdoor & Indoor Units
Install, start-up, and troubleshooting — covered in that order, with live equipment demonstrations throughout. You'll get the checkpoints that keep a system out of trouble from start-up, then spend the rest of the time on where techs get stuck: refrigerant circuit diagnostics, electrical and control faults, error code interpretation, and wiring issues across indoor and outdoor units.
You'll Walk Away Knowing:
• Install and start-up checkpoints specific to ductless systems
• How to read and interpret error/fault codes fast — no more guessing
• Refrigerant circuit diagnostics on single and multi-zone ductless equipment
• Electrical and control fault troubleshooting, indoor and outdoor
• Wiring diagnostics across the ductless line
Part of WTU's fall training series — heat pumps, ductless, and communicating systems.
Half-Day Technical Session | Outdoor & Indoor Units
Install, start-up, and troubleshooting — covered in that order, with live equipment demonstrations throughout. You'll get the checkpoints that keep a system out of trouble from start-up, then spend the rest of the time on where techs get stuck: refrigerant circuit diagnostics, electrical and control faults, error code interpretation, and wiring issues across indoor and outdoor units.
You'll Walk Away Knowing:
• Install and start-up checkpoints specific to ductless systems
• How to read and interpret error/fault codes fast — no more guessing
• Refrigerant circuit diagnostics on single and multi-zone ductless equipment
• Electrical and control fault troubleshooting, indoor and outdoor
• Wiring diagnostics across the ductless line
Part of WTU's fall training series — heat pumps, ductless, and communicating systems.
Install, start-up, and troubleshooting — covered in that order, with live equipment demonstrations throughout. You'll get the checkpoints that keep a system out of trouble from start-up, then spend the rest of the time on where techs actually get stuck: communication faults, system setup and configuration, and the meters and tools that make diagnosing these systems faster — systems that don't troubleshoot like the conventional equipment you're used to.
You'll Walk Away Knowing:
• How to read communication faults fast — no more guessing
• System commissioning sequence and service menu navigation
• Which meters and tools actually make this job easier, and how to use them
• What breaks a communicating system that wouldn't break a conventional one
• How to tell a wiring fault from a control board fault before you start swapping parts
Part of WTU's fall training series — heat pumps, ductless, and communicating systems.
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