HVAC Course

Lesson 1 • Tools and Test Instruments

Identifies hand tools, power tools, and diagnostic instruments used daily in HVAC work. Proper tool selection and care directly affect job quality and technician safety.

Lesson 2 • Introduction to HVAC Systems

Covers the purpose, history, and scope of HVAC as a trade. Provides context for all subsequent technical content by defining what HVAC systems do and where they are used.

Lesson 3 • Workplace Safety Fundamentals

Teaches hazard recognition, personal protective equipment selection, and lockout/tagout procedures. Safety compliance is a prerequisite for all hands-on lab and field activities.

Lesson 4 • Core Trade Terminology and Symbols

Introduces standardised vocabulary and schematic symbols used across HVAC documentation. Accurate terminology use is essential for reading blueprints and communicating with engineers.

Lesson 1 • Refrigeration Cycle Fundamentals

Traces the vapour-compression cycle through each component and state change. Mastery of this cycle is the theoretical basis for all refrigerant system service tasks.

Lesson 2 • Psychrometrics and Air Properties

Teaches dry-bulb, wet-bulb, dew point, and relative humidity relationships using psychrometric charts. These values drive equipment sizing and indoor air quality decisions.

Lesson 3 • Modes of Heat Transfer

Distinguishes conduction, convection, and radiation and quantifies each in building contexts. Technicians use this knowledge to diagnose comfort complaints and insulation failures.

Lesson 4 • Basic Thermodynamic Laws

Explains the laws of thermodynamics as they apply to heating and cooling equipment. Understanding energy conservation and entropy guides correct system design decisions.

Lesson 1 • Compressor Types and Operation

Compares reciprocating, scroll, rotary, and screw compressors by design and application. Compressor selection and diagnosis are central to refrigeration system service.

Lesson 2 • Metering Devices and Expansion

Explains TXVs, EEVs, fixed orifices, and capillary tubes and their effect on system superheat. Proper metering device adjustment is critical for system efficiency and compressor protection.

Lesson 3 • Refrigerant System Charging and Recovery

Demonstrates proper procedures for evacuating, charging, and recovering refrigerant from systems. Correct charging directly determines system efficiency and equipment longevity.

Lesson 4 • Refrigerant Classification and Properties

Categorises refrigerants by chemical family, GWP, and ODP and explains phase-out timelines. Correct refrigerant selection is required for regulatory compliance and system performance.

Lesson 1 • Electrical Troubleshooting Methods

Applies voltage, resistance, and current measurements to isolate electrical faults systematically. Structured electrical troubleshooting reduces diagnostic time and prevents misdiagnosis.

Lesson 2 • HVAC Electrical Components

Identifies contactors, relays, capacitors, transformers, and motors used in HVAC equipment. Component identification and testing are required before any electrical repair can be completed.

Lesson 3 • Control Circuits and Sequencing

Explains ladder diagrams, control circuit logic, and equipment sequencing for HVAC systems. Control circuit mastery enables technicians to trace faults without replacing functional components.

Lesson 4 • Wiring HVAC Equipment

Covers line-voltage and low-voltage wiring, conduit installation, and code-compliant connections. Correct wiring prevents equipment damage, nuisance trips, and electrical hazards.

Lesson 1 • Hydronic Heating Systems

Explains boilers, circulators, expansion tanks, and terminal units in hot-water heating systems. Hydronic systems are common in commercial buildings and require distinct service skills.

Lesson 2 • Gas Furnace Components and Operation

Identifies burners, heat exchangers, draft systems, and controls in gas furnaces. Component knowledge is the foundation for safe installation and accurate fault diagnosis.

Lesson 3 • Gas Furnace Installation

Covers venting, gas piping, combustion air, and electrical connections for furnace installation. Correct installation ensures safe operation and compliance with manufacturer specifications.

Lesson 4 • Heating System Diagnostics

Applies systematic troubleshooting to no-heat, short-cycling, and efficiency complaints. Structured diagnostic methods reduce callback rates and improve first-call resolution.

Lesson 1 • Split System Components and Design

Identifies indoor and outdoor unit components and explains airflow and refrigerant circuit paths. System design knowledge enables correct equipment selection and installation planning.

Lesson 2 • Packaged and Rooftop Units

Explains self-contained packaged equipment used in commercial applications and rooftop installations. Rooftop units require unique rigging, curb mounting, and ductwork connection skills.

Lesson 3 • Ductless Mini-Split Systems

Covers single-zone and multi-zone mini-split installation, commissioning, and service. Mini-splits are the fastest-growing segment of the residential and light-commercial market.

Lesson 4 • Air Conditioning System Diagnostics

Applies pressure-temperature analysis, airflow measurement, and electrical testing to AC faults. Systematic diagnosis reduces unnecessary part replacement and improves repair accuracy.

Lesson 1 • Ventilation Standards and Equipment

Applies minimum ventilation rate requirements and explains ERV, HRV, and exhaust fan systems. Adequate ventilation is required for occupant health and regulatory compliance.

Lesson 2 • Indoor Air Quality Control

Covers filtration ratings, UV germicidal systems, humidification, and dehumidification equipment. IAQ solutions are increasingly required by building owners and health-conscious occupants.

Lesson 3 • Duct System Design Principles

Teaches equal friction and static regain duct design methods for residential and commercial systems. Proper duct design ensures adequate airflow to every zone without excessive energy use.

Lesson 4 • Air Distribution Devices and Balancing

Identifies supply, return, and exhaust grilles, registers, and diffusers and explains airflow balancing. Balanced airflow eliminates hot and cold spots and reduces occupant comfort complaints.

Lesson 1 • Service Call Management

Develops skills for diagnosing, quoting, and completing service calls efficiently and professionally. Effective service call management increases revenue per call and customer satisfaction.

Lesson 2 • Preventive Maintenance Programmes

Designs seasonal maintenance tasks for heating, cooling, and ventilation equipment. Structured PM programmes extend equipment life and reduce emergency service calls.

Lesson 3 • System Commissioning Procedures

Covers startup checklists, performance verification, and documentation for new HVAC installations. Thorough commissioning confirms design intent is met and protects warranty coverage.

Lesson 4 • Technical Report Writing

Teaches clear documentation of findings, recommendations, and completed work in service reports. Accurate reports protect technicians legally and support warranty and insurance claims.