NATE Heat Pump Install study guide
NATE Heat Pump Install · Work through your exam, one topic at a time.
The NATE Heat Pump Installation certification is a specialty credential for technicians who install air-source heat pumps, including split and packaged systems in residential and light commercial work. It signals that a technician can take a job from site survey through commissioning: matching equipment to a load calculation, running and brazing refrigerant lines, evacuating and charging to weight or subcooling/superheat targets, setting airflow, wiring low-voltage controls, and verifying performance before handing the system to the homeowner. The NATE Heat Pump Install study guide has 9 sections and about 2,847 words.
01Heat Pump Fundamentals, Refrigerant Cycle, and System Components
This domain tests how a heat pump moves heat rather than creating it, how the vapor-compression cycle changes between heating and cooling, and what each major component does. Expect questions on reversing-valve operation, defrost, balance point, and why capacity falls as outdoor temperature drops.
340 words, about 2 min02Site Survey, Load Calculation, and Equipment Selection
This domain tests whether you can survey a site, calculate a room-by-room load, and select equipment that matches both sensible and latent loads. The exam emphasizes Manual J, Manual S, and Manual D logic, design conditions, envelope details, and matched-system requirements.
326 words, about 2 min03Electrical Power, Controls, and Low-Voltage Wiring
This domain tests high-voltage power wiring, overcurrent protection, disconnects, and low-voltage control wiring for heat pumps. Expect questions on nameplate MCA and MOP, thermostat terminals, reversing-valve logic, defrost controls, and lockout settings.
333 words, about 2 min04Refrigerant Piping, Brazing, Evacuation, and Charging
This domain tests line sizing, brazing practice, evacuation, leak testing, and charging. The exam focuses on preventing moisture and oxidation, achieving a deep vacuum, and using subcooling or superheat correctly for the metering device and operating mode.
298 words, about 1 min05Airflow, Duct Design, and Indoor Unit Installation
This domain tests airflow measurement, duct design, and indoor unit installation. Expect questions on total external static pressure, fan curves, cfm per ton, sensible heat equation, drain traps, and proper coil and plenum installation.
341 words, about 2 min06Outdoor Unit Placement, Mounting, and Defrost/Drainage
This domain tests outdoor unit location, clearances, mounting, vibration control, and defrost water management. Expect questions on recirculation, snow and ice, service access, and how placement affects defrost and drainage.
306 words, about 2 min07Start-Up, Commissioning, and Performance Verification
This domain tests pre-start checks, commissioning measurements, and performance verification. Expect questions on evacuation, charging, airflow, temperature split, electrical readings, auxiliary heat, defrost testing, and documentation.
290 words, about 1 min08Troubleshooting, Service, and Maintenance
This domain tests symptom-based diagnosis, electrical and refrigerant troubleshooting, and maintenance. Expect questions that link a complaint such as “not heating” or “iced coil” to airflow, charge, reversing valve, defrost, or electrical causes.
326 words, about 2 min09Safety, Codes, and Environmental Regulations
This domain tests refrigerant handling, environmental rules, electrical safety, brazing safety, and code compliance. Expect questions on EPA Section 608 recovery and leak-repair requirements, A2L refrigerants, lockout/tagout, and mechanical code clearances.
287 words, about 1 min