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How to properly size air filters​​

A2L Refrigerants (Mildly Flammable)

Section 608 of the Federal Clean Air Act Study Guide and Practice Test

NRI’s Refrigerant Reference Guide, 6th Edition, contains the latest information on R-22 alternatives, the 2010 EPA regulations, as well as all of the standard technical data on refrigerants, refrigerant blend behavior tutorial, retrofit procedures, and NRI products and services information that our Reference Guide is famous for.

The indoor fan is a critical component in every forced-air, space-conditioning system. The fan is the principal means for delivering conditioned air to a space, and therefore the effectiveness of the fan has a direct impact on system efficiency, perceived comfort level, and air quality in the space. There are a variety of fan types and arrangements, each with unique operating properties that lend themselves to particular applications and design requirements.

When it comes to finding leaks, having a firm grasp of gas laws (and accurate gauges) can help technicians get the job done faster and ensure a tight system.

Quite often, when you encounter a problem with a piece of HVAC/R equipment, the problem turns out to be electrical in nature. If you have a clear understanding of how to read wiring diagrams, you frequently can find the source of the trouble simply by checking the wiring of the unit itself against the manufacturer’s wiring diagram.

The latest IMC requires economizers on all air handlers and packaged units 3 ton and over in commercial applications. These aren't just for PRTUs anymore.

These babies don't come with literature so keep this course bookmarked!

Study guide for the Air Conditioning NATE module

Study guide for the Air Conditioning NATE module

​Study guide for the Core NATE module

Study guide for the Gas Air Heat NATE module

Study guide for the Heat Pump NATE module

Electrical Basic Concepts - RSES NATE Prep. Volts, Amps, Ohms, ohms law, watts law, series and parallel circuits.

Common types of sensors used in JK Mechanical Building Automation Systems

User files for EasyIO Building Automation Systems

Equipment task lists for Commercial Service Planned Maintenances

Information on Sporlan Thermostatic Expansion Valves

24SCA4, 24SCA5 Comfort Series™ Air Conditioner with Puron® Refrigerant 1.5 to 5 Nominal Tons

AC / HP Puron Refrigerant Systems, Single- Stage, Two- Stage and Variable Speed Models