EPA 608 Type I Study Guide

Written by an EPA 608 certified technician · Reviewed July 22, 2026 · About the author

Type I certification covers small appliances. It is often the first certification HVAC students earn, and it is the section that applies to the refrigeration equipment most people have in their own homes. Type I questions are very practical: they want to know whether you can correctly identify a small appliance, choose the right recovery method, and get the refrigerant out before the unit is repaired or scrapped.

This guide assumes you have already worked through the Core study guide. Type I builds directly on Core, and the two are tested together on the way to certification.

What Counts as a Small Appliance

On the exam, a "small appliance" has a specific meaning. It is a product that is fully manufactured, charged, and hermetically sealed in a factory, and that contains five pounds or less of refrigerant. The key idea is that the system is sealed at the factory — the technician does not normally open it during routine use.

Common examples include household refrigerators and freezers, room air conditioners (window units), packaged terminal air conditioners and heat pumps, dehumidifiers, water coolers, and vending machines. If a question describes a large split system that was charged on site by an installer, that is not a small appliance — that points toward Type II. Reading the appliance description carefully is half the battle on Type I.

Two Kinds of Recovery Equipment

Type I questions lean heavily on the difference between two recovery approaches:

The 80 / 90 Percent Recovery Rule

This is the single most-tested Type I fact, so commit it to memory. When recovering from a small appliance with system-dependent equipment manufactured on or after the regulatory cutoff date:

• You must recover 90 percent of the refrigerant when the appliance compressor is operating.
• You must recover 80 percent of the refrigerant when the appliance compressor is not operating.

The logic is straightforward: a working compressor actively helps push refrigerant out, so a higher recovery percentage is expected. A dead compressor makes recovery harder, so the requirement drops to 80 percent. When a Type I question gives you the compressor status, that detail is almost always the key to the answer.

Use the interactive 80/90 decision visual to practice both clues without guessing.

Accessing the System

Most small appliances do not come with service valves, so technicians install an access fitting to connect recovery equipment. A common choice is a saddle or piercing-type access valve clamped onto the tubing. Be careful with these: piercing valves can leak over time, which is why many technicians remove them after service or replace them with a brazed fitting. Recovering from both the high and low sides of the system speeds up recovery and helps you reach the required percentage, especially when the compressor is not running.

Recovery During Disposal

A large share of Type I work is disposal-related — recovering refrigerant from refrigerators, freezers, and window units that are headed for the scrap yard. The rule to remember: refrigerant must be recovered before the appliance is discarded, and the last person in the disposal chain is responsible for verifying that recovery happened. Scrap dealers and recyclers often require a signed statement confirming the refrigerant was removed by a certified technician. If a question describes a unit going to a landfill or scrap metal recycler, recovery comes first — always.

Safety and Cylinder Reminders

The Core safety rules still apply on Type I. Recovered refrigerant goes into a proper recovery cylinder, never a disposable one, and you never fill past 80 percent of capacity to leave room for liquid expansion. Do not mix refrigerants in one cylinder. Wear eye and hand protection — liquid refrigerant causes frostbite — and never apply heat or flame to a cylinder or a charged system. Even though small appliances hold only a small charge, the safety practices do not change.

How to Study Type I

Run Type I study mode until the small-appliance definition and the recovery equipment types feel automatic. Then switch to smart practice so the app concentrates on your weak spots. When you miss a recovery question, go back and check two things: what type of recovery equipment was described, and whether the compressor was operating. Those two details drive most Type I answers.

When Type I study mode feels comfortable, take a Type I practice exam for a test-style score, then use Review Missed to clean up the last few weak questions before moving on.

Next Steps

After Type I, continue with the Type II guide for high-pressure appliances and the Type III guide for low-pressure appliances. To pursue Universal certification, you will need all three plus Core — see the exam overview for how the sections fit together.

Not affiliated with the EPA. For study practice only. EPA regulations change over time — always verify current rules with official EPA materials and your testing provider.