EPA 608 Type I Study Guide: Small Appliance Recovery, Step by Step

What the EPA 608 Type I section tests

Type I is the 25-question section for small appliances, taken with the 25-question Core. EPA's Test Topics page groups Type I under three headings: recovery requirements, recovery techniques (which also include R-134a as the likely substitute for R-12), and safety, with a single item on the decomposition products refrigerants form at high temperatures. These topics lend themselves to scenarios: a dead compressor, an old recovery machine, a unit headed for the scrap yard.

Everything starts with the definition, because a question that describes a unit that is not a small appliance is really a Type II question.

What counts as a small appliance on the EPA 608 Type I test

40 CFR 82.152 defines a small appliance as one "fully manufactured, charged, and hermetically sealed in a factory with five (5) pounds or less of refrigerant." Both halves matter: factory-sealed, and 5 pounds or less. EPA's examples include household and commercial refrigerators and freezers, room air conditioners (window, portable and packaged terminal heat pumps), dehumidifiers, under-the-counter ice makers, vending machines, drinking water coolers, and medical or industrial research refrigeration.

A ductless split whose line set is connected in the field is not factory-sealed, so it falls under Type II whatever its charge. The EPA 608 certification types guide has more borderline cases.

Two more rules shape Type I questions:

• Some refrigerants are outside Subpart F. Isobutane (R-600a) in household refrigerators and freezers and in stand-alone retail food refrigerators and vending machines, and propane (R-290) in a longer list of end uses that includes household refrigerators and self-contained room air conditioners, are exempt from the venting ban and the rest of Subpart F (40 CFR 82.154(a)(1)). Exempt from EPA's rule is not the same as safe to release: ESCO Institute's 2026 pressure-temperature chart lists R-600a as ASHRAE class A3, a flammable class
• Small appliances must be sold with a process stub, a length of tubing that gives access to the refrigerant and can be resealed after service, unless they contain only exempt refrigerants (40 CFR 82.152 and 82.154(e)(2))

Type I recovery requirements before opening or disposal

Before opening a small appliance or disposing of it, you must recover refrigerant with certified recovery equipment to one of these levels (40 CFR 82.156(b)):

• 80% with recovery equipment made before November 15, 1993, or whenever the appliance's compressor is not working
• 90% with equipment made on or after November 15, 1993 when the compressor works
• Or evacuate to 4 inches of mercury vacuum, whatever the equipment date

The equipment itself must be certified to reach 90% with the test stand's compressor running and 80% with it off, or under the alternatives in the same paragraph to reach a 4-inch vacuum (40 CFR 82.158(e)). The EPA 608 numbers guide lays these out as a table next to the Type II and III levels. Questions mix these conditions on purpose, so an explanation for each miss matters, and the 194 Type I questions planned for full EPA 608 prep come with one for every answer.

Active and passive recovery from small appliances

The definitions in 40 CFR 82.152 split recovery equipment in two. Self-contained equipment removes refrigerant without help from the appliance's components. System-dependent (passive) equipment needs the appliance's own components, such as its compressor, to move the refrigerant into a container.

EPA's Type I topics then add the techniques:

1. Working compressor, passive device: run the appliance's compressor during recovery, so it pushes refrigerant out.
2. Dead compressor, passive device: install access valves on both the high and low sides, and help the refrigerant out. EPA's examples are heating and sharply striking the compressor, or using a vacuum pump with a non-pressurized recovery container.
3. At the end of service: remove solderless access fittings, rather than leaving them on the appliance.

System-dependent equipment has one more limit you may see as a distractor: it cannot be used on appliances with more than 15 pounds of refrigerant unless it is a permanently attached pump-out unit (40 CFR 82.156(e)). A true small appliance never reaches that line, so a question that mentions it is usually testing whether you noticed the charge size.

Identifying the refrigerant and spotting air in a small appliance

EPA lists "use of pressure and temperature to identify refrigerants and detect noncondensables" as a Type I technique. The idea: a refrigerant sitting as liquid and vapor in a closed container holds the saturation pressure a pressure-temperature chart shows for its temperature. A reading well above that suggests something that does not condense, usually air, is in there too. Trane's purge manual for R-123 chillers describes the same effect at a larger scale: noncondensables that collect in a condenser raise its pressure.

Two readings from ESCO Institute's 2026 chart show why the chart helps and where it stops:

• At 70 °F, R-134a reads 71.1 psig. A recovery cylinder of R-134a at 70 °F reading, say, 85 psig is a sign of noncondensables
• At the same 70 °F, R-12 reads 70.1 psig, only 1 psi lower. Pressure alone barely tells those two apart, so check the nameplate and service history before you mix anything into a cylinder

EPA also expects you to know HFC-134a as the likely substitute for CFC-12 in small appliances.

Type I safety: what refrigerants become at high temperatures

EPA's single Type I safety topic is the "decomposition products of refrigerants at high temperatures." Safety data sheets name them. Hudson Technologies' R-22 sheet (revised November 21, 2018) says that above 250 °C (482 °F) decomposition products may include hydrochloric acid, hydrofluoric acid and carbonyl halides, and its R-134a sheet lists hydrofluoric acid and possibly carbonyl fluoride. Both warn that flames, hot spots or welding can produce toxic or corrosive decomposition products.

That is one reason the order of work matters on a small appliance: recover the refrigerant to the required level before you braze or cut, which 40 CFR 82.156(b) requires anyway before opening.

Disposing of small appliances under EPA 608 rules

• Who needs certification. People who only dispose of small appliances do not need to be certified (40 CFR 82.161(a)(1)(vii)), but anyone who services them does
• Recovery before disposal. Whoever recovers refrigerant from a small appliance for disposal must meet the 82.156(b) levels with equipment that meets 82.158 (40 CFR 82.155(a))
• The final processor. Scrap recyclers and landfills, the last step in disposal, must either recover any remaining refrigerant themselves or obtain a signed statement or contract that it was recovered, with the name and address of who did it and the date. If the refrigerant leaked out, they need a signed statement saying so, and they keep these records three years (40 CFR 82.155(b) and (c))

Mail-in and open-book EPA 608 Type I tests

Type I is the only section a program may offer as a mail-in test, and it needs 84% instead of 70%. A mail-in Type I, or an open-book Core taken with it, cannot count toward Universal. The EPA 608 open-book and online rules guide explains what each format allows, so you can decide before you pay whether a quick Type I will cost you a second Core later. If you take the closed-book route, the Type I flashcards planned for the EPA 608 launch are sorted by test like the rest of the deck.

Two Passy practice questions for EPA 608 Type I

These are original Passy questions, not EPA items.

1. A dorm refrigerator with a seized compressor still holds its R-134a charge. The technician's recovery equipment was made in 2015 and is a system-dependent device. What should the technician do?

• A. Install access valves on both the high and low sides, then recover at least 80%
• B. Install a single low-side access valve, then recover at least 90% of the charge
• C. Release the charge, since a seized compressor makes recovery impossible here
• D. Run the compressor anyway, so the passive device can still reach 90% recovery

Answer: A. With an inoperative compressor, EPA's topics call for access valves on both sides, and 40 CFR 82.156(b)(2) sets 80% when the compressor is not functioning, even with post-1993 equipment. Evacuating to 4 inches of mercury vacuum would also satisfy the rule. Venting is prohibited (C), and a seized compressor cannot be run (D).

2. A recovery cylinder used only for R-134a has been sitting at 70 °F and reads 85 psig. ESCO's 2026 chart shows 71.1 psig for R-134a at 70 °F. What does the reading most likely mean?

• A. Noncondensables, most likely air, are in the cylinder with the R-134a
• B. The cylinder actually holds R-12, which reads higher at the same temperature
• C. The cylinder is under 80% full, so the pressure has risen to compensate
• D. The reading is normal, because R-134a cylinders always read above the chart

Answer: A. A pressure well above the chart value at a known temperature points to noncondensables. R-12 reads lower, not higher, at 70 °F on the same chart (70.1 psig), so B fails, and the amount of liquid in the cylinder does not change the saturation pressure the chart shows (C).

Studying Type I alongside the Core

Type I is short, and it always comes paired with Core. Learn the small-appliance definition and the 80/90/4 rule until you can apply them to a scenario, then practice the recovery steps in order. The EPA 608 Core study guide covers the shared material, such as the three R's and cylinder safety, and the free EPA 608 practice questions include five Type I items with explanations. If you plan to mix sections in one session, you will be able to practice Type I and Core together in planned EPA 608 prep once checkout opens. The free EPA 608 study plan can give Type I its own days in the meantime.