• SkillCat Team

Ozone Depleting Refrigerants

Updated: 7 days ago

EPA 608 Core Chapter 16 (Take full course for free)


In this module, we will discuss the first two types of refrigerants -- CFCs and HCFCs. Skip to quiz!


1. Categories of Refrigerants

There are five major categories of pure refrigerants that we will cover for the EPA exam:

- CFCs

- HCFCs

- HFCs

- HFOs

- Natural refrigerants

In this module, we will discuss the first two -- CFCs and HCFCs.




2. CFC Refrigerants


CFCs are a category of refrigerants called chlorofluorocarbons. R-11 and R-12 are examples of CFC refrigerants.


CFCs are made of:

- Chlorine

- Fluorine

- Carbon


3. HCFC Refrigerants


HCFCs are made of:

- Hydrogen

- Chlorine

- Fluorine

- Carbon


HCFCs are a category of refrigerants called hydrochlorofluorocarbons. R-22, R-123, and R-124 are examples of HCFC refrigerants.


HCFCs were developed as a transitional alternative to CFCs. Although not as harmful as CFCs, HCFCs still have chlorine so they still destroy ozone in the atmosphere.


HCFCs have mostly been phased out in developed countries. This means that it is illegal to have new production or import of HCFCs. But HCFCs are still used in existing refrigeration equipment. The most common of HCFCs we still see today is R-22. This is seen in servicing systems that still operate on R-22.


4. Conclusion


In this module, we discussed the historic use of different refrigerants and certain refrigerants (CFCs and HCFCs) were harmful to the ozone layer. In response to this, new refrigerants were developed that do not contain chlorine. Because they do not contain chlorine, they do not harm the ozone layer.


In the next module, we will discuss the characteristics of these refrigerants in further detail.


Question #1: CFCs are

  1. Chlorocarbons

  2. Chlorofluorocarbons

  3. Chlorofluorons

  4. Carbonfluoride

Scroll down for the answer...











CFCs are chlorofluorocarbons.


Question #2: CFCs contain which of the following? (Select all that apply)

  1. Cadmium

  2. Carbon

  3. Carbon dioxide

  4. Fluorine

  5. Chlorine

Scroll down for the answer...











Think of the letters in CFC.

The first C is for Chlorine.

The F is for Fluorine.

And the last C is for Carbon.


Question #3: Which of the following are CFCs? (Choose all that apply)

  1. R-12

  2. R-1234yf

  3. R-20

  4. R-11

Scroll down for the answer...











The only refrigerants on this list that are CFC refrigerants are R-11 and R-12.


Question #4: HCFCs are

  1. Hydrocarbons

  2. Hydrofluorocarbons

  3. Hydrochlorofluorocarbons

  4. Hydrochlorofluoros

Scroll down for the answer...











HCFCs are hydrochlorofluorocarbons.


Question #5: HCFCs contain which of the following? (Select all that apply)

  1. Hydrogen

  2. Carbon

  3. Helium

  4. Calcium

Scroll down for the answer...











Think of the letters in HCFC.

The H is for Hydrogen.

The first C is for Chlorine.

The F is for Fluorine.

And the last C is for Carbon.


Question #6: HCFCs contain which of the following? (Select all that apply)

  1. Fluorine

  2. Chlorine

  3. Ceranium

  4. Falon

Scroll down for the answer...











Think of the letters in HCFC.

The H is for Hydrogen.

The first C is for Chlorine.

The F is for Fluorine.

And the last C is for Carbon.


Question #7: Which of the following are HCFCs? (Choose all that apply)

  1. R-22

  2. R-123

  3. R-124

  4. R-211

Scroll down for the answer...











R-22, R-123, and R-124 are all HCFC refrigerants.


Question #8: Which of the following are HCFCs that seen in most refrigeration systems today?

  1. R-22

  2. R-123

  3. R-124

  4. R-211

Scroll down for the answer...











R-22 is the HCFC refrigerant most commonly still seen in refrigeration systems today.

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