SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/epa-r123-equipment-room-sensor

Under ASHRAE Standard 15, as covered in EPA's Type III topics, R-123 equipment rooms need what?

An equipment room refrigerant sensor for R-123.

Start playing free

  1. A refrigerant sensor ✔
  2. A second rupture disc
  3. An ice bath

Why: ASHRAE Standard 15 requires a refrigerant sensor in equipment rooms with R-123. EPA's Type III test topics cover it, along with the oxygen deprivation sensor requirement for all refrigerants.

Huh, didn't know that: R-123 is one of EPA's listed low-pressure refrigerants, which is why it shows up on the Type III test.

The dad joke
I tried to write a chemistry joke, but I could never get a reaction.
Like this card?
Play the game

References

Answer: A refrigerant sensor. ASHRAE Standard 15 requires a refrigerant sensor in equipment rooms with R-123. EPA's Type III test topics cover it, along with the oxygen deprivation sensor requirement for all refrigerants.

  1. EPA Section 608 Technician Certification Test Topics www.epa.gov/section608/test-topics
    Under ASHRAE Standard 15, need to have equipment room refrigerant sensor for R-123
    Checked 2026-10-10.
  2. 40 CFR 82.152 Definitions (Cornell LII) www.law.cornell.edu/cfr/text/40/82.152
    appliances using R-11, R-123, R-113, and R-245fa
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Trades & ShopWhat is the maximum a refrigerant cylinder should be filled, by volume?Trades & ShopReusable refrigerant recovery cylinders are identified by which color code?Trades & ShopA disposable refrigerant cylinder is empty. What should you never do with it?

That's stuff everyone should know.