In my attempt to understand the restrictions of putting refrigerant back into the A/C system I have gone down a rabbit hole helping justifying why we pay HVAC technicians so much. From simple refrigerants like ammonia to our current complex molecules r1234yf.

Executive Producers:

Steve E

Dame Slamy

Boostein Berge of the "Mutton, Mead, and Music Podcast"

Older version of Clean Air Act:

https://19january2021snapshot.epa.gov/clean-air-act-overview/clean-air-act-text_.html

Subsection 5:

https://www.govinfo.gov/content/pkg/USCODE-2013-title42/html/USCODE-2013-title42-chap85-subchapI-partC-subparti-sec7470.htm

https://www.epa.gov/clean-air-act-overview/1990-clean-air-act-amendment-summary

https://www.healthline.com/health/bleach-and-vinegar

r134a Refridgerant:

https://en.wikipedia.org/wiki/1%2C1%2C1%2C2-Tetrafluoroethane

Products with 1,1,1,2-Tetrafluoroethane:

https://comptox.epa.gov/chemexpo/chemical/DTXSID1021324/

Basic R134a Refridgerant MSDS:

https://contentinfo.autozone.com/znetcs/msds/en/US/3275

SAE J2276 (2013) Standards:

https://img.antpedia.com/standard/files/pdfs_ora/20221211/sae/SAE%20J2776-2013.pdf

AHRI 700 (SI): Specifications for Refrigerants:

https://www.ahrinet.org/search-standards/ahri-700-si-specifications-refrigerants

R12 Refridgerant:

https://en.wikipedia.org/wiki/Dichlorodifluoromethane

R12 Thermal Properties:

https://www.thermal-engineering.org/dichlorodifluoromethane-refrigerant-r-12-thermal-properties/

https://en.wikipedia.org/wiki/Montreal_Protocol

Ozone Depleting Substances Chart:

https://web.archive.org/web/20080511181352/http://www.epa.gov/ozone/ods.html

Global Warming Potentials of ODS Substitutes:

https://web.archive.org/web/20080516072419/http://www.epa.gov/ozone/geninfo/gwps.html

Scientific Assessment of Ozone Depletion: 2022:

Https://Csl.Noaa.Gov/Assessments/Ozone/2022/

https://www.exploratorium.edu/food/pressure-cooking

https://wonderfulengineering.com/heres-the-scientific-reason-why-compressed-gas-cans-get-so-cold/

https://www.exploratorium.edu/snacks/boyle-ing-water

Boyle's Law Demonstrations:

https://www.youtube.com/watch?v=N5xft2fIqQU

R-22 and R-410A Operating Pressures on Air Conditioners! Checking the Charge!:

https://www.youtube.com/watch?v=5pQUkG43gAI

The Joule-Thomson Effect: What It Is and How It Affects Oil and Gas Production:

https://www.youtube.com/watch?v=M7h59Tg9DS4

Joule-Thomson Effect (Part 1) - why does it happen?:

https://www.youtube.com/watch?v=glXU3z1yRTk

Joule-Thomon Effect (Part 2):

https://robertthanlon.com/2022/08/03/joule-thomson-effect-part-2-my-hypothesis/

https://en.wikipedia.org/wiki/Joule%E2%80%93Thomson_effect

Joule-Thompson Cryocooler:

https://www.youtube.com/watch?v=r_B0RmRlFHA

Making Ethylene (Refrigerant R1150):

https://www.youtube.com/watch?v=UKFEbYdKdJg

How a Car AC System Works - For Beginners:

https://www.youtube.com/watch?v=-INZ2sRrsuo

How to Recover Car AC Refrigerant at Home | DIY Refrigerant Recovery:

https://www.youtube.com/watch?v=O8s5SzUXtiQ

The Chilling History of Refrigerants: from Ether to Modern A2Ls:

https://www.youtube.com/watch?v=yLodYDuL39k

https://www.epa.gov/section608/refrigerant-sales-restriction

https://innovair.com/is-r134a-being-phased-out/

https://refrigeranthq.com/end-users-switching-r-1234yf-vehicles-r-134a/

https://www.dodgedurango.net/threads/anyone-convert-their-r1234yf-systems-back-to-r134a.47770/

https://top-refrigerants.com/en/can-you-put-r134a-r1234yf-system

Mercedes-Benz 2012 recall:

https://static.nhtsa.gov/odi/rcl/2012/RCRIT-12V478-9042.pdf

https://macsmobileairclimate.org/2023/10/05/honeywell-files-epa-snap-application-to-retrofit-r-134a-systems-to-r-1234yf/

https://billybon3.com/

https://www.tabletopwoodworks.com/

https://modernpodcastapps.com/