Student Reviews
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Video of HVAC 112 HCFC 22 and HFC 410A in HVAC course by Love2HVAC with Ty Branaman channel, video No. 138 free certified online
comparing HCFC 22 (R22) mineral oil to HFC 410a (R410a) poe oil
407c retrofit guide
https://www.freon.com/en/-/media/files/freon/freon-407c-retrofit-guidelines.pdf
HCFC R22 retrofit guide
https://www.epa.gov/sites/default/files/documents/Choosing_Right_R22_Retrofit.pdf
Refrigerant retrofit tables
https://insights.globalspec.com/article/12249/what-is-the-ideal-refrigerant
R22 vs 410a compressor size https://www.youtube.com/watch?va4BOYxIZwJs
Mixing refregerants https://www.hanoversupply.com/mixing-refrigerants/#:~:textRecycling%20of%20mixed%20refrigerants%20isn%E2%80%99t%20possible%20There%E2%80%99s%20no,from%20the%20authorities%29.%20Lack%20of%20pressure%20temperature%20charts
EPA ODP phaseout
https://www.epa.gov/ods-phaseout
EPA HFC phaseout
https://www.epa.gov/climate-hfcs-reduction
https://www.epa.gov/climate-hfcs-reduction/final-rule-phasedown-hydrofluorocarbons-establishing-allowance-allocation
https://www.epa.gov/system/files/documents/2021-09/hfc-allocation-rule-nprm-fact-sheet-finalrule.pdf
https://www.epa.gov/snap
https://www.epa.gov/ods-phaseout/homeowners-and-consumers-frequently-asked-questions
https://www.epa.gov/snap/unacceptable-substitute-refrigerants
Article on refrigerant phaseouts
https://refrigeranthq.com/epa-announces-phaseouts-of-hfc-refrigerants/
Acids https://www.hvacinvestigators.com/understanding-hvac-diagnoses-acidic-refrigerant/#:~:textWhen%20POE%20oils%20%28as%20opposed%20to%20the%20refrigerant%29,lose%20its%20ability%20to%20properly%20lubricate%20the%20compressor.
https://www.achrnews.com/articles/94187-the-effect-of-moisture-on-poes
https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article2731&contextiracc
https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article2731&contextiracc
https://www.achrnews.com/articles/102899-working-with-poe-oils-requires-forethought#:~:textPOE%20oil%20can%20absorb%20moisture%20through%20the%20walls,a%20system%2C%20releasing%20debris%20that%20might%20be%20present.
Graph comparing R22-410 capacity
http://www.eurocooling.com/articler410a.htm