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ONLY What is the best drop in replacement freon for R-22?

This question is for Phil...
This question is for Phil ONLYWhat is the best drop in replacement freon for R-22?Can the replacement Freon be used to top off an existing R-22 system or is it best to evacuate the system and then reload with a fresh charge?
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Answered in 5 hours by:
3/19/2018
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,727
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello again, here is an article on the topic from ACR News, one of the industries most respected journals, they recommend R424a... however there are others, R424a actually increases the cooling capacity of the equipment though by 10 to 20%... others R404a for instance reduces the capacity by 5 or 10%. R424a compound has different names from different manufacturers RS44 for example,.

click here please

Click here for another article

The main issues however are:

1. Must be compatible with mineral oil as used in R22 system compressors.

2. Must be locally available at a reasonable price.

.

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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,727
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified
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