No r22 is being phased out, the dates varie from country to country, but is already hard to get in some places
No.
Most new equipment is built for and charged with R410a, a refrigerant with much higher pressures than the R22 used for decades, R22 units are still available, dry charged however, you must fill them with R22 onsite. This is how new R22 compatible equipments being sold still.
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R22
The cost of 125 pounds of R22 refrigerant can vary depending on market prices and supplier rates. On average, you can expect to pay anywhere from $50 to $100 per pound for R22 refrigerant. Therefore, the total cost for 125 pounds of R22 could range from $6,250 to $12,500.
A 2-ton air conditioner typically contains around 4-5 pounds of R22 refrigerant.
No
No, refrigerants cannot be blended.
if approved by the compressor manufacturer, then yes, if not, then no...