As of January 1, 2010, new refrigeration and air conditioning equipment can no longer be produced using R-22 as a refrigerant. R22 will still be produced for servicing existing equipment, but by the year 2020, R22 will only be available from previously recovered and recycled sources and will no longer be produced.
If you are faced with issue of the changeover, R410a may be a refrigerant you are considering. R410a is very different from R22 and so there are various issues associated with the changeover, namely the much higher discharge pressure. The first rule of thumb is that there is no drop-in replacement for any refrigerant currently being used. Each substitute refrigerant used will require some design changes in the refrigeration system. An R22 system cannot be charged with R410a since the components were not rated for the higher pressures associated with it.
There are several reasons why R410a is being considered as a suitable replacement for R22:
· High cooling capacity: equipment designed for R410a has been shown to have up to a 40% higher cooling capacity compared to R22.
· Easy servicing: While R410a is a blend, it behaves more like a pure refrigerant and therefore it can be re-charged into the system repeatedly without danger of inconsistent mixing.
· Safe: R410a has an A1 ASHRAE safety classification.