There are two options regarding R22 air conditioning system replacement; full or part replacement.
Full replacement involves the replacement of all air conditioning equipment and component parts. Mitsubishi Electric patented Replace Technology enables part replacement, where the air conditioning equipment is replaced but the existing pipework and electrical system is retained.
In both systems, the new inverter driven R410A & R32 air conditioning unit is used, offering energy savings of around 50%, compared to R22 driven systems. The decision about whether to carry out part of full replacement will be affected by a number of factors:
✓ How old is the air conditioning equipment?
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What is the operating state of the equipment?
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Is there a strong maintenance history on the air conditioning system?
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Is the pipework in good condition?
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What is the payback period for the replacement system?
2003 was the last year in which high volume R22 sales were made and even then, this was less than 20% of the total market volume. Thus many R22 driven air conditioning systems will now be approaching, if they have already not exceeded, 10 years of age.
Several conditions arise when evaluating the payback period for the R22 system replacement:
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The energy efficiency of old equipment is far less than it was when it was originally installed, irrespective of maintenance
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The new R410A driven air conditioning systems are inverter driven, giving reduced running costs and closer comfort levels
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The R410A air conditioning systems are circa 50% more energy efficient than the old R22 based systems
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Rapidly rising energy costs throw energy efficiency into sharp focus