i have an older rheem rpgb 025 jaz heat pump with a rhqa 1010s air handler,im looking at replacing the condenser, I was told that this air handler would not work well with the newer 13 seer 22r units,said it would be ok in air conditioning mode,but would be a problem in heat mode,is this true? and what unit can i use to replace the condenser and still use the air handler, thx Dan