In 2012, it was time to replace a 31 yr old still working unit as freon was being eliminated and high electric consumption. Did all the research on the product & the installer, yet here we are 7 years later and the coil in the air handler has "numerous holes/leaks" which must have started last year as the refrigerant was totally empty in 2018. We had it filled and added a sealant but when it was time to check the unit this year 2019 - it was again down to 25% of refrigerant . Turns out the warranty is 5 years UNLESS you register your unit on line for the extra 5 yrs which THEY DO NOT TELL YOU. Nor did my licensed installer give me the paperwork to the unit for the warranty registration. So replacing coils will cost $2300 and a total new Air Handler unit is $5400, meanwhile the entire system in 2012 cost $4800. Forget Rheem, they don't stand behind their "supposed" 10 year warranty and will not discuss any amount of renumeration for the coil