Performed Comfort Club maintenance on the air handler/water-coil system and inspected the Rinnai tankless that feeds the coil. System is from 2011 and in fair condition. Blower wheel and blower section is clean. Older hydronic piping noted but still in fair shape with no leaks. Verified full heat cycle, temperature rise, and safeties. Tankless operating normally with no error codes. System running properly at this time.