Performed Platinum Comfort Club Membership Tune-Up on Heating System Changed 16-20-1 filters for main house and 14-20-1 filter for other system. All checks were good. Found systems to be in good working order. 2nd system: O2 10.3 Efficiency 91.2 Tstk 110 degrees CO(0) 22ppm Performed Platinum Comfort Club Membership Tune-Up on Cooling System
