Four furnace clean and checks replaced 2 - 16x25x4 air filters and 1 #35 humidifier pads and owners 16x25x4 - 14x20x1 and #35 humidifier pad . Ran test on units and found all to be ok at this time . Nat gas 2 # Basement furnace HSI 47.7 Draft inducer amps .24 Blower amps 1.54 Gas IWC 1.7 to 3.5 Temps RA 63 SA 106 Co 22 First floor HSI spark Draft inducer amps 2.29 Blower amps 4.64 Gas 3.5 Temps RA 72 Series SA 111 Co 18 Second floor HSI 51.6 Draft inducer amps .25 Blower amps 1.10 Gas IWC 1.7 to 3.5 Temps RA 72 SA 98 Co 23 3rd floor HSI 46.3 Draft inducer amps .42 Blower amps 3.18 Gas IWC 3.5 Temps RA 71 SA 117 Co NA mid efficient Jay