Cleaned and checked 2 condensing gas furnaces. Inspected heat exchangers & flue venting. Checked voltage & amp draw of motors. Check temperature rise. Checked drains. Cleaned burners and flame sensors. Clean and check 2 humidifiers, replace pads, checked water flow and drains. Main system: Blower: 2.3/4.6A . Inducer: 0.30/0.47A . Gas pressure: 1.7/3.5 inches water column. Temperature rise: 59/65 . Supply: 135/141. Bedroom system: Blower: 2.5/4.4A . Inducer: 0.27/0.38A . Gas pressure: 1.55/3.5inches water column. Temperature rise: 59/68 . Supply: 131/143.