Cleaned & checked 2 gas furnaces, 1 electric furnace, 1 electric package unit. Inspected heat exchangers & flue venting. cleaned burners & flame sensors. Checked voltage & amp draw of motors. Test capacitors. First floor system: Replaced thermostat batteries. Vacuum filter. Blower: 4.4/5.6A . Inducer: 0.31/0.60A. Temperature rise: 39/52 . Supply: 115/128 . Return: 76. Antique room: vacuum filter. Blower: 2.8A. Inducer: 0.95A. Gas pressure: 3.6 inches water column. Temperature rise: 66. Thermostat: 50. Supply: 128. Return: 61 . Second floor system: Replaced thermostat batteries. Vacuum filter. Tested heating elements. Tested sequencer. Checked voltage & amp draw of blower. Test capacitor. Package unit: Tested heating elements. System amp draw: 43.3A. Tested sequencers. Checked voltage & amp draw of blower. Test capacitor. Check temperature rise. 46. Return: 74. Supply: 120.