CAME OUT FOR ESTIMATE ON EQUIP. INSTALLED 4TON DUEL FUEL PACK UNIT W/DUCT MODS AND RETURNS. MADE SURE EQUIPMENT WAS INSTALL CORRECTLY. CHECK WORK AREA WHEN LEFT TO MAKE SURE THEY WERE CLEAN. CHECK COMPRESSOR DELAY SAFETY CONTROLS. CHECK VOLTAGE AND AMPERAGE ON MOTORS. CHECK THERMOSTAT, AIRFLOW, AIR FILTER, BLOWER COMPONENTS, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS WORKING GOOD.