High efficiency condensing furnaces produce acidic condensate during operation. This condensate must be effectively drained from the furnace or corrosion damage may occur. Most manufacturers recommend leveling the furnace to promote condensate drainage out of the system. Always refer to the manufacturer's leveling requirements before installation. An option is to install isolation vibration pads to help to level the furnace. The new furnace system should always be installed in a position that is easily accessible to facilitate future service.