Multiposition 80% Gas FurnaceSTANDARD FEATURES Four-position furnace: upflow, horizontal right, horizontal left, downflow Electronic control center ECM blower motor Adjustable heating air temperature rise, LED diagnostics and self test feature Hot Surface Ignition (HSI) WFEL is approved for use in Low NOx Air Quality Management Districts LIMITED WARRANTY* 1 year unit replacement limited warranty 20 year heat exchanger limited warranty * 5 year parts (with an additional 5 years parts if properly registered) limited warranty to the original purchaser only for owner-occupied dwellings - see warranty certificate for details