* Airflow shown is for bottom only return ---air supply with factory ---supplied 1 ---in. washable filter(s). For air delivery above 1800 CFM, see Air Delivery table for
other options.
{ Low heat CFM when low---heat rise adjustment switch (SW1 ---3) on furnace control is used.
} AFUE and capacity in accordance with U.S. Government DOE test procedures.
** Gas input ratings are certified for elevations to 2000 ft. For elevations above 2000 ft, reduce ratings 2% for each 1000 ft above sea level. In Canada, derate
the unit 5% for elevations from 2000 to 4500 ft above sea level.