931 32b) Electronic air cleaner (EAC) – Refer to EAC Owner’sManual for maintenance information.5. If washable filter, wash filter (if dirty) in sink, bathtub, or out-side with a garden hose. Always use cold tap water. A mildliquid detergent may be used if necessary. Spray waterthrough filter in the opposite direction of airflow. Allow filterto dry.6. Reinstall clean air filter7. Reinstall filter retainer (for blower compartment locationsonly)8. Replace blower access panel and main furnace door (SeeFig. 35 and 36.) or filter cabinet door (Fig. 37 and 38.)9. Turn on electrical supply to furnace.If your furnace air filter needs to be replaced, be sure to use afactory-authorized filter of the same size that was orginally sup-plied. Use the filter tables and compare your furnace size with theproper filter size.33 3435 3637 38* Factory-provided with the furnace. Filters may be field modified by cutting-filter material and support rods (3) in filters.† Upflow only. Alternate sizes and additional filters may be ordered from yourdealer.COMBUSTION AREA AND VENT SYSTEMVisually inspect the combustion area and vent system beforeeach heating season. Make sure that all PVC pipes leading intothe combustion area and vent are free from any cracks and sags.A05100FURNACE AIR FILTER TABLEAIR FILTER LOCATED IN BLOWER COMPARTMENTFURNACECASINGWIDTH (IN.)FILTER SIZE (IN)FILTERTYPESide Return†* Bottom Return*17-1/2 (1) 16 x 25 x 1 (1) 16 x 25 x 1 Cleanable21 (1) 16 x 25 x 1 (1) 20 x 25 x 1 Cleanable24-1/2 (1 or 2) 16 x 25 x 1 (1) 24 x 25 x 1 CleanableAIR FILTER LOCATED IN FILTER CABINETFILTERCABINETHEIGHT (IN)FILTERSIZE (IN)FILTERTYPE16 (1) 16 x 25 x 1*or (1) 16 x 25 x 4-5/16Cleanable orDisposable20 (1) 20 x 25 x 1*or (1) 20 x 25 x 4-5/16Cleanable orDisposable24 (1) 24 x 25 x 1*or (1) 24 x 25 x 4-5/16Cleanable orDisposableWARNINGPERSONAL INJURY HAZARDFailure to follow this warning could result in per-sonal injury.Use care when cutting support rods in filters to protectagainst flying pieces and sharp rod ends. Wear safetyglasses, gloves, and appropriate protective clothing.WARNINGCARBON MONOXIDE POISONING HAZARDFailure to follow this warning could result in per-sonal injury or death.If holes are found in the pipes or if any portion hasbecome disconnected, toxic fumes can escape intoyour home. DO NOT OPERATE YOUR FURNACE.Call your dealer for service.!!