Side-Return Furnace

• 1). Shut off the power to your furnace before you check or replace the filter.
  
  
• 2). Grab onto the end of the filter and slide it out of the slot if yours is a side-return furnace. It will be positioned vertically in the slot.
  
  
• 3). Take the filter outside and shake out the dust if is a cleanable filter. Vacuum the surface of the filter to remove dirt, and wipe it down with soapy water. Replace it when it has dried.
  
  
• 4). Slide the new filter into the slot in the same way the old one came out.
  
  

Bottom-Return Furnace

• 1). Shut off the power to your furnace before you check or replace the filter.
  
  
• 2). Grab onto the sides of the lower front panel of the furnace, lift it up and pull it off to reveal the filter. It will be positioned horizontally in the furnace.
  
  
• 3). Grab the filter and pull it out toward the front to remove it from the furnace.
  
  
• 4). Take the filter outside and shake out the dust if is a cleanable filter. Vacuum the surface of the filter to remove dirt, and wipe it down with soapy water. Replace it when it has dried.
  
  
• 5). Slide the new filter into the furnace in the same manner the old one came out.