We live in a rented mobile home in Texas; the landlord requires us to change filters once a month in the heat/air unit, which is a Coleman Evcon. (There is no model number visible.) The filters were sitting tilted along the side, inside the case, when we moved in. We have lived here over a year and have never removed a dirty filter! When we take them out, they're as clean as they went in. We continue to change them as required, but we're wondering if they are where they :should: be. If anyone can tell us WHERE those filters are supposed to be (my husband suspects there should be something at the top, where there is a grating that is always dirty) it would be a great help.

biggsie

Replacing a furnace filter
Furnace filters should be changed every 30 days. Always use the type of filters recommended by the manufacturer. On most manufactured home furnaces, the filter(s) are located in the furnace door. The doors generally lift off and there's often a top and bottom door. On some furnaces both doors require a filter and others only one door gets a filter.

Foam filters have no front or back so can be installed either way. They are generally held in place with wire clips. When dirty foam filters can be hand-washed in warm soapy water. Be sure to rinse and let dry before re-installing. If you have a foam filter and have trouble locating a replacement, you can find one here.

Box-type filters generally have an arrow somewhere along the edge that indicates the direction of air flow through the filter. Be sure this arrow is pointing towards the furnace. When box-type filters are dirty, throw them away and install new.