The most important information to know when replacing the M1-1056 Furnace Filter
Many furnace filters are can easily be replaced with another brand and you may be able to get equal quality air filtration at a significantly lower price. But just because a filter has the same size printed on it as your current filter does not mean it is a suitable replacement. To Find the correct replacement furnace filter it is important to make sure the actual size(measured dimensions of the air filter) of the filter being replaced are the same as the filter being purchased. The Nominal size printed on the filter is often a rounded size and actual sizes vary by brand. The Actual Size of the M1-1056 is 15-3/8 X 25-1/2 X 5-1/4.
