Lennox ML180UH070E36A air filter size

Filter size in a side rack16×25×1

The Lennox ML180UH070E36A furnace has no filter of its own. Its filter sits in a rack where the return duct joins it. A rack on the side takes a 16×25×1 filter.

If the rack is underneath the furnace, it's sized by the kit your installer used. The size is printed on the old filter's edge.

Is this your unit?

The model number is on the label on the side of the unit or inside its front panel. It starts with ML180UH070E36A.

Not sure? Take a photo of the label and we'll read it for you.

If your filter isn't in a rack at the furnace

Some homes have the filter behind a grille on the wall or ceiling instead. That one is sized by the grille, not the unit. The size is printed on the filter's edge, or you can photograph it on our home page.

Size from Lennox's product specifications. If it doesn't fit, our fit guarantee sends a new one free. Caliper isn't affiliated with or endorsed by Lennox.