Undercounter appliance drain pan

A method of installing an appliance, the appliance comprising a left rear leg, a right rear leg, a left front leg, and a right front leg, the method comprising:

• (a) obtaining an appliance drain pan, the drain pan comprising:
• a floor having a first side portion, a second side portion opposite and spaced apart from the first side portion, and a central portion therebetween;
• an upturned rim around an outer edge of the floor;
• a first plurality of raised projections protruding upward from the first side portion of the floor and extending from a front side of the rim to an opposing back side of the rim;
• and
• a second plurality of raised projections protruding upward from the second side portion of the floor and extending from the front side of the rim to the opposing back side of the rim;
• wherein each projection of the first and second plurality of raised projections has a top surface that is substantially parallel to the floor;
• (b) positioning the drain pan onto a floor surface where the appliance is to be located;
• and
• (c) sliding or lifting the appliance into position on top of the drain pan such that the left rear leg and the left front leg are positioned on the first plurality of raised projections and the right rear leg and the right front leg are positioned on the second plurality of raised projections.