A “suitable milk house or room” as used in Section 33518 of the Food and Agricultural Code is construed to be one which is sound, readily cleanable, of sanitary construction, provided with adequate working space and so constructed as to provide sufficient light and ventilation. Floors must be of impervious material and have a positive drainage of at least one-fourth inch per foot, to carry liquids to a point at least 100 feet from the milk house or room. Junctions of floor and walls must be coved. No equipment shall be so located as to interfere with cleaning under, over, or around the equipment. Boilers or heaters which emit smoke, soot, oil or odors must not be installed in the milk house or room.