The standard size of our Humidity and Odor panels is 16″x 13″x 4″. The Home Refrigerator Protection Panel measures 8″x 6″x 1″. The Home Refrigerator Protection Panel will be able to control any residential refrigerator. As a general rule, a HVAC up to 3 tons will require one ProTEC All Natural Humidity Control Panel, which is about 10 pounds. For commercial walk-in coolers one panel per 400 cuft is required.