One Door Solid Door reach-in freezers are designed with one solid door, the front door. These units are often used in restaurants and convenience stores, where it is important to keep the front of the unit clear for easy access by staff. They can come in different sizes and materials, depending on what they will be used for. Most are made from a few different materials, including stainless steel, aluminum, and plastic. One Door Solid Door Reach-In Freezers are highly energy efficient. The energy efficiency is due to the thick insulation that keeps the cold inside and the heat outside where it belongs. Some solid doors are designed with vents or holes to help keep them cool. There are also designs with a door opener on top rather than side-mounted door handles. Solid door reach-in freezers usually have a manual defrost capability and a non-adjustable thermostat. The internal dimensions of these units are usually about 24 inches wide and 36 inches high. When it comes to product capacity, these freezers are usually capable of storing up to 5 tons of frozen foods.