When deciding to purchase a walk-in, you must determine the amount of storage space you need. On average, 1-cu.-ft. of open storage will hold about 28 lbs. of solid food. In addition, you must establish a convenient location near work areas and drain lines and also consider the condition of ceilings and floor to make certain there is ventilation and proper load bearing. Walk-ins should have quality doors with heavy-duty hinges and durable door frames that can stand up to unlimited use. Routine cleaning of condenser coils by a certified technician is essential in maintaining a well functioning unit. To avoid cross-contamination, separate raw food from prepared food. Keep shelving at least 6 inches from the floor for easy cleaning and place a thermometer in the warmest part of the unit to measure air temperature.