The average life expectancy of a walk-in unit is 15 year, but with proper care and the replacement of components, it can last much longer. The following article from Food Equipment Reports magazine provides guidelines for maintaining walk-ins and replacing major components – including when to replace the box:
Manufacturers estimate the average lifespan of a walk-in cooler or freezer to be 15 years. However, with decent care and maintenance, they can last well beyond that. Sometimes all it takes is a little refurbishment. “If the box is sound, it still holds temperature, has no water infiltration into the insulation and no air leaks, refurbishment can make sense,” one manufacturer says.