My brother-in-law called me the week he moved into a smaller apartment, and the question he asked sounded simple enough that I answered in four seconds. He wanted to know which of two specialty refrigerators would hold more, and one was listed at 330L while the other was listed at 221L. I told him to buy the bigger one, and he did. Two months later he sent me a photograph of the interior, and the shelves were carrying about what his previous cabinet had carried, some distance from what either of us had pictured from the spec sheets.
The gap between those figures and what actually sat on his shelves came down to something neither of us had thought to ask about. A capacity number printed on an appliance describes the total interior volume of the cabinet, measured wall to wall, and it counts the door bins, the gaps between shelves, and every centimetre of air that a sealed container will never occupy. An ordinary refrigerator keeps that distinction minor, because you fill the space with irregular objects that settle into whatever room is available. In a cabinet designed around rigid stackable containers, the distinction becomes the entire calculation, and nobody prints the second figure on the front of the box.
Where the Missing Litres Go
The containers themselves account for the gap, and their geometry is the part that never reaches the marketing copy. A kimchi refrigerator is designed around sealed rigid vessels, which have thick walls, fixed external dimensions, and lids that need clearance overhead before a door or a panel will close. Once you add up the stated volume of every container that ships with a given unit, you get a figure that behaves very differently from the headline number. On the two models my brother-in-law had been weighing, the smaller cabinet arrived with containers totalling around 134L, while the larger one arrived with containers totalling around 113L. The unit carrying 109 fewer litres on its label was the one that held more food.
That inversion follows from how the two formats are built. A top-opening cabinet chills through its own walls, so the interior can be a single deep well with large containers lowered straight down into it, and the share of stated volume that survives as usable container space sits near sixty percent. The front-opening design circulates chilled air with a fan and splits its interior into drawers, each needing framing, rails, and clearance to slide, so the surviving share falls into the mid thirties. Top-opening efficiency runs nearly double, which is an awkward thing to learn after you have paid for the larger cabinet and watched it carried up a stairwell.
I found the arithmetic set out properly only after the purchase was done, in a breakdown of how stated litres translate into actual container volume across the two cabinet formats. The page did what the retail listings had skipped, placing container totals beside label figures for named models so the ratio became something you could see rather than something you had to trust. Every model on that page is listed twice, once by its label and once by the sum of the vessels in the box, and the two orderings do not match.
My brother-in-law’s follow-up question was whether he could simply buy more containers and fill the leftover air, which is the obvious move and mostly a dead end. Extra vessels are sold separately, and a drawer with room for a third one will take a third one. A drawer sized for two will not, however many arrive in the post. The frame, the rails, and the clearance a lid needs before a drawer will close are all fixed on the day the cabinet is built, so what ships inside a unit sits close to the ceiling of what that unit accepts. He has since worked out that his 330L cabinet tops out somewhere near 120L of sealed vessels, which lands within a few litres of where the container total already put it. The number on the door has not moved since February. His reading of it has.