Equipment · Tool
Size the dish room for the rush, not the average.
Seats, pieces, and turns in — machine class and the NSF rating to spec out, using Champion's published selection bands, rack math, and 70% real-world rule.
Your machine class
Class and rating, not a model — water, power, venting, and high-temp vs chemical sanitizing finish the spec, and that walk-through is what your rep and dealer are for. We represent Champion and CMA across the range.
Email me these numbers
Asked every week.
What size commercial dishwasher do I need?
Champion's published bands: undercounter machines to about 50 seats, door-type for 51 to 75, rack conveyors for 75 to 125, and flight-type machines from about 750 seats. Then check the rack math — seats × pieces per cover ÷ rack capacity — against the machine's NSF racks-per-hour rating at 70%.
Why only 70% of the NSF rating?
Because the NSF number is a laboratory ceiling — continuous racks, no gaps. Real dish rooms scrape, load unevenly, and stall between bus tubs. Champion's own guidance: plan on 70% of rated throughput.
High-temp or chemical sanitizing?
High-temp machines sanitize with a 180°F final rinse and dry faster; low-temp machines sanitize chemically and cost less up front but add chemical cost forever. Utility availability and ware type usually decide — a conversation for the spec, not the spreadsheet.
A tool gets you close. A person gets it right.
Every number here is a starting point, not a quote. Your Zink specialist runs these questions for a living — and checking your math costs you nothing.