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How to Choose a Commercial Dishwasher: Beyond Seat Count
August 31, 2026
Introduction
The obvious number is rarely the whole answer. A prep station upgrade looks like a simple swap until you notice it can solve two problems instead of one. A dishwasher looks like a seat-count calculation until you look at what’s actually coming back to the pit.
Here are two recent examples of looking past the obvious spec — a finished install at The Garrett Club, and what actually drives a dishwasher decision.
Summary · Key Takeaways
01
A refrigerated worktop can solve two problems at once — cold storage and code-compliant power — instead of addressing each separately.
02
GFCI outlets built into a prep station put power exactly where it’s needed, without a separate electrical run.
03
Seating capacity is a starting point for sizing a dishwasher, not the full answer — ware type and peak throughput matter more.
04
The type of ware — glassware, china, sheet pans — shapes the machine as much as the volume does.
05
High-temp and chemical sanitizing dishwashers carry different utility and operating-cost tradeoffs.
06
In both cases, the equipment that actually fits is sized around real peak use, not the number that’s easiest to count.
Sheet 02 · Case One
The Garrett Club Upgrade
Some upgrades solve one problem. This one solved two. At The Garrett Club in Buffalo, NY, a new refrigerated worktop didn’t just add cold storage where the kitchen needed it — it put code-compliant power exactly where the prep line needed that too.
IMG. 01The Garrett Club · Buffalo, NY
The finished worktop: refrigerated base, stainless overshelf, and outlets built into the unit itself.
01
More Cold Storage, Right Where It’s Used
The refrigerated base sits directly under the prep surface, giving the kitchen additional cold storage without adding a separate unit or sending staff further from the line.
02
Power Where The Prep Line Needs It
GFCI outlets built into the unit mean small equipment plugs in right at the worktop — no extension cords, no separate outlet run across the kitchen.
03
Code-Compliant By Design
Outlets near a wet prep line need GFCI protection to meet code. Building it into the equipment itself means that’s solved before the health inspector ever asks.
Storage and code-compliant power, in one unit.
Sheet 03 · Case Two
Sizing A Dishwasher
Most operators size a dishwasher off their seat count. That’s a reasonable place to start — it’s just not the whole answer. Two kitchens with identical dining rooms can need completely different machines once you look at what’s actually coming back to the dish pit.
VIDEOHow To Choose A Commercial Dishwasher
“How to pick the right dishwasher for your restaurant, hotel, banquet facility, university or school.” — from HRI’s YouTube channel.
01
Ware Type Changes The Equation
A bar-heavy concept washing mostly glassware has different rack and chemical needs than a full-service kitchen cycling china, flatware, and full-size sheet pans. The mix of ware shapes the machine, not just the count.
02
Meal Period Peaks, Not Seat Count
What matters is how much ware needs to turn in your busiest 30 minutes, not your average night. A dining room that turns tables fast needs more throughput than the same seat count with a slower, single-seating format.
03
Water, Heat, and Chemical Considerations
High-temp machines sanitize with hot water and need the utility capacity to supply it. Chemical sanitizing machines run cooler but bring ongoing chemical cost. Each option changes both the install requirements and what it costs to run.
Seating capacity is a start. It’s not the spec.
Sheet 04 · Q&A
Questions
Q01What is a refrigerated worktop?
A prep table with a refrigerated base built in — the work surface sits directly above cold storage, so ingredients stay within reach instead of a trip to a separate cooler.
Q02Why does a prep line need GFCI outlets specifically?
GFCI (ground-fault circuit interrupter) outlets cut power the instant they detect a ground fault, which matters anywhere water and electricity are close together — exactly the environment around a prep sink or wash-down area.
Q03Does a bigger dining room always need a bigger dishwasher?
Not necessarily. A smaller dining room with fast table turns and heavy ware can need more washing capacity than a larger room with a slower pace — throughput during peak service matters more than raw seat count.
Q04What’s the difference between high-temp and chemical sanitizing dishwashers?
High-temp machines sanitize with hot water, which requires enough water heating capacity to keep up. Chemical sanitizing machines use lower water temperatures plus a sanitizing chemical, which lowers utility demand but adds an ongoing chemical cost.
Q05How do I know if I need a conveyor or flight-type dishwasher instead of a door-type?
It comes down to volume and continuous throughput. Door-type machines suit lower-volume kitchens running batch cycles; conveyor and flight-type machines are built for high-volume operations that need ware moving through continuously rather than in racks.
HRI Commercial Food Service designs, supplies, and installs commercial kitchen equipment — from prep stations to full warewashing lines — across Pennsylvania, Ohio, and New York. Whatever the obvious spec on your project is, we’ll help you look past it. Start the conversation at hriusa.com.
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