Commercial Dishwasher Buying Guide: Door vs Conveyor, High-Temp vs Low-Temp, Hobart vs Jackson vs CMA

The Short Answer

If you're running a café, bar, or small restaurant doing under 300 covers a day, a door-type dishwasher is almost certainly your machine. If you're a hotel, university dining hall, or high-volume restaurant pushing 500+ covers daily, you need a conveyor. Undercounter machines handle the bar program and compact prep spaces. Flight-type machines belong in stadiums and airports.

High-temp vs. low-temp? High-temp uses heat (180°F final rinse) to sanitize — lower chemical cost, faster dry time, better for greasy ware and lipstick-stained glasses. Low-temp uses chemical sanitizer at around 120°F — lower utility costs, simpler install, no booster heater required. Neither is universally better. It depends on your water quality, utility rates, and what you're washing.

Brand-wise: Hobart sets the benchmark for reliability and resale value. Jackson WWS delivers comparable performance at a lower entry price. CMA Dishmachines offers the best value in undercounter and door machines, especially for smaller operators watching the budget hard.

That's the summary. Here's the full breakdown.

1. Dishwasher Types: Which Fits Your Operation

Commercial dishwashers come in four configurations. Each solves a different problem at a different scale. Here's how they stack up:

Undercounter machines sit below the counter — compact, quiet, and purpose-built for limited-volume tasks. They handle 20–30 racks per hour and are designed for bars washing pint glasses, prep areas cleaning sheet pans, or as supplemental machines at a second pass-through station. Browse undercounter commercial dishwashers if your primary need is behind the bar or in a tight prep space.

Door-type machines (also called single-tank or hood machines) are the workhorses of independent restaurants. Load a rack, pull the hood down, run a 60–90 second cycle, unload. One operator runs 40–60 racks per hour with good rhythm. They handle 150–400 covers per day comfortably. Most kitchens that eventually move to a conveyor remember exactly when the door machine stopped keeping up — it usually happened on a busy Saturday night in November.

Conveyor dishwashers are for when one person can't be tied up at the dish station all night. Racks go in one end, clean dishes come out the other — continuously, without waiting for a cycle. A single conveyor at 200 racks/hour does the work of three door machines and three operators. Most conveyor systems also incorporate better energy recovery and water recirculation, which matters significantly at that throughput volume.

Flight-type machines skip racks entirely — dishes ride directly on pegs through the tunnel. Unless you're feeding a hospital or a stadium, this category isn't relevant to your search.

2. High-Temp vs. Low-Temp: What Actually Matters

This is the spec operators overthink. The reality: both methods produce health-department-approved sanitation. The difference is in your ongoing operating costs and a few practical performance factors.

High-temp machines heat the final rinse to at least 180°F — sanitizing by heat alone with no rinse-side chemicals needed. A booster heater (typically mounted on or adjacent to the machine) brings incoming water up to temp. Low-temp machines run a cooler final rinse (~120°F) and inject a chemical sanitizer (usually chlorine or iodine) into the final rinse water. No booster heater, lower install cost — but you're buying sanitizer every month for the machine's life.

The practical decision usually comes down to glass clarity and chemical costs. Running a cocktail bar or upscale dining room? High-temp wins — no chemical residue, spotless stemware, faster rack turns. Running a school cafeteria on a tight operating budget with access to cheap electricity? Low-temp's lower upfront install and reduced energy draw can pencil out meaningfully over the machine's life.

3. Racks Per Hour: How to Actually Size It

Buying a machine that can't keep pace is the most common — and most painful — mistake. Here's the math to size it right before you shop.

Standard rule of thumb: one rack handles roughly 20 covers' worth of dishes (plates, glasses, flatware spread across multiple racks). A door machine's wash cycle is 60–90 seconds, but that ignores loading, unloading, and scraping. Real-world throughput with one operator is closer to 40–55 racks/hour. Use the effective number, not the spec sheet number.

Size for your worst Friday night in December — not your average Tuesday. A machine that's maxed out on a busy service means your team drowning at the station and dishes piling up on the line.

Also account for turn-time if you're running a fast-casual or multi-daypart operation. A breakfast-lunch-dinner spot turning tables every 45 minutes generates three separate peak demand windows. Map your worst-case single hour, add a 20% buffer, and spec to that number. The extra capacity costs less upfront than the labor and stress of an undersized machine.

4. Door vs. Conveyor: Head to Head

The conveyor-vs-door decision isn't always purely about throughput — it's about labor math. A conveyor at 250 racks/hour with one loader and one unloader matches the output of four door machines and four operators. If you're running high volume, the conveyor frequently pays for itself in reduced labor costs within two years. Run the math for your operation before assuming the door machine is "good enough."

5. Top Brands: Hobart, Jackson WWS, and CMA Dishmachines

Hobart

Hobart is the benchmark brand in commercial warewashing — not for flash, but for longevity. Hobart machines routinely last 15–20 years in commercial kitchens with routine maintenance. Backed by ITW Food Equipment Group, parts are available everywhere and every market has qualified Hobart service technicians. Used Hobarts hold resale value better than any other brand in this category, which matters when you're thinking about a 10-year ownership horizon.

Their warewash lineup spans entry-level Centerline door machines to massive flight-type systems. Signature technologies include the FlexTemp rinse system, which adjusts water temperature based on incoming supply conditions, and the vapor vent condenser on select models, which recaptures kitchen-bound steam and reduces heat load on your HVAC. Multiple Hobart models carry ENERGY STAR® certification.

Typical price range: $6,000–$45,000+ (door to conveyor)

Recommended models:

• Hobart CDL-1 Centerline Door Dishwasher — Entry-level door machine, 60 racks/hr, built to commercial Hobart specs at a more accessible price point. Ideal starting machine for independent restaurants.
• Hobart PW20-2 Conveyor Dishwasher — Professional-grade single-tank conveyor, 232 racks/hr, energy recovery standard. The right call for hotels and high-volume foodservice.

Browse the full Hobart warewash collection at USA Restaurant Suppliers.

Jackson WWS

Jackson WWS (Warewashing Solutions) has been building commercial dishwashers in the United States since 1949. They compete directly with Hobart on specs and consistently come in 15–25% lower for comparable throughput. Build quality is solid, parts availability is good nationally, and Jackson is a common choice for operators who want Hobart-tier performance without paying the Hobart premium.

Jackson's Conserver series is engineered specifically for water conservation — some models run under 0.6 gallons per rack, among the lowest in the category. Their gauge-pressure rinse systems maintain consistent wash performance even when incoming water pressure varies, which is a real issue in older buildings or municipalities with unreliable supply pressure.

Typical price range: $4,500–$30,000+ (door to conveyor)

Recommended models:

• Jackson WWS Conserver XL2C Door Dishwasher — High-efficiency door machine, 40 racks/hr, NSF/ANSI 3 certified. Exceptional water conservation for its class — a strong choice for operations watching utility costs.
• Jackson WWS 10A Conveyor Dishwasher — Entry-level single-tank conveyor, 160 racks/hr. Strong ROI for growing operations that have outgrown door machines but aren't ready for Hobart conveyor pricing.

Explore the full Jackson WWS lineup at USA Restaurant Suppliers.

CMA Dishmachines

CMA Dishmachines is the independent operator's best-value option. Based in Garden Grove, CA and manufacturing in the US since 1960, CMA is particularly strong in the undercounter and door-type segments. Their machines are built simply, service easily, and cost meaningfully less than comparable Hobart models. For budget-conscious small-to-mid operators, few brands deliver more dishwasher per dollar.

CMA's Energy-Mizer ventless line deserves special mention: it captures exhaust steam internally, recycles that heat back into the wash cycle, and requires no external ventilation. For kitchens where running new ductwork costs $10,000–$20,000, this completely changes the install decision. It's one of the best-engineered solutions in the undercounter segment for retrofit applications.

Typical price range: $2,000–$12,000 (undercounter to door)

Recommended models:

• CMA UC50e Undercounter Dishwasher — Compact, 30 racks/hr, high-temp sanitization. Built for bars and cafe counters where space is tight and glassware clarity matters.
• CMA 180-C Door Dishwasher — Workhorse door machine, 52 racks/hr, straightforward controls and simple serviceability. A reliable first machine for independent operators.
• CMA 180-VL Ventless Undercounter Dishwasher — No ventilation hookup needed. Purpose-built for tight retrofits where ductwork isn't an option.

Browse all CMA Dishmachines models at USA Restaurant Suppliers.

6. Features Worth Paying For

Not every line on a spec sheet moves the needle in the real world. After putting in a lot of these machines, here's what actually matters:

Rinse booster heaters. Required for any high-temp machine to reliably hit the 180°F sanitization threshold. Some machines include the booster; others require a separate purchase and installation. Confirm this before you buy — a booster add-on can run $500–$1,500 that wasn't in your project budget.

Energy recovery systems. Higher-end conveyors — and some premium door machines — capture heat from exhaust steam and return it to incoming water supply. The U.S. Department of Energy estimates commercial kitchens can recover 30–60% of water heating energy with these systems. On a conveyor running 8 hours daily, that's measurable money on your utility bill every month.

Ventless technology. Standard commercial dishwashers exhaust steam and require a properly engineered hood ventilation system. Ventless machines (like CMA's Energy-Mizer line and Hobart's vapor vent condenser models) condense steam internally and recirculate that heat. If you're retrofitting an existing space or operating in a building where new ductwork is cost-prohibitive, ventless pays back its premium fast.

Water softener ports / scale prevention. Hard water is the silent machine killer. Scale buildup clogs spray arms, reduces heat transfer efficiency, and destroys heating elements years ahead of schedule. If your location has hard water — common across the Midwest and Southwest — budget for a water softener at installation time. Many Hobart and Jackson models include integrated softener ports that make this straightforward.

ENERGY STAR certification. ENERGY STAR-certified commercial dishwashers use at least 25% less energy and water than baseline models. Utility rebate programs frequently apply to ENERGY STAR machines — check with your local utility before purchase. Rebates of $500–$2,000 are common and can significantly offset the purchase price of a more efficient machine.

Ready to Find Your Machine?

Whether you're equipping a new build or replacing a machine that's finally given out, matching the right dishwasher to your volume makes a real difference — in labor costs, utility bills, and how your team feels at the end of a long shift.

Shop by type:

• All Commercial Dishwashers
• Undercounter Dishwashers
• Conveyor Dishwashers

Shop by brand:

• Hobart Warewash Equipment
• Jackson WWS Dishwashers
• CMA Dishmachines

Questions about sizing for your specific covers, comparing models, or understanding what's right for a particular kitchen layout? Call us or use the live chat — we've spec'd a lot of these installations and we'll give you a straight answer.