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Door Type Warewashers

Door-type Warewashing Machines Buying Guide

Commercial warewashers ensure that large quantities of dishes, glasses, utensils, and similar kitchenware can be cleaned quickly with minimum energy use and maximum efficiency. The food service industry relies on high-capacity door-type warewashing machines to conduct their daily operations. A clean cycle of dishes should be maintained to ensure a steady supply of wares throughout the busy hours.

There are 7 main types of door-type commercial dishwashers and 13 points you should consider before purchasing. Considering factors such as size, capacity, brand, warranty, etc., you can make the best choice for your unique needs.

7 Types of Door-Type Warewashing Machines

Door-type warewashers, also known as pass-through dishwashers or hood-type dishwashers, come in various models to suit the specific needs of different commercial kitchens. The main types of door-type warewashers include the following:

1. High-Temperature Door-Type Dishwashers: These dishwashers use high-temperature water for the final rinse to sanitize dishes. While they usually operate at 140℉ to 165℉(60-74℃), they typically reach temperatures above 180°F (82°C) during the final rinse, ensuring effective sterilization. High-temperature door-type dishwashers are commonly used in commercial kitchens. They are faster than their low-temp counterparts, and thanks to the built-in heating components they possess, they can raise the temperature of the water for the final rinse of the cycle.  

2. Low-Temperature Door-Type Dishwashers: Instead of high-temperature rinsing, low-temperature dishwashers use chemical sanitizers, such as chlorine or iodine, to achieve sanitization. They are generally more energy-efficient than high-temperature models but require sanitizing chemicals. The usual operation temperature for low-temp dishwashers ranges from 125℉ to 145℉ (51-62℃). Since no built-in heating components are available in these models, the machine relies on a water tank for hot water supply and cannot raise the temperature.

3. Conveyor Door-Type Dishwashers: Conveyor dishwashers are larger and more automated than standard dishwashers. They have a conveyor belt system that moves racks of dishes through the machine, allowing for high-volume dishwashing. Conveyor dishwashers are often used in very busy commercial kitchens and cafeterias.

Jackson WWS CONSERVER XL2C 48-1/2" Double Rack Corner Door Type Dishwasher, Low Temp, 74 Racks/hr

4. Compact Door-Type Dishwashers: These are smaller versions of door-type warewashing machines designed for kitchens with limited space. They offer many of the same features and benefits as larger models but are more compact. Their size makes them a good option for many, but you should ensure they can meet your demand.

5. Corner Door-Type Dishwashers: Corner dishwashers are designed to fit into the corners of kitchen layouts. They save space and maximize the use of available kitchen space.

6. Undercounter Door-Type Dishwashers: Undercounter dishwashers are small, compact door-type units that can be installed under a counter or work surface. They are suitable for small restaurants, bars, and cafes with lower dishwashing volume.

7. Flight-Type Dishwashers: Large, conveyor-style dishwashers designed for extremely high-volume operations, such as large-scale banquet facilities, institutional kitchens, and correctional facilities. They can process a continuous flow of dishes on a conveyor belt. The belt is usually in a straight line, and you can directly place the dishes on the belt. The belt’s width and height define how much you can wash in a cycle. The standard width is usually 28 inches (71.12 cm), and the standard height is 18 inches (45.72 cm). You can opt for larger dimensions to accommodate larger products.  

The choice of door-type warewasher depends on the volume of dishes to be washed, available space in the kitchen, budget considerations, and the specific needs of the foodservice establishment. Each type has advantages and limitations, and selecting the right one is essential to maintaining an efficient and effective dishwashing process in a commercial kitchen.

What to Consider When Choosing a Door-Type Warewashing Machine?

There are several things you should consider before picking a door-type warewashing machine.

door-type ware washing machine - Centerline by Hobart CDH-1 High Temp Door Type Dishwasher, 51-Racks/Hour - Door-type Warewashing Machines Buying Guide

1. Capacity & Size: When considering the dishwasher’s capacity, you should consider the daily volume of dishes your establishment produces. Door-type warewashers typically process 30 to 350 dishes and flatware racks daily. You should also ensure that the dishwasher fits perfectly in your establishment’s kitchen space, preferably against a wall or in a corner.

2. Energy Efficiency: You should check the water used per cycle and look for energy efficiency ratings to determine the operational efficiency of the dishwasher. Generally, the less water used means the equipment is environmentally friendly and more efficient. ENERGY STAR-labeled machines are better for these purposes.

3. Speed and Duration of Wash Cycles: The duration and speed of your dishwasher wash cycles, as well as its drying capabilities, needed to be checked first. An efficient commercial dishwasher saves resources and ensures a quick cleaning process. If your machine is smaller, it should be faster to compensate for the low capacity.

4. Cleaning Performance: Cleaning is the main function of the warewasher, and it should work without issue. The following should be in perfect condition for the cleaning performance to be considered sufficient.

  • Temperature Breakdown: You should make sure that your machine’s wash and rinse cycle temperatures meet health standards for commercial dishwashers. The Food and Drug Administration (FDA) recommends using temperatures that range from 165°F (73.9°C) to 180 °F(82.2°C)
  • Quality of Cleaning: You should evaluate your ware washing machine’s performance on heavily soiled dishes to see if your washed dishes are up to code. Seeing spots and leftovers on your dishes after a cycle could indicate that your dishwasher needs maintenance. Filters, pipes, and washing apparatus might need to be checked for blockage and clogging. Regular maintenance and cleaning are necessary to ensure the quality does not fall below a standard.

5. Ease of Use: A user-friendly dishwashing machine significantly affects your establishment’s efficiency. You should pick dishwashers with digital displays and user-friendly controls. Automation features like auto-start function and soil sensors can enhance user convenience, simplify your operations, and save time and effort, making your establishment more efficient.

6. Durability and Build: The durability and build of a door-type ware washing machine are crucial for long-term reliability. It would be best if you chose machines made with stainless steel due to its corrosion resistance. You should also check the quality of your machine’s hinges, latches, and seals and ensure they are reliable for long-term usage. Wear and tear due to usage in the long term might impact the efficiency of your machine and your establishment. Wear and tear can also result in leakages, which would shorten the life span of your machine. Keep an eye out for problems and ensure regular maintenance is carried out to prolong your machine’s longevity.

Stero SD3T-6 35" High Temp Door-Type Dishwasher

7. Sanitation & Compliance: Meeting health and sanitation standards are non-negotiable for respectable establishments. You should make sure that your dishwashing machine meets the health and sanitation standards that the FDA sets. FDA requires dishwashers to reach a surface temperature of about 160°F (71.11°C).

8. Certifications: You should look for certifications such as NSF International (or equivalent certifications). These certifications indicate that your machinery follows industry standards for hygiene and cleanliness. For instance, NSF International certifies that the dishwasher can remove 99.999 percent of bacteria.

9. Installation & Maintenance: Before acquiring a dishwasher, you should check if it is compatible with your kitchen’s existing electrical and plumbing systems. Otherwise, installing your unit could require fundamental changes. Also, if possible, you should opt for professional installment to avoid any mishaps.

10. Ease of Maintenance: Before acquiring a dishwasher, you should look for maintenance tips and information on longevity expectations to see if the machine can be maintained and fixed easily and to see if the machine you’re acquiring can be trusted in the long term.

11. Price & Warranty: Before acquiring a warewashing machine, you should research the market to learn the price range for door-type dishwashers. You should also check what warranties are available and understand what these warranties cover. Potential maintenance costs might be too much, and a reliable warranty can save you from that trouble.

12. Safety Features: Door-type ware washing machines operate frequently and at high temperatures, making them susceptible to malfunctions and hazards. The unit’s safety features can ensure that you don’t face leaks, overflows, and major breakdowns. You should pay special attention to the following 5 safety features.

  • Temperature control mechanisms ensure the machine doesn’t overheat and damage the dishes or the internal structure.
  • Door safety locks are necessary to prevent leaks.
  • Water overflow controls are sensors for tracking the unit’s water level. The sensor recognizes if the water level gets too high and initiates draining to maintain the balance and prevent overflow.
  • Built-in water softeners can make a significant difference in the longevity and efficiency of your equipment. They can prevent mineral buildup from hard water and improve the unit’s cleaning capabilities since detergents are better dissolved in soft water.
  • Drain pumps and rinse aids are essential to successfully complete a dishwashing cycle. Drain pumps ensure that the dirty water is expelled before the next cycle to not further contaminate the dishes. The rinse aid, an additive released in the final rinse stage, contributes to the drying process. These systems in good condition will ensure you get clean and spotless dishes.

13. Brand Reputation: Research reputable brands for their commercial dishwashers. Brands in the lead in their respective industries have a certain reputation that they’ve earned for being reliable and good. A well-established brand often signifies a commitment to quality, customer satisfaction, and a good support network. You can read and consider customer reviews and feedback to get insight into which brand and model is the best for you.

FAQs About Door-Type Warewashing Machines

What is the typical capacity of door warewashers?

Typical door-type dishwashers can process between 30 to 350 dish and flatware racks per day. This capacity gives them a versatility that makes them suitable for various commercial operations, from smaller establishments to those with moderate to high-volume dishwashing needs.

Are door-type warewashers energy-efficient?

The energy efficiency of door-type warewashers can vary based on the model and specifications. It’s essential to check the energy efficiency ratings provided by the manufacturer. High-efficiency models and those with Energy Star certification are typically designed to minimize energy consumption, providing a more environmentally friendly and cost-effective option over time.

How hot do dishwashers get?

Dishwasher water temperature can range from 120 to 180 °F (48.9 to 82.2°C), depending on the model and the specific cleaning cycle used. For sanitation purposes, the FDA requires food contact surfaces to reach a surface temperature of 160°F (71.11°C).

What certifications should I look for in a commercial dishwasher?

When selecting a commercial dishwasher, meeting health and sanitation standards is crucial. Look for certifications such as NSF International certification or equivalent certifications. These certifications indicate that the dishwasher adheres to industry standards for cleanliness and hygiene.

How often should I clean my commercial dishwasher?

Regular cleaning of your commercial dishwasher is essential to ensure optimal performance. The frequency of cleaning depends on the usage and the type of items being washed. Refer to the dishwasher’s manual or care and maintenance guide for specific instructions on proper cleaning. Regular cleaning helps prevent the buildup of grease and food remnants, maintaining the machine’s efficiency.

How often should I get regular maintenance for my commercial dishwashing machine?

Regular maintenance is crucial to extend the lifespan of your commercial dishwasher and prevent unexpected breakdowns. The frequency of maintenance depends on factors such as usage and manufacturer recommendations. It’s advisable to schedule professional maintenance at least once or twice a year. Regular inspections, cleaning of filters, and addressing any minor issues promptly can significantly contribute to the long-term reliability of the dishwasher.


In conclusion, door-type warewashers offer a convenient, fast, and efficient solution to cleaning our dishes. Their versatile models and settings make them a tailored and valuable addition to any kitchen. From space-saving undercounter models to high-capacity conveyor dishwashers, a door-type warewasher suits every setting, whether a café or a correctional facility.

To make an informed purchase, it is essential to consider several factors like capacity, energy efficiency, safety, and ease of use. Additionally, assessing the specific requirements of your kitchen space and demand will help you select the perfect door-type warewasher to streamline your dishwashing operations. With the right choice, you can invest in your kitchen’s efficiency, hygiene, and overall culinary experience in your establishment.

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