Guide: How To Buy A Commercial Dishwasher

Buying the right commercial dishwasher for your business is not a simple thing. There are several factors that you need to put into consideration to ensure that you are purchasing the right machine. You don’t want to invest in a piece appliance only to realise it is too small for your business or vice versa.

If you are planning to go to the market for a commercial dishwasher, we’ve rounded up top 7 considerations for buying commercial dishwashers that suit your needs. Here is our guide on how to buy commercial dishwashers.

Size and Capacity

The first and most obvious factor to consider is the size and the capacity of the commercial dishwasher. Buy a machine that can handle the workload in your kitchen and fit in the kitchen perfectly. So the external dimensions of the dishwasher are very crucial when it comes to size and maximum space utilisation. On the capacity, check the number of glass dishwasher racks it can clean in one hour. So before you begin your search, first consider the size based on the space and then the workload that the dishwasher will be handling.

Types of Dish Racks

effective commercial dishwasherDish racks maximise the effectiveness of cleaning dishes. That’s why they are an important factor to consider when buying commercial dishwashers. However, picking the right rack option can be tricky due to the vast range of varieties in the market. Some of the most common types of racks include peg racks, flat racks, full & half size, glass racks, and cup racks. Some have close-set tines that are perfect for more plates and bowls while the spread tines accommodate larger dishes and pots.

If you are washing glasses using the machines, you might need tacks with fold-down tines to lock in glasses. So when buying commercial dishwashers, make sure that the racks can accommodate all the dishes you will be cleaning. However, for those looking for an efficient and more flexible machine, you should consider buying a dishwasher with interchangeable racks.

Types of Dishwashers

It is important to know the type of dishwasher that will work for your commercial kitchen. There are several types of dishwashers that you can pick from. Here are five types of dishwashers that are popular in the market.

Undercounter Dishwashers

Their compact sizes make them perfect for bars and small kitchens. So if you are expecting to wash a small number of dishes, then this is the ideal machine for you. They make use of a single front-facing door and can handle up to about 25 racks per hour. That’s why they are perfect for small kitchens.

Conveyor Dishwashers

These types of commercial dishwashers are perfect for high volume cleaning. So if you need a machine to handle hospitals, cafeterias, schools, and other large institutions, conveyor version is the best option. The dishwasher uses a mechanical conveyor belt to transport racks through the machine. A good conveyor dishwasher can wash up to 400 racks in an hour. That’s how powerful it is.

Door-Type Dishwasher

door type commercial dishwasherThis is one of the popular types of commercial dishwashers. The dishwasher has doors that slide up and down for racks to move in and out easily and quickly. They are also known as rack dishwashers. They are mostly designed for a middle-size kitchen where undercounter type is too small, and the conveyor type is too large. Their capacity is about 80 racks per hour which is a pretty cool speed for most restaurants.

Glass Dishwashers

These types of dishwashers excel in washing delicate stemware such as wine glasses and other drink ware. If you are looking for a dishwasher for your bar, then this would be a perfect option.

Low and High-Temperature Dishwashers

A dishwasher either uses low or high temperature to sanitise dishes. So the choice is just a matter of preference. For the high-temperature dishwashers, they utilise high heat of around 180° F for sanitisation. However, you might need to buy a heater booster if the machine cannot meet this temperature.

For the low-temperature types of dishwashers, they use a chemical to sanitise the dishes. They have a lower running cost since the cost of heating is reduced. However, you will have a problem with cleaning grease-laden dishware.

Check The Drain Pump

One of the biggest problems with using dishwashers is draining dirty water from the machine. In cases where the drain is higher than the position of the machine, you need to have a mechanism of pumping the dirty water. Otherwise, you will have a big problem with wastewater management. So when selecting a commercial dishwasher, you need to check it has a drain pump before buying. You don’t want to undergo another cost of buying these pumps separately.

Water Filters

energy efficient commercial dishwasherThe other thing that you need to check when selecting a commercial dishwasher is whether it has a water filter system. The importance of water filters is to remove harmful contaminants, minerals, and sediment in the water. Otherwise, you might have a problem of sediment build-up in the machine and eventually damaging it. Water filters also help improves the lifespan of the dishwasher. So they are some of the crucial dishwasher accessories that you need to check while buying commercial dishwashers.


The noise factor is something that most commercial dishwashers forget to check, but it’s crucial. The fact is that these machines make a lot of noise- the bigger the machine, the louder is the noise. Whereas the noise is not an issue, it can affect your job, especially if it is a small restaurant. So check the decibel rating of the machine before buying. If you are buying commercial dishwashers for the first, seek professional advice from dishwasher specialist on the best decibel rating for your business.

Energy Efficiency

Last but not least is the energy efficiency of the dishwasher. It would be unfortunate to buy a machine only to realise that it has poor energy efficiency. That means a high cost of energy and short lifespan. Checking the Energy Star rating by a government agency to know the best machine. Go for the highest energy efficiency as it will help you cut electricity bills in the long run.

A dishwasher is a huge investment and so be sure that you are buying the right one. Go for quality and not for cheap models. In addition, go for a commercial dishwasher that offers a lifespan of 10-15 years. That’s how you get value for money.

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