Tankless Water Heater

Best Dishwasher For Tankless Hot Water Heater in 2021 | Reviews & Buying Guide

Rinnai RU130iN 7 GPM


Sio Green SIO18 


Bosch SHP878ZD5N 


Are you looking for the best dishwasher for a tankless hot water heater?  Then first takes a quick look at the numerous advantages of the best tankless water heaters on traditional water heaters.

  • They provide endless ho water on demand and last will about 20-years.
  • They’re highly energy efficient which means you only turn the heater on when you need hot water.
  • No standby or standard energy losses that are associated with storage tankless water heaters.

That’s why modern tankless water heaters are a wonder of technology.  They run cold water through efficient heating elements and heats water to 140-degree F in less than 5 seconds. Although, you can also turn on a faucet or a shower to get hot water immediately. Moreover, tankless water heaters will run as far as long as you want.

Also, read our latest guide about Best Propane Tankless Water Heaters

Best Dishwasher for Tankless water heaters in 2021

So, if you’re looking for a dishwasher with built water heater, then you’re going to love this post. Because in this post, we’ve reviewed dishwasher water heaters including their features, performance, user reviews, pros, and cons.

IMAGE PRODUCT DETAILS
Rinnai RU130iN
  • Energy rating ranges from 15,000 (min) BTU to 130,000 BTU
  • water capacity of 7 GPM
  • 12-months labor warranty
  • water heater uses 40% less energy
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Rinnai RU199iN
  • water flow rate of up to 11 gallons per minute
  • Wifi monitoring
  • Temperature control
  • Highly energy efficient
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Rheem RTEX-18
  • water flow rate of up to 4.4 GPM
  • produces 18kW power
  • LED display
  • Simple installation
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Rheem RTEX-24
  • 5.9 gallons per minute (GPM)
  • self-modulation power control
  • On/Off dial control
  • Easy to install
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Sio Green SIO18
  • Quartz elements
  • saving energy & electricity bills
  • patented technology
  • corrosion-resistant
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Bosch SHP878ZD5N
  • stainless steel
  • Flexible 3rd rack feature
  • USA made product
  • High build quality
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1- Rinnai RU130iN – High-efficiency tankless water heater

Rinnai RU130iN – High-efficiency tankless water heater

As we all know, Rinnai is a very popular brand that manufactures high-efficiency water heaters at affordable prices. This best natural gas tankless water heater uses 40% less energy than traditional water heaters. Moreover, its energy rating ranges from 15,000 (min) BTU to 130,000 BTU (max) and has a water capacity of 7 GPM. We highly recommend this best indoor tankless water heaters.

  • Quality: This point-of-use water heater for the dishwasher is made up of high-quality materials for maximum durability & reliability.
  • Performance: This unit will surely deliver amazing performance as it features Cric-logic technology that allows you to set re-circulations patterns that coincide with your typical habits. And offers endless hot water whenever you need. So, if you’re looking for a high-efficiency natural gas tankless water heater, then you’ve found it!
  • Features: This water heater features a flow rate of up to 7 gallons per minute (GPM) which makes it ideal for large homes. Besides, one of the best thing about this unit is that it offers a 120-months residential warranty, 12-months labor warranty, and 60-months parts warranty.
  • User reviews: This model contains an 82% 5-star rating from its customers.
  • Overall rating: 4.6 out of 5.0
  • Best use: This natural gas tankless water is ideal for large homes and indoor installation.

Pros

  • Easy to install
  • Highly energy efficient
  • Best water heater large homes
  • Warmth
  • Value money

Cons

  • Indoor installation only

2- Rinnai RU199iN – Best indoor tankless water heater

Rinnai RU199iN – Best indoor tankless water heater

Here is another excellent water heater for dishwasher from the house of Rinnai. This highly durable tankless water heater has a hot water flow rate of up to 11 gallons per minute (GPM) making it ideal for whole-house use. It comes with Wifi monitoring to control pre circulation times while allowing you to check the heater’s efficiency from your smartphone or tablet.

  • Quality: This tankless water heater for dishwasher is made up of premium quality for great durability & flexibility.
  • Performance: This unit will not disappoint you in any way. As it is equipped with Therma Cric360 technology that recirculates hot water through the home’s pipelines to ensure that you won’t have to wait for hot water after turning on the faucet. Moreover, it’s highly-efficient condensing unit re-cycles hot exhaust gasses through its system to reduce energy waster & utility bills.
  • Features: This best condensing tankless water heater features a hot water flow rate of up to 11 GPM and an energy rating of up to 199,000 BTU (max) to 15,000 BTU (min). So, you don’t need to choose between running a load of laundry or taking a long streamy shower.
  • User reviews: This unit contains an 82% 5-star rating from its customers.
  • Overall rating: 4.6 out of 5.0
  • Best use: This best tankless water heater for hard water is ideal for large homes, indoor use, and commercial use.

Pros

  • Easy to install
  • Highly energy efficient
  • Flow rate
  • Temperature control
  • Warmth
  • Worth money

Cons

  • Expensive

3- Rheem RTEX-18 – best electric tankless water under $500

Rheem RTEX-18 – best electric tankless water under $500

Rheem is also a very well-known water heaters manufacturer company that offers one of the best, high-quality, and affordable units to their loyal customers. If you’ve a small family or household and not many hot water heaters needed, then you don’t need to spend $1000 on a high-end or big tankless water heater. Because small instant hot water tankless water heater with easy installation should do just fine.

  • Quality: This affordable instant hot water heater has ergonomic, compact, and lightweight which means you can easily hang it on the wall or place it on the floor on the floor as well.
  • Performance: This cheap dishwasher is equipped with advanced self-modulation technology that adjusts the power to meet hot water demand. It produces 18kW power that can easily provide a flow hot water flow rate of up to 4.4 GPM which is ideal for ideal small households. So, if you’re looking for the best tankless water heater for hard water, then you’ve found it!
  • Features: This instant hot water heater for dishwasher features a digital thermostat to control the temperature. It also features with LED display to keep an eye on the temperature.
  • User reviews: This unit contains a 78% 5-star rating from its customers.
  • Overall rating: 4.5 out o 5.0
  • Best use: This model is ideal for small families & households.

Pros

  • Simple installation
  • Temperature control
  • Warmth
  • LED display
  • Affordable price
  • Value for money
  • Energy efficient

Cons

  • Nit suitable for large homes

4- Rheem RTEX-24 – electric tankless water heater

Rheem RTEX-24

Here is another excellent unit from the house of Rheem. This power water heater has a hot water flow rate of up to 5.9 gallons per minute (GPM). This unit will surely provide you endless hot water on demand. We highly recommend this affordable electric tankless water heater.

  • Quality: This unit has an ergonomic, compact, and lightweight design that allows you to take it wherever you want. Due to its compact & lightweight design, you can hang it on the wall or place it on the floor as well.
  • Performance: This device will deliver excellent performance as it is equipped with self-modulation power control and NPT water connection for added durability & flexibility. So, if you’re looking for compact water from a well-known brand, then you’ve found it!
  • Features: This water heater features with On/Off dial control and LED temperature display to keep an eye on the temperature. Moreover, it is easy to install which means you don’t have to pay extra charges for a plumber.
  • User reviews: This unit contains a 74% 5-star rating from verified customers.
  • Overall rating: This unit best for 3 family use, kitchen, and outdoor purposes.

Pros

  • Easy to install
  • Warmth
  • Energy efficient
  • Temperature control
  • Affordable price

Cons

  • Tech support

5- Sio Green SIO18 – Best commercial tankless water heater

Sio Green SIO18 – Best commercial tankless water heater

This model for Sio Green is a unique tankless water heater. You might even say that it is a next-Gen water heater. Like both electric & gas water heaters heat up metallic parts of the heat exchanger to produce endless hot water on demand. Sio Green uses Quartz elements and infrared technology to do the same. That’s we highly-recommend this infrared tankless water under $1000.

  • Quality: This electric tankless water heater has a sleek & attractive design which makes it a top-notch choice for many house owners.
  • Performance: This unit is equipped with automatic power technology allowing you to easily tailor its performance according to your family needs and saving energy & electricity bills. However, if you’re not satisfied with its performance, then you can return within 30-days. So, if you’re looking for a decent dishwasher, then you might consider this one!
  • Features: This compact tankless water heater features patented technology, no coil elements, corrosion-resistant, and need no maintenance. These features make it perfect for your bathroom, kitchen, and cabinets.
  • User reviews: This heater contains a 74% 5-star rating from its customers,
  • Overall rating: 4.4 out of 5.0
  • Best use: This infrared water heater is best for dishwashing, bathing, and kitchen use.

Pros

  • Easy to install
  • Temperature control
  • Tech support
  • Value for money

Cons

  • Expensive

6- Bosch SHP878ZD5N – bosch dishwasher

 Bosch SHP878ZD5N – bosch dishwasher

If you’re looking for a durable dishwasher, then bosch has got you covered. This unit comes with several spin & wash cycles, and advanced technologies. It is available in black, white, and stainless steel finishes allowing you to choose the color that matches your kitchen.

  • Quality: It is engineered to the highest standard. Every bosch dishwasher tankless water heater undergoes 485 quality tests. So, that they can deliver you can count on.
  • Performance: Its advanced technologies eliminate then need to pre-rinse dishes. It also comes with some speed cycles & cleaning modes to choose from. So, pick the option that matches your needs. Moreover, it also comes with smartphone alerts allowing you to control & monitor the dishwasher.
  • Features: This point-of-use water heater for dishwasher features intelligent scanners to determine soil levels. This model automatically adjusts to suit the load. So, no matter how dirty your dishes are. Furthermore, it also comes with built-in spray arms to reach stuck on food ensuring you that your dishes will come out sparkling every time.
  • User reviews: This unit contains a 73% 5-star rating from its customers.
  • Overall rating: 4.3 out of 5.0
  • Best use: This model from bosch is ideal for your kitchen.

Pros

  • High build quality
  • USA made product
  • Flexible 3rd rack feature
  • Available in different colors

Cons

  • Large in size

Best Dishwasher for Tankless Water Heater in 2021

As we promise, here is the buying guide for the best dishwasher for the tankless water heater. By going through this guide, you’re able to make a good decision.

What is a tankless water heater?

A tankless water heater takes less space than storage water heaters. They heat water directly. When you turn the heater to turn on, the cold water runs through the pipe and into the tankless water heater, where it is heated by a gas burner or electric element. This allows you a consistent supply of warm water.

Advantage of Tankless Water Heater:

  • They use 40-50% less energy than storage water heaters.
  • The unit will only heat water when you turn it on
  • They provide endless hot water on demand which is ideal for filling a tub.
  • They’re durable, compact & light in weight.

Disadvantages of Tankless Water Heaters:

  • They’re expensive as compared to storage water heaters.
  • If you buy a small tankless water heater, then it won’t be able to produce enough hot water to serve several households or bathrooms.

Electric Vs Gas Water heaters

The main difference between the electric tankless water heater and gas tankless water heaters is their efficiency. Electric tankless water heaters are 98% more efficient. Whereas, gas tankless water heaters are 80-85% energy efficient.

Electric Tankless Water Heaters

Electric tankless water heaters are more energy-efficient than a gas tankless water heater. But keep this thing in mind that, an electric heater can consume a lot of electricity. For example, a whole house tankless water heater can use more than 25,000W of electricity as compared to 5,000W of a conventional water heater.

Gas Tankless Water Heaters:

These heaters will last longer than storage water heaters and safer than conventional water heaters. However, one disadvantage is that, if there’s scale build-up, a tankless water heater can automatically shut off.

Factors to consider before buying Dishwasher for Tankless Water heater

Here are some factors to consider before buying the best dishwasher for tankless water heater.

Propane or Natural Gas:

For many house owners, a natural gas tankless water heater is a perfect option. Because natural gas is often supplied by utility company via gas lines, or directly into the home. Moreover, natural gas is more affordable than propane.

However, propane is often the only type of gas available in ruler areas and those who live off-grid. If this applies to you, look for a tankless water heater that accommodates propane gas.

Indoor or outdoor:

In most countries, where temperature dip below freezing, then it’s not recommended to install an outdoor tankless water heater. Because cold temperature will reduce its efficiency and could even freeze the heater. Outdoor water heaters are only suitable if you’re a camper. Therefore, it is recommended to always go for an indoor tankless water heater.

Flow rate:

Sizing a tankless water heater is an important factor because it will determine whether you’ll have sufficient hot water for all your needs. Tankless water heaters are rated by gallons per minute. So, if you’ve got a large family or house, then you should go for a heater with a high flow rate.

Conclusion:

We think that Rinnai RU130iN is the best dishwasher for tankless water heater in 2021. As it features an energy rating of up to 130,000 and a hot water flow rate of up to 7GPM making it ideal for large home & commercial use.

second, we’ve got Rinnai RU199iN, this unit has an energy rating of up to 199,000 BTU and a hot flow rate of up to 11GPM.  It also features ThermaCric 360 technology that allows you to set recirculation patterns.

last but not the least, we’ve Rheem RTEX-18, this best tankless water heater under $500 features with LED display, adjustable thermostat, and offers a hot water flow rate of up to 4.4GPM. Besides, it also features self-modulation technology that adjusts power to meet hot water demand.

Frequently Asked Questions About Best Dishwasher for Tankless Water Heater

Which is the best dishwasher for tankless water heater?
  • Rinnai RU130iN
  • Rinnai RU199iN
  • Rheem RTEX-18
  • Rheem RTEX-24
  • Sio Green SIO18
  • Bosch SHP878ZD5N
What brand of dishwasher is the best?
  • Bosch
  • Rheem
  • Rinnai
Is it more water-efficient to use a dishwasher?

The Department of Energy sets a standard that a full-size dishwasher can use more than 5 Gallons per Cycle. While a compact dishwasher no more than 3.5 Gallons.

Is it more efficient to wash dishes by hand or dishwasher?

If you have a dishwasher, then put down the sponge. It may feel virtuous to wash by hand, but it is actually more wasteful. Because you can use up to 27 gallons of water by hands, while 3 gallons with a decent dishwasher.

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