Bosch Tankless Water Heater

Bosch tankless water heaters will allow you to enjoy a hot water bath in the winter season, seamlessly without the need for the traditional storage heater. It’s one of the best options to provide your loved ones with  convenient, hassle-free and easy to use hot water wherever and whenever you need.

These heaters will help you save space and money, and  have become a necessity for homeowners to investigate when they are considering updating to a smarter technology lifestyle. These Bosch tankless water heaters are long-lasting, durable, efficient and a reliable source of hot water.

Bosch's Global Reach

Bosch is one of the largest companies in the world and are pioneers in the automotive, industrial, construction, and home improvement products categories. Bosch has built its reputation in the past 134 years since being established in 1886 in Stuttgart, Germany.

Today it has its empire in 150 countries as its number of subsidiaries is 440 all around the world.

From automotive to artificial intelligence, Bosch has captured every technological aspect of the market and provides products including power tools, communication, and control systems, packaging products, electrical and thermal technology, household applications including heat exchangers, boilers, water heaters, software and a lot more.

Bosch has traveled all across the world including America, Canada, Mexico, London, and over 150 countries of the world providing technological solutions to the consumers and wonderful careers and growth to its employees.

A Little About Bosch Tankless Water Heaters

In thermo technology, Bosch provides consumer goods that cater almost everything regarding home appliances including Bosch tankless water heaters, boilers that stand on the floor and can be mounted on walls, air-source systems, geothermal, water source systems with all the accessories and product lines.

Bosch tankless water heaters can either be purchased as gas water heaters or electric water heaters. These tankless water heaters can either provide hot water to both the whole house and at point of use.

The Bosch name has become a globally recognized brand, because of its advanced technology, while also producing products that are economical, comfort solutions in the modern era.

Bosch Tankless Water Heater Reviews

Below you will find some reviews of Bosch tankless water heaters where we will point out the positives and negatives we feel are relevant for you to assist in your quest for updating your homes water heater. Our reviews are not created in a vacuum, we review comments from owners that have submitted their approval or displeasure with a product, again to better assist you in making an informed decision when looking to purchase a tankless water heater. 

These heaters are not only energy-efficient, but they also have compact designs, are aesthetically pleasing, and they will help you save on either your electric or gas bills. 

Although, this is not a tankless water heater we decided to include a review of it since this very small, efficient and affordable point-of-use tank water heater could be a wise supplement to a tank water heater should you decide to go that route. 

This Bosch Electric Mini-Tank Water Heater can fit in narrow spaces and is a  mini wonder at turning cold water hot. 

You can use the tank either vertically or horizontally as there are no directional restrictions of usage. Moreover, it is so easy and convenient to handle that you can get the benefits of it either by hanging it on the wall (the package includes the bracket) or by setting it up on the floor.

The portable design of this Bosch water heater makes it super easy to install anywhere you want; under the sink, in a cabinet, under a shelf, or any place of your choosing that has a need for quick heated water. No need to wait for hot water as it is ready to serve you when hot water is needed. 




For those of us who don’t like to wait, this Bosch on-demand water heater is a wise choice for a tankless water heaters due to its efficiency. It provides a steady, fast, and quick supply of hot water with the help of a dual-chambered copper heat exchanger.

The versatility of installation makes it highly attractive and it can be mounted on the wall in any direction. This point of use Bosch water tank can be used in narrow spaces like under the sink of kitchens or bathrooms, offices, or any commercial use. 

This tankless water heater is designed in a way that does not look out of sorts with the decor of your space either, whether it’s a kitchen, washroom, or your office, this appliance will not stick out like a sore thumb.

You need a professional person to install it due to it requiring proper hardwiring.

As it eliminates the need for expensive plumbing, supplies water exactly where it is needed, and has a 98% thermal-efficiency rating it has many economical benefits and should be on your list to consider for tankless water heaters.




This Bosch Electric Tankless Water Heater is one of those water heaters that can supply continuous hot water without any interruption. It has the capability to provide an infinite water supply, a need for homes that have big families.

With a simple and sophisticated design it can virtually fit any kind of interior decors if it’s needed to be installed in the open. No other water heater will provide stability and control of temperature like this. 

As it has external knobs to control and manage temperature requirements as needed, this Bosch hot water heater provides an unlimited source of hot water as long as it’s required.

The structure of this tankless water heater is fully optimized with polymer encased elements and built-in flow sensors that regulate and control a consistent temperature of the water.

This control feature helps you go fearless about the use of water and even kids will be able to have a hot bath which many tankless water heaters have trouble claiming. 




This Bosch Gas Tankless Water Heater uses gas as its primary fuel to heat up the water. Having a smart design makes it a fit for indoor water heating and the unit can be adjusted anywhere vertically, with the help of a plumber installing.

It is user-friendly which is a big plus, because of the touch screen panel that controls many factors, including water supply and temperature control.

Natural gas is the main source of fuel to heat the water and that’s why it is installed with a gas supply.

Bosch does not provide any warranty or technical support if it is not mounted with the help of professional personnel. So in order to qualify all benefits, a monitored installation is necessary.

If you want to convert it into a propane gas fuel system, you just need to use a propane conversion kit to get the desired results. The only requirement is a gas analyzer to convert it to Bosch Propane Tankless Water Heater 

The versatility, user-friendliness and high thermal-efficiency make it the desired product for all of us who want to have a Bosch Gas tankless water heater installed in our homes.




This Bosch Gas Tankless Water Heater also uses natural gas as a fuel while the primary ignition is electric and serves as an outdoor waterless tank.

The sophisticated and compact design is space-saving and has the ability to supply an endless stream of hot water for the whole family on demand.

It comes with a touch screen panel having a wi-fi option and can control many factors that you can easily control through its app.

The Bosch gas tankless water heater includes an LP conversion kit and with the help of an analyzer, it can easily be converted into a Bosch Propane tankless water heater.

This unit is primarily made to serve your outdoor services so it does not need a vent kit, minimizing your maintenance cost.




Bosch Tankless Water Heater Problems

While you have a Bosch tankless water heater at home, you must know the problems that may come your way. As there is nothing 100% efficient so knowing the problem can help you figure out what is the issue and how to handle it.

Considering that the electricity, installation, quality of water, and other important perimeters including voltage, water connections or fuels are as per standard, you could have the following problems in Bosch tankless water heaters:

  • Water becomes too hot
  • Water does not get hot
  • Ignition problem
  • Flame intensity problem
  • Clogging/scaling of the heating coil
  • Temperature fluctuations

Bosch tankless water heater troubleshooting really depends upon the type of problem you come across. Certain problems can be solved just by reading and following the instructions in the manual.

Bosch also provides a warranty for many parts and types of troubleshooting. You should always contact the customer care department to speak and inquire about what’s covered under the warranty.

Bosch Tankless Water Heater Pilot Light Problems

Bosch tankless water heater pilot light problems are a major issue that many customers face. A clear guideline can help them do troubleshooting on their own.

A few common Bosch tankless water heater pilot problems include…

If The Pilot Does Not Light

Check whether the gas supply is on natural gas or propane gas. If the gas is on and the pilot is still not lighting up, you may have low pressure  and it should be checked. Choking of the gas inlet may also be another factor that might need cleaning.

Pilot Lights But Turns Off As Soon As The Press Button Is Released

When you turn on the pilot and press the button, make sure you hold it for nearly 20-seconds. See if the problem persists or not, make sure the flame color is blue and the thermocouple is fully engulfed in the flame. Call a licensed technician to get the problem solved if pressing it for 20-seconds does not work for you.

Burner Lights Up Fully But Hot Water Does Not Flow

In this case, do a thorough cleaning of all the valves and pipes. Sometimes clogging of the pipes does not let the water flow properly. Carry out a regular cleaning practice.

See the manual for a complete detailed procedure. Make sure to have a thorough study of the manual to see all kinds of problems and the solutions.

All above-mentioned problems are basic problems you may face right after the installation of your heater

Bosch Tankless Water Heater Manual

Every Bosch tankless water heater comes with its original manual. The manual has all the instructions in it including installation techniques, prerequisites, troubleshooting, maintenance, and a guideline/information on all the parts. If your unit did not come with a manual, you can search for your unit here and download the manual.

Bosch Tankless Water Heater Parts

Bosch tankless water heater parts are very important in terms of troubleshooting and proper installation. Make sure you go through all the instructions in the manual and see the diagrams of these parts properly. If you ignore the recognition and understanding of these parts, troubleshooting and diagnosing the problem can become difficult for you.

Tankless Water Heater FAQs

How many amps do average electric tankless water heaters need?

Usually, an average electric tankless heater needs 120 amps to be operational. A typical house has a total capacity of 200 amps which means an up-grade may be required i to deal with larger loads.

How many years do tankless water heaters last?

In most of the cases, tankless water heaters last 20 years or more. On the other hand heaters with tanks have a life expectancy of 10 to 15 years. Moreover, almost all the parts of Bosch tankless water heaters are replaceable and Bosch also provides a warranty of 1 year to 20 years on many parts of tankless water heaters.

Are water softeners bad for tankless water heaters?

Using hard water can be detrimental to your tankless water heaters as they deposit minerals on heating coils that result in the lockout of the heater. As the tankless water heaters have the largest life spans, using water softeners can actually save your tankless water heaters from any kind of bad effects caused by hard water.

How often should you flush your tankless water heater?

If you are using water softeners properly or your quality of water is of superior quality, you should flush your tankless water heater annually. On the other hand, if you have poor quality water or hard water running through your tankless heater, then it should be thoroughly cleaned 2 to 3 times a year. It saves your tankless water heater and in the long run can save you money on your investment!