Bosch Water Heaters:
What to Look For

The Bosch brand of water heaters is renowned for its superior quality, dependable engineering, and tankless technology, which are extensively utilized in residential and commercial water heating applications.

Are you experiencing a shortage of hot water at home? If so, it might be the right moment to consider switching to a tankless water heater, especially from the Bosch brand.

Bosch's gas and electric tankless water heaters provide an affordable solution and an uninterrupted supply of hot water.

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Bosch water heaters: Things to consider

The hot water group is part of the superb heating system within Bosch Thermotechnik GmbH, a leading international manufacturer of gas and electric heating products. Check out the best electric and gas-condensing water heaters.

The most popular Bosch tankless water heaters are powered by natural and propane gas and use condensing technology.

The company also offers small tankless electric models, point-of-use tank-type, and gas boilers for residential and commercial use.

Gas tankless water heaters

Bosch gas tankless water heaterBosch gas tankless

Bosch tankless water heaters employ heat exchangers to heat water on demand, ensuring a constant and infinite supply of hot water in an energy-efficient manner. As a result, there are no more situations of running out of hot water during peak usage periods when multiple fixtures are in use.

Thanks to their tankless design, Bosch water heaters are compact and take up minimal space, as they are mounted on walls, freeing up valuable floor space for other purposes while also simplifying installation.

Because the heating process only takes place when there is a call for hot water, and due to the ultra-high efficiency of condensing models, tankless heaters are more energy and water-efficient, with a lower environmental impact.

Bosch offers two types of tankless water heaters: the Therm and Greentherm series, which are available in condensing and non-condensing versions, as well as ultra-efficient and high-efficiency models. They are designed for indoor and outdoor installation.

Bosch Greentherm 9000 series

Bosch 9000 tankless and condensing water heaterBosch 9000 tankless and condensing water heater (photo: bosch)

The best Bosch water heaters come from the condensing group, represented by the Greentherm 9000 series and its seven powerful models.

As these models come with different water flows and high energy efficiencies, they can be used in various applications, from small to large homes. And for those who do not have natural gas, don't worry; they can be converted to propane. Once converted to propane tankless models, they will still deliver a lot of power with an unlimited hot water supply.

Operating with tankless and condensing technology, all the models from the 9000 series will deliver ultra-efficient water heating with UEF up to 0.96, which ensures very low energy waste and great savings.

As opposed to other brands, Greentherm 9000 tankless water heaters are equipped with top water connections, integrated drain ports, and sensor technology with auto calibration, working together to allow easy tank replacement, saving you time and money.

And thanks to the integrated Wi-Fi control and availability of the mobile app, tankless owners can remotely check and control water temperature, usage, heating mode, and diagnostics.

Homeowners will enjoy a 15-year warranty on its main part - the heat exchanger, and 5 years on other components.

Bosch Therm series

Bosch tankless water heaters are available as the mid-efficient Therm 940 ES and 830 ES models, where the former is used for demanding homes and the latter for smaller builds. If the demand for hot water is high, users have the option to use an intelligent cascading system where up to 24 units can be connected into one system and produce much more power and hot water.

Contrary to the Greentherm 9000 series, tankless water heaters from the Bosch Therm series are non-condensing and have "only" 0.82 UEF. Because of that, they are not Energy Star approved but are ultra-low NOx certified, making them environmentally friendly.

While they are designed for indoor use, homeowners can use a vent kit and install it outdoors as well.

The units are equipped with automated and fully modulating bypass to provide a stable and accurate temperature of the outgoing hot water.

All tankless water heaters come with a limited warranty of 15 years on heat exchangers.

Residential electric water heaters

Bosch WH17 electric water heaterBosch WH17

Bosch water heaters are also designed as electric, small tank, and tankless for point-of-use applications and whole-house use, such as the tankless with high power.

If you need a compact and lightweight model for under-sink installation and a single fixture, use an electric tankless water heater from the Tronic 3000 or 4000 series. These are very simple devices with 98% energy efficiency and almost no heat loss.

For the whole-house water heating and more features, homeowners have options to get an electric model from the Tronic 6000 or 6100 series, which has a built-in water filter and thermostatic modulation for a steady temperature output.

Gas boilers

Bosch gas boilers are available as the Greenstar and Buderus condensing and Singular combi boilers.

Greenstar boilers are available in both heat-only and combi versions, and depending on the installation feasibility, they can be installed on the wall or standing on the floor.

Buderus condensing boilers can be connected into the system with up to 8 units making them ideal for use in large homes and commercial builds. They are very powerful units as they come with a heating capacity of up to 300,000 BTU.

Singular combi boilers, with a 10-year warranty and 95% energy efficiency are cost-effective solution for reliable space and water heating in residential applications.

Condensing models are recommended to buy due to their excellent efficiency (over 90%), low operating costs, energy savings, lower pollution, and consistent comfort.

For homeowners who prefer boilers over water heaters, Greenstar boilers are a good choice. The reasons are numerous and include advantages such as compact size, condensing technology, and flexible installation.

These boilers can be installed either on the wall or the floor, including a cascade setup. They offer combined space and potable water heating, superior efficiency, and a limited lifetime warranty on the heat exchanger.

This group carries the reward being the most efficient in 2016.

About Bosch

  • In 1886, Robert Bosch founded the "Workshops for Precision Engineering and Electrical Engineering" in Stuttgart, Germany.
  • In 1906 Bosch established its first US subsidiary, and the Canadian office was opened in Montreal in 1954.
  • Bosch Thermotechnik includes popular brands like Bosch, Buderus, and Junkers. Bosch tankless water heaters have been present on the market for over 60 years.

Bosch is a great company with over 125 years of experience in water heating, including more than 25 years in highly efficient condensing heating. Their water heaters cover different applications and support various systems, such as residential and commercial water heating, recirculation systems, and solar.

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