Bosch Tankless Water Heaters Reviews

So, we’ve included a ton of Bosch tankless water heaters in our reviews. We thought it was time to introduce you guys to the brand!

Bosch is a German company headquartered in Gerlingen, Germany. They were established in 1886 by Robert Bosch, and they’ve been making quality product ever since. Bosch has been a leader in the water heating industry. They are known for their innovation, efficiency, reliability, and quality of work.

>>Shop for Bosch Tankless water heaters on Amazon.com<<

General Thoughts on Bosch Tankless Water Heaters

Bosch is one of the largest manufacturer of home appliances in Europe and one of the leading companies in the sector worldwide. Bosch comprises more than 350 subsidiary companies. Their Thermotechnology division supplies high-quality heating, AC and water heating solutions including on demand water heaters, heat pump water heaters, wall-hung boilers, solar thermal systems and more.

Bosch offers a wide range of point-of-use and on demand water heaters for a variety of commercial and residential applications. Their on demand water heaters are reasonably priced. They are also energy efficient. Most of them qualify for a federal tax credit of up to 30%. Combine that with their high energy efficiency rating and you get a solid tankless water heater that’s set to deliver endless hot water for many years to come.

Bosch tankless water heaters are designed and built from the ground up with high quality in mind. They’re estimated to last up to 20 years. That’s quite impressive, and it’s almost twice conventional water heaters that last an average of 6-12 years. With that being said, these on-demand water heater will pay for themselves in energy savings over time.

Bosch gas tankless water heaters are the product of over a century of innovation and technical refinement. Nowadays, Bosch has become one of the leaders in the industry of water heating units. Bosch likes to brag about its new patented heat burner design which allows for unsurpassed efficiency and durability.

Why choose a Bosch on demand water heater?

Unlike conventional water heaters that keep heating water 24-hours a day, 7 days a week, even when there’s no demand, Bosch tankless water heaters only heat water when there’s a demand for hot water – for example when the hot water tap is turned on in the shower or in the kitchen. This makes them the most energy efficient appliances that you can rely on to provide you with endless hot water, while keeping your energy bill low.

Bosch on demand water heaters are very energy-efficient. They can save you up 40% of your energy costs. That’s almost half your utility bill. The downside, however, is the hefty upfront investment. Most tankless water heaters out there are quite expensive. However, if you buy the right one, it will pay for itself in energy savings over time. Additionally, many of them qualify for a federal tax credit worth up to 30%.

Bosch Tankless Water Heaters Reviews

Bosch C 950 ES NG Greentherm Review

Bosch C 950 ES NG on demand water heater reviewThis is one of the best tankless water heaters that Bosch has to offer. It’s one of the most efficient model in Bosch’s Therm line of gas tankless water heaters.

The Bosch Greentherm model C 950 ES water heater is a high-efficiency, fully-condensing appliance. It has an Energy Factor of 0.95. And it’s equipped with an automated and fully modulating bypass for unsurpassed domestic home water temperature stability. All Greentherm models including Bosch C 950 ES NG, use condensing technology which makes for lower consumptions, high performance, and low emission of toxic pollutants to the environment. Unlike tank water heaters, a condensing unit captures latent heat of the flue gases and uses it to preheat the incoming cold water, which boosts the efficiency of the water heater by approximately 10%.

Bosch C 950 ES NG is rated for 9.2 GPM at 35°F, and 6 GPM at 55°F,thereby, it’s capable of fulfilling the needs for hot water of a relatively large family living in a medium sized home with multiple showers. It has a temperature range from 100-140°F.

This 175,000 BTU water heater is designed for residential and commercial applications. It can be installed either indoor or outdoor. It features an electronic ignition system and can vent through either 3 inch or 4 inch diameter PVC vent pipe either through the side wall or up through the roof. It’s approved for use with 1/2″ gas line, making tank retrofit more affordable.This heater comes with built-in freeze protection and a water filter that is externally accessible, but does not come with a pressure relief valve (PRV).

As for cons, it’s really difficult to think of any, if anything I’d say that this unit is quite expensive. However, assuming you’ve got the cash to throw around, it’s one of the highest quality tankless water your can buy.

Bosch C 950 ES NG Specifications :
  • Dimensions : 30.5 x 17.875 x 11.25
  • Flow Rate
    • @ 35 F Rise : 9.4 GPM
    • @ 45 F Rise : 7.3 GPM
    • @ 55 F Rise : 6 GPM
  • Maximum Input (BTUs)  : 175000
  • Minimum Input (BTUs)  : 19900
  • Temperature Range (Deg F) : 100°F – 140°F
  • Energy Factor : 0.95

Bosch 940 ESO NG Therm Review

Bosch 940 ES NG Therm Outdoor on deman Water Heater reviewBosch 940 ESO NG is one of Bosch’s best non-condensing natural gas on demand water heater. It’s another pricey one, but again, it’s very well-engineered and would be a great buy for anyone who’s looking for a solid water heater that can provide endless hot water even during the busiest usage period (peak demand).

So what’s so special about this bad boy? First of all, like many high-end tankless water heaters, the Bosch 940 ES NG is Energy Star certified. It’s best suited for both residential and commercial applications. It’s rated for 7.3 GPM at 45 °F. Although this is a non-condensing water heater, it still mantains a 83% thermal efficiency with a 0.83 energy factor. Thanks to its sealed combustion and dual-fan technology, the Bosch 940 ES NG can be mounted almost anywhere, and can be vented either through the side wall or up through the roof.

This water heater unit is equipped with a built-in freeze protection and a water filter. It also features an electronic ignition system. Bosch 940 ES series of tankless water heaters come in natural gas and liquid propane versions. Both models have the same specifications.

Bosch 940 ESO NG Specifications 
  • Dimensions : 17.78″ x 30 1/2″” x 11 1/4″”
  • Flow Rate
    • @ 35 F Rise   : 9.4 GPM
    • @ 45 F Rise   : 7.3 GPM
    • @ 55 F Rise   : 6.0 GPM
  • Max Input (BTU) : 199,000
  • Min Input (BTU) : 19,900
  • Min Flow Rate     : 0.50 GPM
  • Temperature Range : 100 °F – 140 °F
  • Energy Factor : .83
  • Thermal Efficiency : 83%

Bosch 5000 WH27 Tronic Review

Bosch Tronic 5000 WH27 electric on demand water heater reviewThe Bosch WH27 Tronic is one of the best Bosch electric tankless water heater. It’s a compact unit that can be installed virtually anywhere inside the home. It’s an ideal cost-effective water heater for single or couples living in an appartment. That said, if you’re looking for a  compact space-saving water heater unit that doesn’t cost an arm and a leg, then the Bosch WH27 Tronic is worth considering. It’s one of the most reasonably priced electric tankless water heaters that Bosch has to offer.

The Bosch WH27 Tronic is a very well-engineered water heater designed to replace a 40-gallon electric tank. It’s Energy Star rated and has 97% efficiency with zero stand-by loss.

This water heater unit is equipped with a solid copper heat exchanger, a water flow sensor and Element modulation to ensure a constant output temperature. Additionally, its thermal cut-out switch provides an excellent safety measure and ensures that the heating elements will not need replacement.

Bosch Tronic 5000 WH27 Specifications
  • Dimensions : 12.5″ x 15.25″ x 4.5″
  • Flow Rate
    • @ 45 F Rise   :  4.0 GPM
    • @ 60 F Rise   :  3.0 GPM
    • @ 70 F Rise   :  2.6 GPM
  • Thermal Efficiency :  97%
  • Temperature range :  95°F – 131°F

Bosch 330 PN Series Review

Bosch 330 PN series tankless water heater Review
You may be asking yourself what this tankless water heater is doing on the list. It’s clearly outclassed by most of the other top 5. So why did we list it? Price. It can be surprisingly difficult to find a decent tankless water heater that won’t totally break the bank. The Bosch 330 PN series of tankless water heaters get the job done for less than $400. Bosch 330 PN series comes in propane and natural gas, with the natural gas version (Bosch 330 PN NG) being the cheapest. It’s one of the best tankless water heaters at this price point, and it’s a good entry-level water heater unit if you want to test the waters before upgrading to something a little more sophisticated.

Bosch 330 PN Specifications 
  • Dimensions :  22.83 x 12.20 x 8.66
  • Max Input (BTU) : 74,900
  • Min Input (BTU) : 23,906
  • Flow Rate 
    • @ 35°F Rise   :  3.3 GPM
    • @ 55°F Rise   :  2.1 GPM
  • Min Flow Rate :  0.5 GPM
  • Energy Factor :  .68
  • Thermal Efficiency :  77%