Bosch Boilers

Everything you need on Bosch Boilers, including model details, industry rankings and customer reviews, all in one place.

Bosch Boiler Overview

Bosch Thermotechnology supplies tankless, point-of-use and heat pump water heaters, solar thermal systems, floor-standing and wall-hung boilers, geothermal heat pump systems, and controls and accessories for these products. Bosch Thermotechnology is part of Bosch USA, which is a subsidiary of The Bosch Group. Bosch had worldwide sales of approximately $89 billion in 2017.

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Consumer Reviews of Bosch


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  • #5 of 82 Boilers
  • 100% of customers recommended

Reviews by Boiler Series

Greenstar Greenstar FS

Corporate History

Bosch was founded in Stuttgart, Germany in 1886 by Robert Bosch, with its first U.S. branch office established in 1906 in New York. Bosch USA employs approximately 24,600 men and women in over 70 locations. Bosch Thermotechnology is a division of Bosch USA, with corporate headquarters in Londonderry, New Hampshire. The Buderus line of water heating products was acquired in 2003 and is now a part of Bosch Thermotechnology.

Product Lines

Bosch produces 9 models of gas tankless water heaters, including the the Greentherm C 1050 Condensing and the Greentherm C 950 ES Condensing, which are Energy Star Rated. They also produce 3 series of electric tankless water heaters: the Tronic 5000 series for whole-house, residential and commercial use, the Tronic 3000 series for point-of-use residential and commercial use, and the Tronic 3000T mini-tank point of use.

Bosch also offers indirect hot water storage tanks, including the stainless steel SST, for its Solar Thermal Systems of domestic hot water heating.

Bosch solar systems are certified by the Solar Rating and Certification Corporation (SRCC).

Bosch manufactures both air-source and geothermal heat pumps.


The warranty on Bosch’s electric water heaters ranges from 5 to 10 years on the heat exchanger and 1 to 2 years on parts. Gas water heaters range from 5 to 15 years on the heat exchanger, with 5 years on parts and 1 year on labor costs.

There is a 6-year replacement warranty on the WST storage tank and a 10-year replacement warranty on the SST storage tank, during which time the tank will be replaced or defects repaired. Labor costs are not included.

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Bosch Boiler Reviews

"Bosch has wonderful biolers!"

5.0 rating
Very Satisfied

I currently own the Bosch Greenstar 79 ZBR21-3-NG boiler. I purchased this boiler around four months ago. So far I have had no problems with it whatsoever. I believe it was a great deal for the price. I absolutely love its appearance. It has a very sleek, modern design. The boiler seems to work rather quickly. I have no shortage of heated water supply in my home since I have installed this boiler. I am very impressed with this product from Bosch. I have no complaints about it, and there is nothing I can think of that I do not like about it. I feel as though this boiler will last a very long time without needing repairs or being replaced with another one. To any one out there in search of a dependable boiler to buy I would definitely recommend the Bosch Greenstar 79 ZBR21-3-NG. I am sure they would not be disappointed.

Valdosta, GA

"Bosch Boiler Review"

4.0 rating
Somewhat Satisfied

I have owned this boiler for a year. I like that it is quiet. I dislike how bulky it is. Have not had to repair it. I would buy the same brand again.

Bowie, Md

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