Bosch Greenstar Boilers

Bosch Greenstar Boiler Overview

The Bosch Greenstar is a gas condensing boiler with an efficiency rating of up to 96.1% AFUE. All models of the Greenstar series are Energy Star rated. The Greenstar features a wall-hung design and is available as a space heating boiler with a hot water tank or as a combi unit. It features an Al-Si heat exchanger made of Aluminum-Silicon alloy, and combi units are equipped with a stainless steel heat exchanger. A fully modulating fan assembly helps to increase the unit’s efficiency. All models are available for use with LP or natural gas, with a conversion kit included.

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Consumer Reviews of Bosch Greenstar


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #1 of 3 Bosch Boiler
  • 90% of customers recommended

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Bosch Greenstar Boiler Reviews

Showing 26-30 of 30 reviews

"Good, Dependable Bosch Boiler"

5.0 rating
Very Satisfied

I have owned this boiler for 3 years now. It was an replacement for my old one that finally died after 12 years. The winter here is long and cold, and so far this new one has held up great. I really love how energy efficient this model is, compared to my old one that I replaced Bosch helped me reduce my bill by 30%. The price of getting it was pretty steep, but I believe this will remain a terrific investment. Just in heating bills over the last couple of winters, I probably save well over a thousand dollars. In addition I also received a tax credit when I first purchased it, which helped a lot. I am definitely recommending this model to all my friends. If given the chance I will probably buy this brand and model again.

Richmond, Virginia

"Satisfied and Greatful"

5.0 rating
Very Satisfied

I've owned this boiler for only a few months, it's relatively new. I like that it can be hidden well in a house and isn't an eyesore. I keep it in a small closet in my basement, and we barely even notice that it's there. I like that it's very energy efficient and that our bill actually decreased when we started using it. It also makes no noise. Our older boiler made these annoying noises that often freaked guests out if they were staying overnight. They would ask my family and I what the hell the weird noise from the basement was. Since this boiler is relatively new and has a warrantee I haven't experienced any problems. I would definitely recommend this brand to a friend, it has all the best qualities of a boiler anyone could ask for. The only real negative is that it's slightly more expensive than competitors, but I think it's worth it.

Westford, MA

"My boiler saves us a lot of money"

5.0 rating
Very Satisfied

We have had it for 6 months, my energy savings from converting to natural gas with a 95% efficient boiler are tremendous. Not to mention all the space I saved. My dislikes, we need to having the water on full flow out of the kitchen sink when washing dishes. I'm not used to it, so it gets annoying. Have not had any problems with the equipment since the installation. We replaced it because the old system was really old, and we had the money to afford to replace it, so we went for the energy savings. The installation took 2 days. The Bosch Greenstar 151 is great, I tell everybody how much we love it, and how much we save.

Conway, SC

"Natural gas Propane Boiler"

5.0 rating
Very Satisfied

This is by fare one of the best investments I made for my house as fare as heating my house. This boiler uses very little Natural gas to run but, gets the job done! It has a Hydronic pump for the water and I am a big fan of Hydronic powered equipment because they are known for their reliability and not having to make near the repairs that a former boiler may have. I have owned this boiler for 3 years now and every winter my house is nice and cozy for a cheaper rate than my old central heat. I would defiantly buy this boiler again. It has saved me THOUSANDS compared to my Central heat electric bill! I have yet to make a repair on this broiler!

Bowling Green, KY

"A++ Rating / Greenstar 117,000 BTU Combi Gas Wall Condensed Boiler"

5.0 rating
Very Satisfied

I've owned the Greenstar 151 117,000 BTU Combi Gas-Fired Wall-Hung Condensing Boiler for 4 months, having purchased it for heating my large home in November of 2014. This item has a number of very positive qualities. I enjoy the fact that the boiler is very quiet, and fits very well into the relatively small space where I made the installation. It makes a fine replacement for my old water heater. It is also light compared to other models. There are no filters to replace, so my cost savings is potentially huge! I disliked the relatively high price of this item (3,700.00 +), and the fact that it was only available to me in a single color. ( White ) I have never had any mechanical problems or had to replace any part of my boiler. I would easily suggest that a friend purchase the Greenstar 151 117,000 BTU Combi Gas-Fired Wall-Hung Condensing Boiler for their own home.

Salt Lake City, UT

Other Greenstar Reviews

In comparisons on between the Greenstar and similar units by Weil-McLain, Buderus and Triangle Tube, there were several positive comments about the Bosch unit. The majority of professionals appear to prefer the other units, but not by a large margin.

Greenstar Warranty

Product registration is required within 90 days of installation for maximum warranty coverage. The warranty for the Bosch Greenstar boiler is comprised of the following:

  • Limited lifetime heat exchanger warranty, pro-rated after the 10th year
  • Limited 5-year parts and labor warranty

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