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.

Questions about this model?

Consumer Reviews of Bosch Greenstar


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

Read Reviews of Other Bosch Products

Find ratings and reviews for Bosch Boilers, Heat Pumps and more

Read Reviews

Top 10 Boilers

See who made our list of the best Boilers of 2022.

See the Top Products

Find a Certified Heating & Cooling Professional In Your Area

Contact a top-rated local expert to help with all of your home's HVAC needs.

Bosch Greenstar Boiler Reviews

Showing 16-20 of 30 reviews

"Review of Bosch boiler"

5.0 rating
Very Satisfied

I really like the Bosch line of boilers. This line is part of the ZBR series and the Green Starter line. I've been using Bosch boilers for years without a problem. This particular boiler that I have is about thirteen years old and still works perfectly. I really like that they are eco-friendly and it's definitely very efficient. The good thing about Bosch boilers is that they hardly make any noise, which is a plus for my family and I. I've never had to replace it as these things last for years but it might be time to change it in the future since we've had it for a long time. It's very quick to heat up my entire home within minutes. I would definitely recommend it to a friend.

Broward, Fl

"This Boiler is awesome!!!!"

5.0 rating
Very Satisfied

I just love the Bosch Greenstar boiler! I purchased it about 3 months ago. I had to throw the old one away, because it was too big and noisy. I decided that it was time for a new boiler and started searching online, checking out all kind of models. I must admit that I didn't know which one to buy. One day a friend was visiting and saw me searching online and he suggested that I should check the Bosch boilers, he apparently had one and was very satisfied with his. So I did some more research on the Bosch boilers and decided to buy a model. When it came I was so happy because it is small and it saves lots of space in my house. Have I mention it is super quiet? OMG as soon as I turned it on I thought it wasn't working, LOL. I love my boiler. It's environmentally friendly, and it saves lots of energy. I'm actually saving money with my bills. It features 10-year full / limited lifetime heat exchanger and limited 5-year parts & labor warranties. Honestly this boiler has made my life easier and happier.

Los Angeles, CA

"DEPENDABLE BOILER for my Family's home"

5.0 rating
Very Satisfied

We have had this particular Bosch boiler in our home for 2 years now. What we appreciate about the "Greenstar" boiler line from Bosch is that they are Eco-friendly and offer a lifetime warranty or lifetime replacement on their boilers. The boiler runs quietly as well, we have a small home office in the basement and the boiler has never interfered with our work. We have not had to have any maintenance done or repairs done on the Bosch boiler so far. Honestly, we had a different brand before we bought the Bosch brand but my husband's brother works for Bosch and highly recommended it to us. My brother-in-law has one in his family's home and they are very satisfied with theirs. I would highly recommend the Bosch boiler to anyone looking to replace theirs or to purchase a new one. I give the Bosch ZBR Series boilers a "Thumbs Up" rating.

Chicago, IL

"Review of my Bosch Boiler and the quality and service it provides me."

4.0 rating
Somewhat Satisfied

I have owned this boiler for at least 2 years. For the last two years, I have had only one problem with it. My boiler went out. I called Customer Service and the way they treated me was amazing. They were quick and efficient and they made it one of their top priorities to fix my boiler. What is so great about this boiler is the people who work with the company. The people were sincere and quick to fix any problems I might have with it. The service was amazing. Why go with this company? Quick, efficient service, excellent quality, and amazing customer service. Now what isn't so great about this boiler was the pricing! But in the long run, it is very well worth the price. When my boiler went out, I immediately called to have it repaired. My boiler went out about 8 months ago, but when they came out and fixed it, the repair went well. I only went about 3 hours without the boiler and that time includes me waiting on the phone with them, waiting for them to arrive, and waiting for the actual repair work. Usually with other companies I have dealt with, I would have to have waited the whole day! I highly recommend this brand and I would recommend it to my friends and family. If you are looking for a boiler to buy, go with this company. The pricing might not be that attractive, but everything else makes this boiler number 1. Thank you for such great service!

Detroit, Michigan.

"Bosch Greenstar Boiler Review"

5.0 rating
Very Satisfied

I have owned my boiler since April. I had recently bought a new house and knew that the old boiler needed to be replaced. As for what I like, I noticed that my energy bills are significantly lower. I can compare this year's bills against the same month last year – and this year has had a colder Autumn – and the bills are quite a bit less. It also seems to run pretty quiet. The only thing I dislike is the cost. It wasn't exorbitant and I knew I wanted to buy a boiler that would last a long time, so it was worth it, but there were definitely cheaper models on the market. I have not yet had to repair or replace it. If a person was already considering a high efficiency boiler, I would recommend it, particularly in climates like mine.

Rochester, NY

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

HVAC Brands

Learn more about your home's heating and cooling system with our guides, how-to's, FAQ's, tips and more.

Ready to get a quote from an HVAC contractor?

Let us know what type of service you need and we can connect you with a certified local HVAC contractor.

Please enter a valid name

Please enter a valid phone number

Please enter a valid zip code

There are no dealers in this zip code.

Please enter a valid email address

Please select repair or replace

Please select heating, cooling or both