A complete Bosch boiler buying guide and brand review, including Bosch’s top models, AFUE ratings, features, model comparisons, warranty information, and more.

When it’s time to buy a new Bosch boiler for your home, this guide will give you all the information you need.

This Bosch boiler review will talk about their good points, areas that could use improvement, the models they offer, the AFUE ratings you can expect, the warranties that back their products, price ranges, cool features and technology they’ve developed, and more.

Also Read: The Best Boilers for Canadians

The Bottom Line

Bosch is an extremely popular boiler brand in Canada, and many homeowners across the country like and trust their boilers to keep their families warm and safe during the cold winters. Not only are their boilers cost-saving in terms of energy, but they’re also relatively affordable to buy.

While the brand doesn’t have a great selection or a lot of novel technologies, they do manufacture reliable, long-lasting, well-engineered, and efficient boilers. Their boilers have great efficiency ratings, low nitrogen oxide emissions, and several are ENERGY STAR certified, so they use about 10% less energy than standard boilers. 

In terms of environmental responsibility, Bosch has taken things to the next level with their Greenstar boilers, so consumers who are concerned about the planet and their comfort are sure to find a suitable model from this brand.

Real Bosch Boiler Review Data

Most customers are very satisfied with Bosch boilers. People love their quiet and energy-efficient operation. They also say the units run well, are reliable, and have great features. What’s more, the efficient operation may help save you money on energy bills. However, some people do complain about their customer service, but overall, most people who have bought a Bosch boiler would recommend one to others.

Bosch Average Boiler Price Range

$3,000 – $7,000+ (including installation)

We know it’s important for you to be able to budget for your boiler upgrade, but there are so many things that can impact the final cost that it’s impossible to give more than a wide price range.

One of the major factors that will impact the price is the installation cost. This typically starts around $1,000, but can fluctuate based on:

• The make and model of the boiler
• Installation complications
• Where you live
• Boiler type
• Current infrastructure (such as whether you have the necessary gas hookups)
• Number of zones

The price of the boiler itself will be affected by similar factors, including where you live, make and model, size/capacity, zones, AFUE rating, warranty, features, boiler type (such as conventional, condensing, combi, etc.), and more.

There are also a couple ways you can reduce the cost of your new boiler, and the first is to look for rebates from the government, your local HVAC distributor, utility companies, or Bosch directly. Furthermore, you can save more money in the long run by opting for a higher-efficiency boiler, which will cut energy costs over time.

Bosch Boiler Options Reviewed

Heat-Only Condensing Boilers

Bosch’s heat-only boilers are more sophisticated than conventional boilers because they’re condensing, so they’re equipped with a secondary heat exchanger that traps and recycles moisture in the exhaust gasses. This makes them more efficient, reduces heat loss, and enables them to keep your home at the perfect temperature for less money.

Bosch has condensing heat-only boilers in their Greenstar and GB162 series. These are all compact units that offer versatile installation options, and they’re available in a wide range of sizes and capacities to suit the needs of just about any home.

Condensing Combi Boilers

Condensing combi boilers take all the added efficiency of a condensing boiler and put it into a combi boiler that both heats your home and provides all the hot water you need for daily use.

There are select models in Bosch’s Greenstar series that are condensing combi boilers, which are ideal for homeowners looking to replace an older combi boiler, or wanting to replace an aging boiler and water heater with one unit.

Every one of Bosch’s condensing combi boilers has an AFUE rating of 95 percent and some great environmental benefits compared to other combi boilers on the market.

Comparison of Bosch’s Top Models

Let’s review Bosch’s boilers and how they compare.

Greenstar Series

The condensing boilers in Bosch’s Greenstar series are efficient and well-made units that are available in both heat-only or combi models. They have AFUE ratings of 95 percent, turndown ratios of 5:1, fully modulating fans, and ENERGY STAR certification. They also have additional insulation to ensure quiet operation. 

There are lots of reasons for environmentally conscious Canadians to love these boilers, including the low nitrogen oxide emissions, good efficiency rating, and that they can be hooked up to renewable energy sources like solar. Greenstar boilers are suitable for just about any home, because they’re compact and easy to install, come in wall-mounted and floor models, and have flexible installation options. They also have reduced maintenance requirements thanks to the corrosion-resistant aluminum-magnesium-silicon heat exchanger, which also boasts better heat transfer, cleaner combustion, and a longer life. 

Finally, Greenstar boilers can be paired with the Heatronic III Boiler Control, which can perform diagnostic testing and provide fault codes for troubleshooting, and makes controlling the separate boiler and hot water functions a breeze.

Boiler Stats

AFUE: 95 percent
Boiler type: Heat-only condensing and condensing combi
ENERGY STAR rated? Yes
Sizes available: 57,000 to 151,000 BTUs
Number of models: Eight

What’s good: These are high-quality condensing boilers that have been specially engineered for performance and efficiency, and they have many green features that make them ideal for homeowners who care about the environment as well as their comfort and budget.

Buderus SSB Series

Bosch’s Buderus SSB series floor-standing boilers are condensing heat-only boilers designed for commercial applications and can be cascaded with multiple units. They have AFUE ratings as high as 96.8 percent, one of the highest ratings on the market.

Boiler Stats

AFUE: Up to 96.8 percent
Boiler type: Heat-only condensing
ENERGY STAR rated? Yes
Sizes available: 800 to 8192 MBH
Number of models: Four

What’s good: Buderus SSB condensing boilers are among the most efficient boilers available, and promise lasting performance in commercial applications thanks to their high-quality components; plus, they’re easy to operate thanks to the user-friendly interface.

Buderus GB162 Series

The Buderus GB162 series models aren’t ENERGY STAR certified and they have a lower 93 percent AFUE rating. Nonetheless, these heat-only boilers still have a 5:1 turndown ratio, and they’re reliable and well-made, and will still save you plenty on energy bills compared to older boilers. Buderus GB162 are perfect for either residential or light commercial applications, and they can be cascaded with up to eight boilers for larger spaces. 

But no matter what size space you’re dealing with, these models are compact, lightweight, and designed for easy and flexible installation. Plus, these wall-hung models promise quiet operation, low emissions, and they can be fuelled with propane or natural gas.

Boiler Stats

AFUE: 93 percent
Boiler type: Heat-only condensing
ENERGY STAR rated? No
Sizes available: 242,000 to 302,000 BTUs
Number of models: Four

What’s good: These are heavy-duty boilers with decent efficiency ratings, good turndown ratios, and good warranties that will protect your investment for many years.

Singular Combi Boiler Series

The Singular is a high-efficiency condensing combi boiler that can produce up to 7.7 gallons per minute of domestic hot water. Depending on the model and water temperature, it can run up to three showers plus a dishwasher at the same time. This compact wall-mounted unit is cost-effective, lightweight, and designed for easy installation. It’s equipped with a built-in boiler circulator pump, stainless steel heat exchanger, and low NOx burner. It also has a turndown ratio of 10:1 for improved efficiency.

Boiler Stats

AFUE: 95 percent
Boiler type: Condensing combi
ENERGY STAR rated? Yes
Sizes available: 155,000 and 199,000 BTU
Number of models: Two

What’s good: The Singular is an ideal boiler for most homes looking for a combi boiler solution that can provide plenty of hot water. It’s small, affordable, powerful, efficient, and designed for easy installation and lasting operation.

Bosch Exclusive Features

Feature 1 – Al-Mg-Si Heat Exchanger

Bosch’s Greenstar boilers are manufactured with a special heat exchanger made from aluminum, magnesium, and silicon. Along with providing increased heat transfer, these heat exchangers also resist corrosion and offer cleaner combustion than traditional heat exchangers.

The unique material composition also prevents scale build-up, reduces maintenance and service requirements, increases lifespan, and helps the heat exchanger maintain efficiency over its entire life.

Bosch’s Boiler Warranty

We talked earlier about ways you can save money on your boiler, and the warranty is one of them. While you might pay a bit more up front for a boiler with a better warranty, you could also save yourself in the long run.

Another reason boiler warranties are important is because they give an indication of how much the manufacturer stands behind the product. Longer boiler warranties suggest the manufacturer doesn’t expect to see any major problems in that time, so you can expect the unit to perform optimally and reliably during that period.

Warranty terms for the Greenstar Series and Buderus GB162 Series boilers include:

• A five-year warranty for parts
• A 10-year warranty for the heat exchanger
• A prorated warranty (80 down to 25 percent) for the heat exchanger for years 11 to 15
• 25 percent coverage for the heat exchanger beyond year 15

Singular boilers are backed by a 10-year heat exchanger warranty, five-year parts warranty, and one-year labor warranty.

BOSCH: ABOUT THE COMPANY

Founded in 1886 in Germany, Bosch has one of the longest histories of any HVAC company around today. Although the original company was dedicated to mechanical and engineering work, Bosch eventually branched out into home appliances and HVAC equipment, and today they are one of the leaders in manufacturing reliable, high-efficiency, and environmentally-forward boilers and HVAC products.

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FAQ

Viessmann vs Bosch Boilers

Viessmann is a very popular brand around the world, but Bosch tends to be more popular and well known in Canada. Viessmann has a long history and good reputation for providing excellent quality and value for money. Bosch boilers are more affordable, but they’re still efficient and reliable.

How long should a Bosch boiler last?

Bosch boilers have an average lifespan of 12 to 15 years. However, with professional installation and regular maintenance, it may be possible to get 20+ years out of your boiler.

Where are Bosch boilers made?

Bosch boilers are made in Germany and Austria. Worcester Bosch is a sister company based in the UK, and their boilers are made in England.

Which boiler is the most reliable?

All boilers sold in Canada meet safety and performance regulations, so they’re all going to be similarly reliable. That being said, Bosch and Viessmann both have among the best reputations for reliability, and they stand behind their products with similar warranties.