Bosch Thermotechnology brings German precision engineering to residential heating with the Greenstar condensing boiler series. Available in wall-hung and floor-standing configurations with both heat-only and combi options, the Greenstar lineup covers virtually any Long Island home. We install and service the full Bosch Greenstar range across Nassau and Suffolk County.
Bosch has been manufacturing precision-engineered products since 1886, and their approach to boiler design reflects that legacy. The Greenstar condensing series is built around an aluminum-silicon alloy heat exchanger that resists corrosion better than traditional stainless steel, and every model delivers 95% AFUE with fully modulating fire that adjusts output to match real-time heating demand.
What sets Bosch apart on Long Island is the versatility of the Greenstar lineup. The wall-hung models are ideal for smaller mechanical rooms, finished basements, or closet installations where space is limited. The floor-standing models were specifically designed to replace older cast iron floor boilers, fitting in the same footprint with no need to build a wall or relocate the unit. Both formats are available in heat-only and combi configurations.
Bosch also owns Buderus, so homeowners replacing an older Buderus GB142 can stay within the same engineering family by upgrading to a Greenstar. We carry the full lineup and can help you choose the right model during a free estimate. See our brand comparison to explore all 11 manufacturers we install.
Bosch designs and manufactures all key components in-house, including the heat exchanger and Heatronic III control system. Precision quality throughout.
Wall-hung for tight spaces. Floor-standing for easy replacement of existing cast iron boilers. Both options at 95% AFUE with identical efficiency and control.
Every model available as heat-only for baseboard and radiant systems, or as a combi that also provides domestic hot water.
Fully modulating fan and combustion system. Among the quietest condensing boilers on the market, ideal for boilers near living spaces.
Integrated digital control with diagnostic testing, fault codes, and separate hot water and heating functions. Optional FW200 outdoor reset and CZM100 zone manager.
All models qualify for National Grid rebates and federal tax credits of up to $600. Low NOx emissions ahead of regulatory requirements.
The average Bosch Greenstar boiler installation on Long Island falls between $8,500 and $11,000 for a typical residential replacement. Wall-hung models tend to land on the lower end of the range, while floor-standing units may cost slightly more depending on the complexity of the piping transition from the old boiler.
The Greenstar FS floor-standing series can actually reduce installation labor compared to some competitors because the pre-piped low loss header eliminates the need for primary/secondary piping. This design saves time and materials, which can offset the slightly higher equipment cost.
All Greenstar models qualify for National Grid rebates and federal tax credits of up to $600 through the Inflation Reduction Act. We also offer flexible financing through Wisetack. For a full breakdown by system type, visit our cost guide.
The Bosch Greenstar floor-standing series was built specifically for the replacement market. When you have an old cast iron boiler sitting in the basement, the last thing you want is a major renovation to accommodate a new unit. The Greenstar FS fits in the same footprint as your existing floor boiler, connects to the same piping locations, and vents through PVC or polypropylene, which can often be run through the existing chimney with a flexible liner.
For homeowners in tighter spaces or looking to free up floor area, the Greenstar wall-hung models weigh as little as 75 pounds and mount on any wall with adequate support. This is a popular choice for gas boiler replacements in homes where the mechanical room doubles as storage or laundry space.
Compared to competitors like Navien and Weil-McLain, the Bosch Greenstar stands out for its exceptionally quiet operation and the build quality of its aluminum-silicon heat exchanger. It competes on efficiency with both brands at 95% AFUE while often running noticeably quieter, which matters when the boiler is located near bedrooms or living areas.
From the first phone call to your first warm morning, here is what to expect when you replace your boiler with a Bosch Greenstar.
We evaluate your current system, calculate your heating load, and recommend the right Greenstar model (wall-hung vs. floor-standing, heat-only vs. combi). We explain all rebates and financing options.
Once you approve the estimate, we schedule at a time that works for you. We stock popular Greenstar models and can typically schedule within days. Emergency service is also available.
Our crew removes your old boiler, installs the new Greenstar, connects all piping and PVC venting, and tests the system. Most residential installations are completed in one day.
We register your warranty, submit rebate paperwork, program the Heatronic III control, and provide tax credit documentation. We are here for any questions after the job.
The complete Bosch residential boiler lineup we install on Long Island. All models are 95% AFUE, ENERGY STAR certified, and available for natural gas or propane.
| Model | Type | AFUE | Sizes (MBH) | Application |
|---|---|---|---|---|
| Greenstar Wall-Hung | Heat-Only | 95% | 79, 100, 131, 151 | Space heating only. Aluminum-silicon heat exchanger. Heatronic III control. Built-in pump. PVC/CPVC/polypropylene venting. LP conversion kit included. ENERGY STAR certified. |
| Greenstar Wall-Hung Combi | Combi | 95% | 100, 131, 151 | Combined space heating and domestic hot water. Built-in expansion tank and plate heat exchanger. Ideal for homes with 1 to 2 bathrooms looking to eliminate a separate water heater. |
| Model | Type | AFUE | Sizes (MBH) | Application |
|---|---|---|---|---|
| Greenstar FS | Heat-Only | 95% | 100, 131, 151 | Floor-standing condensing. Designed to replace cast iron floor boilers in the same footprint. Pre-piped low loss header eliminates primary/secondary piping. Grundfos pump included. PVC or polypropylene chimney liner venting. |
| Greenstar FS Combi | Combi | 95% | 100, 131, 151 | Same floor-standing platform with integrated domestic hot water. Pre-piped low loss header. Simplifies installation when replacing old floor boilers in homes that also want to eliminate a separate water heater. |
Long Island homeowners share their experience with Bosch Greenstar boiler installations by our team.
"We replaced an old Weil-McLain cast iron boiler with a Bosch Greenstar floor-standing unit. Domino's recommended the FS model because it fit right where the old boiler was, no extra construction needed. The difference in noise level alone was worth it. You can barely hear it running."
"We went with a Bosch Greenstar Combi for our 1,400 square foot ranch. It handles the baseboard heat and gives us endless hot water from one wall-mounted unit. We were able to remove the old water heater from the utility closet and gained a ton of storage space. Domino's explained all the options clearly."
"Had a Buderus GB142 that needed a heat exchanger and Domino's recommended upgrading to the Bosch Greenstar since it is the same engineering family but with a better track record. The transition was simple because a lot of the connections were compatible. Very happy with the quality and the gas savings."
We install and service Bosch Greenstar boilers across every town in Nassau County and Suffolk County. Based in Melville for fast response.
Every town from the Queens border to the Suffolk line. Garden City, Levittown, Massapequa, Hempstead, and 60+ more communities.
Nassau County DetailsOur home base. Huntington to Montauk, including the North Fork, South Fork, and everything in between.
Suffolk County DetailsCommon questions Long Island homeowners ask about Bosch Greenstar boiler replacement and installation.
Get a free in-home estimate. We will evaluate your current system, recommend the right Greenstar model for your home, and provide a complete quote with all available rebates factored in.