We are factory-trained Weil-McLain installers with decades of experience on Long Island. From cast iron steam replacements to high-efficiency condensing upgrades, we install and service the full Weil-McLain residential lineup across Nassau and Suffolk County.
Weil-McLain is one of the most widely installed boiler brands in the Northeast, and for good reason. Founded over 140 years ago, the company manufactures boilers in the United States and has built a reputation for durability, straightforward design, and excellent parts availability. Many Long Island homes still have Weil-McLain boilers that have been running for 25 to 30 years, which speaks to the quality of the product.
For Long Island specifically, Weil-McLain is an especially strong fit. The brand offers one of the widest product lineups in the industry, covering gas, oil, steam, hot water, combi, and high-efficiency condensing boilers. Whether you live in a 1950s Cape Cod in Nassau County with a steam radiator system or a newer colonial in Suffolk County with baseboard hot water, Weil-McLain has a model designed for your system. That versatility is a major reason we have been installing this brand since we started in 1979.
Another practical advantage is the availability of qualified technicians and replacement parts. Unlike some European brands, finding a licensed contractor who can service a Weil-McLain boiler on Long Island is straightforward. Parts are stocked locally and can typically be sourced the same day, which matters when your heat goes out in January. See our full brand lineup for other options we carry.
Manufactured domestically with parts distributed across a well-established supply chain. No waiting weeks for components from overseas.
One of the few brands that still manufactures dedicated steam boilers in cast iron. Essential for the thousands of Long Island homes with radiator systems.
Models from 84% to 95% AFUE. Entry-level replacements for budget-conscious homeowners and high-efficiency condensing units that qualify for utility rebates.
Many units last 20 to 30 years with proper maintenance. Long operational life compared favorably to most competitors in this market.
Straightforward design philosophy means faster diagnostics and simpler repairs. Important for a brand your technician will be servicing for the next two decades.
High-efficiency condensing models like the ECO Tec and Evergreen qualify for National Grid rebates and federal tax credits. We handle the paperwork.
The average Weil-McLain boiler installation on Long Island falls between $8,000 and $10,000 for a typical residential replacement. The final number depends on the model you choose, the complexity of your existing system, and whether any additional work is needed such as new venting, piping modifications, or permit requirements.
A straightforward swap of a cast iron boiler for a similar-sized unit will generally land on the lower end. Upgrading from an older atmospheric boiler to a wall-hung condensing model like the ECO Tec or Evergreen may require additional work for new venting and condensate drainage, which can push the cost higher.
Keep in mind that high-efficiency condensing models (90%+ AFUE) may qualify for National Grid rebates and federal tax credits of up to $600, which can bring the effective cost down. We also offer flexible financing through Wisetack with payments as low as $100 per month.
For a detailed breakdown of boiler replacement pricing by system type and fuel source, visit our complete cost guide.
Weil-McLain boilers are among the most commonly installed heating systems on Long Island. Walk into almost any mechanical supply house in Nassau or Suffolk County and you will find Weil-McLain parts on the shelf. That kind of local availability is not something every brand can offer, and it matters when you need a repair in the middle of a cold snap.
We have been installing Weil-McLain since we opened our doors in 1979. In that time, we have seen their product line evolve from basic atmospheric cast iron boilers to the current ECO Tec condensing series with touchscreen controls and 95% AFUE ratings. What has stayed consistent is the build quality, the warranty support, and the fact that when we need technical help from the manufacturer, they pick up the phone.
Whether you are replacing a decades-old steam boiler with a new CGa, upgrading to a wall-hung combi boiler to save space, or converting from oil to gas with a high-efficiency Evergreen, Weil-McLain has a model that fits. And because we carry 10 other brands as well, we will always tell you if a different manufacturer is a better match for your situation.
From the first phone call to your first warm morning, here is what to expect when you replace your boiler with a Weil-McLain.
We visit your home, evaluate your current system, measure your heating load, and recommend the right Weil-McLain model for your setup. We explain all available rebates and financing options. No cost, no obligation.
Once you approve the estimate, we schedule your installation at a time that works for you. We stock popular Weil-McLain models, so most jobs can be scheduled within days. Emergency service is also available.
Our factory-trained crew removes your old boiler, installs the new Weil-McLain unit, connects all piping and venting, and tests the system thoroughly. Most residential installations are completed in one day. We clean up and haul away the old equipment.
We register your Weil-McLain warranty, submit all rebate paperwork, walk you through the system operation, and provide documentation for any tax credits you may be eligible for. We are here for any questions after the job.
The complete Weil-McLain residential boiler lineup we install on Long Island, organized by fuel type. We will recommend the right model during your free estimate.
| Model | Type | AFUE | Input Sizes (MBH) | Mounting | Application |
|---|---|---|---|---|---|
| ECO Tec Series 2 | Condensing | 95% | 80, 110, 150, 199 | Wall-Hung | Hot water baseboard, radiant, multi-zone. Unity 2.0 color touchscreen. Stainless steel firetube heat exchanger. ENERGY STAR certified. |
| ECO Tec Combi Series 2 | Combi | 95% | 110, 150, 199 | Wall-Hung | Space heating and domestic hot water up to 5.4 GPM from one unit. Ideal for smaller homes or where space is limited. |
| Evergreen | Condensing | 95% | 70, 110, 155, 220, 299, 399 | Wall-Hung | Stainless steel condensing. ENERGY STAR Most Efficient. Can cascade up to 8 units. Residential through light commercial. |
| GV90+ | Cast Iron Condensing | 91% | 70, 105, 136, 160 | Floor | Patented 7-pass cast iron heat exchanger. Combines condensing efficiency with cast iron durability. ENERGY STAR certified. |
| Model | Type | AFUE | Input Sizes (MBH) | Mounting | Application |
|---|---|---|---|---|---|
| EG Series 6 | Cast Iron | 84% | 75, 100, 125, 150, 175 | Floor | Water or steam. Automatic vent damper. Intermittent electronic ignition. Natural gas. Versatile replacement for older atmospheric boilers. |
| CGi Series 4 | Cast Iron | 84% | 75, 100, 125, 150, 175, 210 | Floor | Gas-fired water boiler. Insulated steel jacket. Residential and light commercial. Durable cast iron sections. |
| CGa Series 3 | Steam | 84% | 75, 100, 125, 150, 175 | Floor | Dedicated gas-fired steam boiler. Designed for homes with radiator heating systems. The go-to steam replacement on Long Island. |
| Model | Type | AFUE | Input Sizes (MBH) | Mounting | Application |
|---|---|---|---|---|---|
| WGO Series 4 | Oil Water | 86% | 84, 98, 112, 140, 168, 196 | Floor | Cast iron oil-fired water boiler. Available with Taco circulator. Chimney vent. Burner sold separately. B100 biodiesel compatible. |
| WTGO Series 4 | Oil Water + DHW | 86% | 98, 112, 140, 168, 196 | Floor | Same as WGO with integrated tankless domestic hot water coil. Space heating and hot water in one unit. |
| SGO Series 4 | Oil Steam | 85% | 105, 133, 168, 203 | Floor | Cast iron oil-fired steam boiler. Chimney vent. Optional tankless heater. For radiator systems using oil heat. |
| Model | Type | Details | Mounting | Application |
|---|---|---|---|---|
| ECO HP New | Hybrid | Air-to-water heat pump paired with a high-efficiency Weil-McLain gas boiler | Outdoor Unit + Indoor | Dual-fuel hydronic heating. Inverter-driven heat pump shares load with gas boiler. Ideal for radiant floor and low-temperature systems. Compatible with indirect water heaters. See our heat pump conversion page for more information. |
We frequently replace older and discontinued Weil-McLain models that have reached the end of their useful life. If you have one of these boilers and are experiencing issues like frequent breakdowns, rising energy bills, or difficulty finding parts, it may be time to consider an upgrade. Here are the most common legacy models we replace on Long Island and what we typically recommend as a replacement.
The Series 68 was a workhorse on Long Island for decades but is no longer manufactured. Parts are increasingly difficult to source.
Ultra heat exchanger replacement can be a significant expense. If the boiler is over 10 years old, that repair often exceeds 50% of the cost of a new unit, making full replacement the better long-term investment.
The HE II was a solid boiler in its time, but ignitor and control board issues become frequent as these units age. Replacement parts are becoming harder to find at reasonable cost.
Older Weil-McLain cast iron steam boilers with cracked sections cannot be economically repaired. We replace these with the current CGa Series 3 or EG Series 6, sized correctly for your radiator system.
Not sure which model you have or what the best replacement would be? Call (631) 860-6681 or schedule a free estimate and we will evaluate your system and recommend the right upgrade. You can also review our repair vs. replace guide for help deciding. For a full breakdown of what replacement costs look like, visit our cost guide.
Long Island homeowners share their experience with Weil-McLain boiler installations by our team.
"We had an old steam boiler in our 1952 colonial. Domino's recommended a Weil-McLain replacement and took the time to measure all the radiators to size it correctly. No more cold rooms upstairs. These guys actually understand steam heat."
"Our old Series 68 finally gave out after 28 years. Domino's replaced it with a Weil-McLain ECO Tec and the difference is unbelievable. The house heats up faster, our gas bill dropped by about 25%, and the touchscreen control is so easy to use. Wish we had done it sooner."
"Had the Ultra heat exchanger fail on our 12-year-old boiler. Domino's was honest that the repair cost was not worth it and recommended a new Evergreen instead. They installed it the next day and handled all the National Grid rebate paperwork. Really professional from start to finish."
We install and service Weil-McLain 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 Weil-McLain boiler replacement and installation.
Get a free in-home estimate. We will evaluate your current system, recommend the right Weil-McLain model for your home, and provide a complete quote with all available rebates factored in.