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• Weil-McLain boilers
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• Repair or replace
• Weil-McLain warranty and GSHA In…
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• Weil-McLain boiler FAQs
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Which Weil-McLain boiler is right for your home

Hot-water or steam heat

Most homes in our area have a hot-water (hydronic) system: the boiler heats water that a circulator pumps through baseboard, radiators or in-floor tubing. A steam system boils the water and sends steam up to radiators with no pump. The two are not interchangeable, so the first question is which one your home has. The CGa Series 4 and GV90+ Series 2 are hot-water boilers only. Weil-McLain rates the EG Series 7 for either hot water or steam in every size, and the PEG version is a packaged steam boiler. GSHA’s standard installation package is written for hot-water systems; if your home has steam heat, tell us when you request an estimate.

Conventional cast iron or condensing

AFUE is the share of the fuel that becomes heat for the house over a heating season; at 84% AFUE, roughly 16 cents of every fuel dollar leaves through the flue. A non-condensing cast-iron boiler (CGa Series 4, EG Series 7) has heavy cast-iron sections, runs at 82–84% AFUE and vents hot flue gases up a chimney through a draft hood. Cast-iron sections are known for long service life and simple repairs. The chimney must be in good condition, which sometimes means adding a liner.

A condensing boiler such as the GV90+ Series 2 pulls extra heat out of the flue gases until water vapor condenses inside the boiler, which is how it reaches 90% AFUE and higher. That cooler, wet exhaust cannot go up a masonry chimney; it leaves through PVC, CPVC, polypropylene or stainless pipe that can run out a sidewall, and the boiler needs a condensate drain. The trade-off is more freedom in where the boiler goes and lower fuel use in general terms, in exchange for a stainless steel condensing section and a drain that need regular maintenance.

Heating-only, combi or a separate water heater

A heating-only boiler heats the house and nothing else; domestic hot water comes from a separate water heater or from an indirect water heater, a storage tank the boiler heats through its own zone. A combi boiler is one appliance that heats the home and makes domestic hot water on demand. A tankless water heater makes domestic hot water only and does not heat the house. The Weil-McLain boilers we install (CGa, GV90+ and EG) are heating-only, so they normally need an indirect water heater or a separate water heater; the EG also offers an optional tankless coil (flow rate not published). Weil-McLain’s ECO Tec line includes combi models; ask us about availability.

Sizing and zoning

A boiler is sized by a heat-loss calculation of the home, not by copying the nameplate of the old boiler. Old boilers were often oversized, and a right-sized boiler cycles less, heats more evenly and lasts longer. When comparing sizes, look at the net (I=B=R/AHRI) rating, which is the heat delivered to the radiators, rather than the input, which is the gas burned. Our free on-site estimate includes the heat-loss calculation.

A home can also be divided into zones, each with its own thermostat and a zone valve or circulator, so bedrooms and living areas are heated separately. Zone valves, additional circulators and additional thermostats are priced separately.

Compare current Weil-McLain boilers

Ratings above are from Weil-McLain product data; see each product page for the full size tables. Weil-McLain’s ECO Tec wall-hung condensing line is covered below as the manufacturer’s current alternative to the discontinued ECO.

CGa Series 4 gas boiler

The CGa Series 4 is the only Weil-McLain boiler with a published GSHA installed package. It is a cast-iron, natural-draft hot-water boiler at 84% AFUE in seven sizes, with an integrated control, a built-in low-water cutoff and an input for an indirect water heater. Series 3 is the prior revision with identical model numbers and ratings; Series 2 is an earlier revision with the same model numbers. We service existing Series 2 and Series 3 units. CGa Series 4 details and per-size pricing.

GV90+ Series 2 gas boiler

The GV90+ pairs a cast-iron primary heat exchanger with a stainless steel condensing section and vents through 3-inch PVC, CPVC, polypropylene or stainless pipe, so it does not need a chimney. Four sizes, 70,000–175,000 BTU/h input, 91.0–91.9% AFUE, ENERGY STAR certified. Hot-water heating only; add an indirect water heater for domestic hot water. GV90+ Series 2 details.

EG Series 7 gas boiler

The EG is a natural-gas cast-iron boiler that Weil-McLain rates for hot water (84% AFUE) or steam (82% AFUE) in every size from EG-30 to EG-75, with the PEG packaged steam version in sizes 30–65. It vents to a chimney with a draft hood and vent damper (damper additional on the EG-75). Our installation package covers the hot-water version; if your home has steam heat, tell us when you request an estimate. EG Series 7 details.

Commercial boilers

Weil-McLain’s LGB Series 2 commercial cast-iron boiler (400–2,860 MBH input, steam or water) is listed on our site for reference; commercial projects are quoted individually: installed price after a free on-site estimate.

What Weil-McLain boiler installation costs and what’s included

Installed from $8,712.51 for a CGa-3, up to installed from $11,007.18 for a CGa-8, by size. The GV90+ and EG have no published package; their installed price is confirmed after a free on-site estimate.

Every boiler installation is custom. The “from” price is the starting installed package for that model with GSHA’s standard installation scope. The final price is confirmed by a free on-site estimate because these items differ from home to home:

• Chimney and venting condition (liner, sidewall vent route)
• Piping and zoning changes
• Circulators and zone valves
• Expansion tank and air separation
• Water-quality treatment
• Gas line capacity and electrical work
• Condensate drainage on condensing boilers
• Removal of the old boiler, permits and accessories

GSHA’s standard Weil-McLain installation scope

• Set and level the boiler; new electrical disconnect, power and control wiring
• New connections to the existing supply and return piping; new cast-iron circulator (the pump that moves water through the radiators)
• New backflow preventer with autofill, Discal air separator (removes the air that causes noise and cold spots), expansion tank and hydronic docking station (a pre-built connection module for the pump and valves)
• New flue piping to the existing chimney
• Commissioning kit, Protector F1 and Cleaner F3 (cleans the old system and protects the new boiler from corrosion)
• New Honeywell T6 Pro hydronic thermostat
• Removal of the old equipment
• Start-up and safety inspection, plus a boiler tune-up in the first year

The scope above is written for a chimney-vented cast-iron boiler on a hot-water system. A condensing boiler adds sidewall venting and a condensate drain with neutralizer, which the estimate covers. Zone valves, additional circulators and thermostats beyond the package thermostat, indirect water heaters and other accessories are priced separately. Financing available with approved credit; see financing.

Request a Boiler Installation Estimate or call (224) 220-3660.

Already own a discontinued Weil-McLain boiler?

A discontinued model does not automatically need to be replaced. GSHA Services, LTD continues to service and repair existing Weil-McLain boilers, and Weil-McLain keeps parts catalogs for discontinued lines such as the ECO and the EGH. Repair comes first; if replacement makes sense, the choice depends on your heating system (hot water or steam), fuel, a heat-loss sizing calculation, venting or chimney condition and installation requirements, which the free on-site estimate settles.

Schedule Boiler Repair

Repair or replace?

• Age and condition. Cast-iron boilers commonly run for decades with maintenance. A sound boiler that needs a control, gas valve, circulator or pilot assembly is usually worth repairing.
• Leaking sections or a cracked heat exchanger. A leak between cast-iron sections or a failed heat exchanger on a condensing boiler is normally the point where replacement makes more sense than repair.
• Repeated repairs. When repair bills arrive every season, putting that money toward a new boiler under warranty is often the better use of it.
• Efficiency. Moving from an older boiler to an 84% AFUE cast-iron or a 90%+ condensing boiler reduces fuel use in general terms; the estimate will show what applies to your home.
• Parts availability. Parts for discontinued Weil-McLain lines are still catalogued, but availability can vary; we check before quoting a repair.
• Safety. Flue-gas spillage, a damaged chimney, corrosion or a failed low-water cutoff must be corrected immediately, whether by repair or replacement.

An annual tune-up matters on any boiler: it checks combustion, safety controls, the low-water cutoff, relief valve and venting, and it is also the condition for GSHA’s labor coverage below.

Weil-McLain warranty and GSHA Install-Right coverage

Weil-McLain limited warranty (residential, per the manufacturer’s warranty documents)

• CGa Series 4: cast-iron heat exchanger 20 years from installation (years 1–5 a replacement boiler, years 6–20 a replacement heat exchanger); parts 2 years; labor not covered.
• GV90+ Series 2: cast-iron primary heat exchanger 20 years; stainless steel secondary heat exchanger 5 years; parts 2 years; labor not covered.
• EG Series 7: heat exchanger 20 years on water boilers, 10 years on steam boilers (EG/PEG); parts 2 years; labor not covered.

The CGa, GV90+ and EG warranties are transferable and do not require registration. Weil-McLain boilers carry the manufacturer’s limited warranty when installed by a licensed contractor.

GSHA Install-Right Limited Boiler Warranty (GSHA’s own coverage)

Weil-McLain CGa, GV90+ and EG boilers installed by GSHA Services, LTD also carry our Install-Right coverage: 2-year parts, 5-year labor and a 20-year heat exchanger term. Labor coverage requires annual GSHA maintenance; service by others voids GSHA labor coverage. Where the manufacturer’s heat-exchanger term is shorter than 20 years (EG/PEG steam boilers, 10 years), the manufacturer’s term applies to the manufacturer’s warranty; ask us how Install-Right applies to that model.

Recent cast-iron boiler installations by GSHA Services

Weil-McLain Boiler Installation and Repair Service Areas

GSHA Services, LTD installs, services and repairs Weil-McLain boilers in McHenry County and Lake County, Illinois and surrounding communities, including Woodstock, Crystal Lake, McHenry, Cary, Barrington, Libertyville, Lake Bluff, Gurnee, Arlington Heights and Elgin, and in southeastern Wisconsin including Kenosha and Lake Geneva. Explore our service areas or contact us to confirm availability at your address.

About GSHA Services, LTD

GSHA Services, LTD is a family-owned heating, cooling and plumbing contractor serving northern Illinois and southeastern Wisconsin since 2002, from offices in Woodstock (1257 Cobblestone Way, Suite A, Woodstock, IL 60098) and Lake Bluff (11 N Skokie Hwy, Suite 111C, Lake Bluff, IL 60044). We install and service Weil-McLain boilers, and we also install Peerless, Navien, Carrier, IBC, Pennco and Lennox boilers; see our Boiler Installation page for the full range. Phone (224) 220-3660, email info@gshaservices.com. Read customer reviews on Google, the BBB and Yelp.

Weil-McLain boiler FAQs

Do you install and repair Weil-McLain boilers in my city?

Yes, if you are in McHenry County or Lake County, Illinois, the northern or western Chicago suburbs or southeastern Wisconsin. Check the service-area page or call (224) 220-3660 to confirm your address.

Can my existing or discontinued Weil-McLain boiler be repaired?

Yes. GSHA Services, LTD repairs existing Weil-McLain boilers, including discontinued lines such as the ECO and the CGa Series 2 and Series 3. Weil-McLain keeps parts catalogs for discontinued lines such as the ECO, and we confirm parts availability before quoting the repair.

What is the difference between a combi boiler and a heating-only boiler?

A combi boiler heats the home and makes domestic hot water on demand in one appliance; a heating-only boiler heats the home only, so hot water comes from an indirect water heater or a separate water heater. The Weil-McLain boilers we install (CGa Series 4, GV90+ Series 2 and EG Series 7) are heating-only; the EG also offers an optional tankless coil (flow rate not published). Weil-McLain’s ECO Tec line includes combi models; ask us about availability.

Are Weil-McLain boilers for steam or hot-water heating?

The CGa Series 4 and GV90+ Series 2 are hot-water boilers only. Weil-McLain rates the EG Series 7 for hot water or steam in every size, with the PEG as its packaged steam version in sizes 30–65. A hot-water boiler cannot be used on a steam system. GSHA’s standard installation package is written for hot-water systems; if your home has steam heat, tell us when you request an estimate.

What does installation include and what can change the price?

The installed package includes setting the boiler, wiring, connections to the existing piping, a new circulator, backflow preventer, air separator, expansion tank, flue piping to the existing chimney, water treatment, a Honeywell T6 Pro thermostat, removal of the old boiler, start-up and a first-year tune-up. The price changes with chimney or venting work, piping and zoning changes, gas line or electrical upgrades, condensate drainage on condensing models, permits and accessories, which is why the final price is confirmed by a free on-site estimate.

When does repair make more sense than replacement?

Repair makes sense when the cast-iron sections or heat exchanger are sound and the fault is a control, valve, circulator or ignition part. Replacement makes more sense with leaking sections, a cracked heat exchanger, unsafe venting or repairs that recur every season.

Which Weil-McLain boiler has a published installed price?

The CGa Series 4: installed from $8,712.51 for the CGa-3 up to installed from $11,007.18 for the CGa-8, by size, with the CGa-25 quoted after an estimate. The GV90+ and EG are quoted after a free on-site estimate.

Is my CGa Series 2 or Series 3 the same as the CGa Series 4?

Series 3 is the prior revision of the CGa line with identical model numbers, inputs, ratings and 84% AFUE; Series 2 is an earlier revision with the same model numbers, and its ratings are in Weil-McLain’s product data. Series 4 adds Weil-McLain’s Unity-CI text-screen control. Your existing Series 2 or 3 can be serviced and repaired; it does not need to be replaced because a new series exists.

Does a Weil-McLain condensing boiler need a chimney?

No. The GV90+ Series 2 vents through 3-inch PVC, CPVC, polypropylene or stainless pipe to the outdoors, often through a sidewall, and needs a condensate drain instead. The CGa and EG are chimney-vented, and the chimney may need a liner.

Get a Weil-McLain boiler estimate or repair

Request a Boiler Installation Estimate | Schedule Boiler Repair | Call (224) 220-3660