Furnace Installation & Replacement in Woodstock, IL and Chicagoland — Installed from $2,600

GSHA Services installs new gas furnaces from $2,600, with most Chicagoland replacements landing between $3,400 and $7,500 installed. We are a Carrier Factory Authorized Dealer and a Lennox Premier Dealer, and we also install Amana, Goodman, Trane, Napoleon and WeatherMaker furnaces. Free in-home estimates, same-day or next-day installation for most sizes, permits pulled by us, and financing from three lenders. Our offices in Woodstock (McHenry County) and Lake Bluff (Lake County) serve homes within about 50 miles — the northern and western Chicago suburbs and southern Wisconsin.

At a glance

Installed price	From $2,600 · typical $3,400 – $7,500 · premium modulating up to about $8,500
Brands	Carrier (Factory Authorized), Lennox (Premier Dealer), Amana, Goodman, Trane, Napoleon, WeatherMaker
Efficiency options	80% AFUE chimney-vented · 92–97% two-stage condensing · 98–99% modulating
Timeline	Estimate today → most installs done in one day → permit & inspection handled by GSHA
Rebates (2026)	Nicor Gas $225 (97%+) / $150 (95%+) · Carrier Cool Cash up to $2,100 · Lennox up to $1,800
Financing	Synchrony, Service Finance Company, rent-to-own (Microf)
Warranty	10-year parts (registered) on Carrier & Lennox; 20-year to lifetime heat exchanger; GSHA workmanship warranty
Emergency	24/7 — no-heat calls answered around the clock at (224) 220-3660

Need a new furnace? Get a free in-home estimate.

Same-day and next-day installation for most sizes. Upfront written price — no surprises.

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Furnace installation cost in 2026 (Chicago suburbs)

Furnace pricing comes down to three things: how efficient the furnace is, how it stages its heat, and what your home needs around it (venting, ductwork, thermostat). The table below is what GSHA customers in McHenry, Lake, Kane, Cook and DuPage counties actually pay, installed, including permit and start-up:

Furnace type	Examples	Installed price	Who it fits
80% AFUE, single-stage	Carrier Comfort 80 (58SC0), Lennox ML180EK, Goodman GMES80	$2,600 – $4,500	Chimney-vented homes, rentals, fast budget replacement
80% AFUE, two-stage variable-speed	Carrier Performance 80 (58TP0), Lennox EL280EK / SL280VK	$3,700 – $6,200	Better comfort where high-efficiency venting is impractical
92–96% AFUE, single-stage	Carrier Comfort 96 (59SC6), Lennox ML196EK / EL196EK	$3,900 – $5,800	Lowest-cost path to ENERGY STAR efficiency and the Nicor rebate
96–97% AFUE, two-stage variable-speed	Carrier Performance 96/97 (59TP6, 59TP7), Infinity 96/97 (59TN6, 59TN7), Lennox EL296VK / EL297VK / ML297VK	$4,000 – $7,700	Most families — quiet, even heat, lifetime heat exchanger warranty
98–99% AFUE, modulating	Carrier Infinity 98 (59MN7), Lennox SLP99VK, Amana AMVM97	$4,900 – $8,500	Forever homes, zoning, the quietest and most efficient heat

What adds to the price: larger capacities (100,000–120,000 BTU/h), converting from chimney venting to PVC, a condensate pump, new plenums or return-air ducting, a communicating thermostat, a humidifier or a 4-inch media filter cabinet. What takes off: the 2026 Nicor Gas rebate, Carrier Cool Cash, the Lennox fall promotion and our monthly deals. Prices are for the smallest size of each model and include current discounts; a heating load calculation determines the exact size and price for your home.

Furnace brands we install — compare prices by model

Click a brand to see every model we install with its efficiency, stages, warranty and “installed from” price.

Carrier furnace prices and installation cost

Lennox furnace prices and installation cost

Amana furnace prices and installation cost

Goodman furnace prices and installation cost

Napoleon furnace prices and installation cost

WeatherMaker furnace prices and installation cost

Not sure which brand? Carrier and Lennox are our premium lines with the longest warranties and the biggest rebates. Amana and Goodman offer the lowest prices with a lifetime unit-replacement warranty on select models. We are happy to quote two or three options side by side.

How a GSHA furnace installation works

1. Free in-home estimate. A comfort advisor measures the home, checks the existing venting, gas line, electrical and ductwork, and runs a heating load calculation for a -20°F design day.
2. Written options, no pressure. Usually two or three furnaces (good / better / best) with installed prices, rebates already applied and monthly payment options.
3. Scheduling. Same-day or next-day for stocked sizes during heating season; we bring space heaters if you are without heat and need to wait.
4. Installation day. Floor protection, removal and recycling of the old furnace, new furnace set level on a pad, sheet-metal transitions, venting, gas piping with a drip leg and shut-off, condensate drain, filter cabinet, wiring and thermostat.
5. Start-up and commissioning. Gas pressure, temperature rise, blower speed and combustion analysis set to the manufacturer’s specs; carbon-monoxide test; you receive the printout.
6. Permit and inspection. We pull the mechanical permit in your village or county and meet the inspector.
7. Registration and rebates. We register your warranty and file Nicor Gas, Carrier Cool Cash or Lennox rebate paperwork for you.

Repair or replace your furnace?

We repair furnaces every day and will always tell you when a repair makes sense. Replacement is usually the better investment when:

The furnace is 15–20 years old (the typical service life) and needs a repair over about $600–$800.
A repair would cost more than 30–50% of a new furnace, or it is the second major repair in two winters.
The heat exchanger is cracked — a safety issue that cannot be repaired. Get our free second opinion on a cracked heat exchanger before you buy anything.
Gas bills keep climbing, rooms are uneven, or the furnace short-cycles even after a tune-up.
You are replacing the air conditioner: a matched furnace-and-AC system installed together earns the biggest Carrier and Lennox rebates and avoids paying for two separate labor days.

Still deciding? Read our guide on furnace repair vs. replacement in Chicagoland or call (224) 220-3660 for an honest recommendation.

Sized for Chicagoland winters

Northern Illinois and southern Wisconsin see real -20°F nights and 100°F summer days. We size every furnace with a heating load calculation rather than copying the old nameplate, and we select toward the upper end of the allowed range so the house holds temperature on the coldest nights without oversizing into short cycles. For most homes that means a two-stage or modulating furnace with a variable-speed blower — we install those as our standard because they run quieter, keep rooms within a degree of each other and control humidity better than single-stage models.

Rebates & incentives for 2026

Nicor Gas 2026 rebates: $225 for a 97%+ AFUE furnace, $150 for 95%+ AFUE, $25 for a qualifying smart thermostat, plus a $25 bonus when the furnace and thermostat are on the same application. Equipment must be installed Jan 1–Dec 31, 2026 and applied for within 90 days (or by Jan 31, 2027). GSHA prepares the paperwork for you.
Lennox Fall 2026 promotion: up to $1,800 back on a qualifying Lennox system (or up to $1,400 plus 60-month no-interest financing) — buy Sept 14 – Dec 4, 2026, install by Dec 11. Details.
Carrier Cool Cash Fall 2026: up to $2,100 instant rebate on qualifying Carrier Infinity® and Performance™ systems — buy Aug 1 – Nov 20, 2026, install by Dec 20. GSHA takes it off your invoice. Details.
Federal 25C tax credit: the 30% Energy Efficient Home Improvement credit ended for equipment placed in service after December 31, 2025, so it does not apply to 2026 installations. Utility rebates and manufacturer promotions still do.

All current promotions · Financing · Tax credit history

Financing — apply online in minutes

Flexible monthly payments for qualified customers. Pick the lender that fits your budget; approval usually takes minutes.

Synchrony Financial

No-interest-if-paid-in-full promotional plans
Fixed monthly payment options
Fast credit decision

Apply with Synchrony

Subject to credit approval.

Service Finance Company

Short- and long-term plans
Low fixed APR options
Home-improvement lender

Apply with Service Finance

Subject to credit approval.

Rent-to-Own (Microf)

Options for challenged credit
No credit-score minimum on most plans
Own the system at the end of the term

Rent-to-own details

See program terms.

Why homeowners choose GSHA Services for furnace installation

Factory-authorized, licensed, bonded and insured — Carrier Factory Authorized Dealer, Lennox Premier Dealer, background-checked technicians, permits pulled on every job.
Upfront, written pricing — you approve the total before we start; no hard-sell.
Installed right the first time — load calculation, combustion analysis and manufacturer commissioning on every furnace.
24/7 service after the sale — emergency furnace repair, annual tune-ups and the GSHA PROTECT plan.
Family-owned and local — BBB Accredited since 2015, offices in Woodstock and Lake Bluff, hundreds of five-star reviews.
Clean job sites — floor protection, old equipment removed and recycled.

Where we install furnaces

From our Woodstock and Lake Bluff offices we install furnaces across McHenry, Lake, Kane, Cook, DuPage, Boone, DeKalb and Will counties in Illinois and Kenosha, Walworth and Racine counties in Wisconsin — including Woodstock, Crystal Lake, McHenry, Huntley, Algonquin, Cary, Lake in the Hills, Harvard, Marengo, Wonder Lake, Lake Bluff, Lake Forest, Libertyville, Gurnee, Waukegan, Mundelein, Barrington, Palatine, Schaumburg, Elgin, St. Charles, Lake Geneva and Kenosha. See the full service area.

More heating services

24/7 furnace repair

Furnace tune-up & maintenance

Boiler installation & replacement

Garage heater installation

Free second opinion: cracked heat exchanger

GSHA PROTECT maintenance plan

Frequently asked questions

How much does it cost to install a furnace in the Chicago suburbs in 2026?

GSHA Services installs gas furnaces from $2,600. Most homeowners in McHenry, Lake, Kane, Cook and DuPage counties pay $3,400–$7,500 installed: roughly $2,600–$4,500 for an 80% single-stage furnace, $4,000–$7,700 for a 96–97% two-stage variable-speed furnace, and $4,900–$8,500 for a 98–99% modulating furnace. Prices include the furnace, installation, permit, start-up and removal of the old unit; rebates are deducted.

Can you install a furnace the same day?

Often, yes. During heating season we stock the most common Carrier, Lennox and Goodman sizes and can usually replace a failed furnace the same or next business day. Call (224) 220-3660 and we will confirm availability for your size; if there is a wait, we can provide temporary heat.

How long does a furnace installation take?

A like-for-like replacement takes 4–8 hours. Converting from an 80% chimney-vented furnace to a 92–99% condensing furnace adds PVC venting and a condensate drain and can take a full day or spill into a second day. A furnace-and-AC replacement is typically one long day.

Is a 96% furnace worth it over an 80% furnace in Illinois?

Usually. A 96% furnace burns about 17% less gas than an 80% furnace for the same heat, which for a typical Chicagoland home is $150–$300 a year at current Nicor rates, plus the $150–$225 Nicor rebate, longer heat exchanger warranties and better rebates from Carrier and Lennox. The exceptions are homes where PVC venting is impractical or a rental you plan to sell soon.

Do I need a permit to replace a furnace in Illinois?

Yes. Every municipality and county in our service area requires a mechanical permit and inspection for a furnace replacement. GSHA pulls the permit, schedules the inspection and meets the inspector as part of every installation.

What size furnace do I need?

It depends on your home’s square footage, insulation, windows and design temperature, not just the old furnace’s label. Most Chicagoland homes need 60,000–110,000 BTU/h. We run a heating load calculation during the free estimate and size toward the upper end of the allowed range so the furnace keeps up on -20°F nights.

Which furnace brand is best?

Carrier and Lennox lead in efficiency, warranty and rebates and are what we recommend for a long-term home. Amana and Goodman deliver the lowest price with strong warranties. Every brand we install gets the same load calculation, combustion set-up and permit, and we service all of them 24/7.

Do you offer financing for a new furnace?

Yes. We offer Synchrony (promotional no-interest plans), Service Finance Company (low fixed APR, longer terms) and a rent-to-own program through Microf for homeowners with challenged credit. Approval usually takes minutes and can be completed during the estimate.

Is the federal furnace tax credit still available in 2026?

No. The federal 25C Energy Efficient Home Improvement credit ended for equipment placed in service after December 31, 2025. In 2026 the savings come from the Nicor Gas rebate ($150–$225 for 95%+ and 97%+ furnaces), Carrier Cool Cash, the Lennox fall promotion and GSHA discounts — all of which we apply for you.

Ready for a free furnace installation estimate?

Call now or book online. 24/7 no-heat service. Serving Illinois & Wisconsin.