Furnace Installation and Replacement in the Chicago Suburbs
As of October 2026, a new high-efficiency furnace from Pure Comfort costs $3,000 to $9,500 installed, based on our own installed pricing, depending on efficiency, staging and venting. As a Lennox Premier Dealer serving Streamwood and the Northwest Suburbs since 2008, we size every furnace with a load calculation, finish most installs in four to six hours and back the Lennox 10-year parts warranty with our own labor warranty.
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Furnace Not Heating?
Fast, honest furnace repair from a family-owned Streamwood team.
- $75 diagnostic ($99 evenings, weekends & holidays)
- 24/7 emergency service, with same-day appointments available
- Trucks stocked with common furnace parts, so most repairs are done in one visit
- Upfront, flat-rate pricing before any work starts
Time for a New Furnace?
Free in-home replacement estimates from a Lennox Premier Dealer.
- Good, Better and Best options with upfront pricing
- Nicor Gas rebates applied where you qualify
- Financing available, including 0% APR on select Lennox systems during Lennox promotions
- Sized with a load calculation, installed and permitted
When Is Furnace Replacement Worth It?
Replacing a furnace is usually worth it when repairs keep adding up, heat is uneven, it can’t keep up in cold snaps, it has gotten louder, gas bills keep climbing or a major part fails on an older furnace. These are the signs that make a replacement evaluation worth booking.
- Repairs are adding upWhen repair costs start approaching the price of a new furnace, replacement is usually the better value. A common sign is service calls that used to be rare now arriving every season.
- Heat is unevenSome rooms never reach temperature while others overshoot, even after the filter and vents have been checked.
- It struggles in cold snapsThe furnace runs almost constantly during a deep freeze and still cannot hold the temperature you set.
- It has got louderNew rumbling, whistling or blower noise that was not there in previous winters, and does not settle down.
- Energy use keeps climbingGas bills rise while comfort stays flat, which usually means the furnace is working harder for less heat.
- A major part failed lateA costly component fails on equipment already near the end of its expected service life.
These symptoms do not automatically require a new furnace. A repair, maintenance visit or airflow correction may still be the better answer. Pure Comfort evaluates the system before recommending a direction.
How Does Our Furnace Installation Process Work?
Our furnace installation process has four steps: evaluate the home, install and adapt, verify the numbers and walk you through the system.
- Evaluate the home. We review heating demand, supply and return ducts, filter sizing, venting, gas, electrical conditions and thermostat compatibility.
- Install and adapt. Our in-house crew prepares the installation, completes the necessary duct transitions and configures the blower and controls.
- Verify the numbers. Before closeout we check temperature rise, airflow, safety operation, venting, drainage and thermostat performance.
- Walk you through. The final walkthrough covers system operation, filter changes, maintenance intervals and applicable warranty information.
Should You Repair or Replace Your Furnace?
We weigh condition, history, comfort, warranty and airflow rather than going by age alone.
A dependable furnace with one correctable fault
Repair is the practical choice when the furnace has been reliable and the problem is limited to a single component that can be properly corrected.
A major repair among several concerns
Replacement offers better long-term value when a costly repair is only one of several issues, alongside comfort, noise or airflow problems.
The Four Things We Weigh
Equipment condition and history
How the furnace has held up, and whether this failure looks isolated or like the first of several.
Comfort, noise and airflow
Whether the system actually heats the house evenly and quietly, or has been a compromise for years.
Warranty coverage still active
Parts or labor coverage still in force can change the math, so we check before quoting anything.
As a Lennox Premier Dealer, we register your furnace warranty and add Lennox ComfortShield extended labor coverage of up to 10 years.
Whether to include the AC
If the air conditioner is a similar age, replacing both together can cost less than two separate projects.
A Furnace Designed for the Home
A premium furnace cannot overcome a poor installation, so we design around the house rather than matching the old nameplate.
- Local and family-ownedFounded in Streamwood in 2008 and still run by the family who started it, not a national chain.
- Gene stays involvedThe owner handles system design, sales and quality control himself rather than passing it to a commission rep.
- Certified in-house crewsLennox Premier Dealer experience with NATE and EPA Section 608 certifications. No subcontracted installation crews.
- System-first installationAccess, return air, filter area, duct transitions, venting and commissioning all get attention, not just the box.
Compare Furnace Options Without Guesswork
Furnaces can use single-stage, two-stage or modulating heat, paired with different blower and control options. The right combination depends on the home’s load, duct capacity, comfort expectations, noise preferences and budget.
Pure Comfort primarily installs Lennox equipment and can compare efficiency, staging, blower performance, controls and warranty coverage in plain language.
What We Compare
The trade-offs that actually change how the furnace performs
- Single-stage, two-stage and modulating heat
- Blower performance and noise levels
- Control and thermostat options
- Efficiency ratings against real running costs
- Duct capacity and what the home can support
- Warranty coverage on parts and labor
What Financing, Rebates and Warranties Are Available?
Yes. Qualifying furnace projects can use Lennox promotional financing, Nicor Gas rebates and Lennox manufacturer warranties backed by our own labor warranty. Service Finance is the primary source used for Lennox promotions, with other options available when appropriate.
Rates, terms and rebate amounts change, so we confirm what applies to the selected equipment before you decide. New equipment is registered when applicable, and actual warranty coverage depends on the model, manufacturer requirements and selected labor coverage.
0% APR
Up to 60 Months
On select Lennox systems during Lennox promotions. Terms vary by system, subject to credit approval.
Free
Replacement Estimates
In-home, in writing, with no obligation.
Thorough Planning Made a Difference in Schaumburg
A Schaumburg homeowner compared five HVAC quotes before choosing Pure Comfort because our evaluation went beyond the equipment. We checked attic insulation, investigated airflow complaints and identified damaged ductwork and missing return-air capacity.
The final project corrected those system conditions along with the replacement. After installation, the homeowner reported a major improvement in comfort. That is the value of designing around the home rather than simply matching the old furnace.
Real Reviews. Real Comfort.
When you need HVAC due to an unexpected event you want someone who not only can provide the service you need….
Great service. Very professional. They try all avenues to resolve issues with equipment. Always a pleasure to work….
Had an issue with the thermostat reading erroneously, as soon as I contacted Pure Comfort, they got back….
Our serviceman, Gene, was very responsive, professional and thorough. He explained each aspect of the issue clearly and….
I called them at 7am with no heat, the only available spot they had was in the afternoon, 5 minutes later they called….
Gene was professional, on-time, very friendly and did a thorough job inspecting our A/C unit. He also checked….
Quick and honest service and advice last minute on a Sunday. Clean crew and equipment. Gene was a knowledgeable….
Gene did not give up on the problem. It was a crazy situation but he never gave up found the problem and fixed it. Thank you….
Furnace wasnt working. Called Pure Comfort after hours and they came right out and helped me. The furnace….
Very professional, definitely knowledgeable had the furnace fixed in 10 minutes. I can honestly say I trusted Gene….
Furnace Installation FAQs
What size furnace does my home need?
Your home needs a furnace sized by a load calculation, not one matched to the old unit. The calculation accounts for square footage, insulation, windows, air leakage and which way the house faces.
An oversized furnace short-cycles, heats unevenly and wears out sooner.
Can a furnace be too large?
Yes. Oversizing can cause short cycles, uneven temperatures, added noise and unnecessary component stress.
How long does replacement take?
A furnace-only replacement usually takes 4 to 6 hours. A full furnace and AC replacement takes 7 to 10 hours, depending on crew size and add-ons. Either way, we finish in one day, so you have heat or cooling again that same day.
Will my thermostat work with the new furnace?
It may. Compatibility depends on staging, blower controls, wiring and the features you want to use.
Should I replace the furnace and AC together?
Not always. We can compare furnace-only and complete-system options based on the age, condition and compatibility of both systems.
Will a new furnace lower my bills?
Efficiency can improve, but actual results also depend on sizing, airflow, insulation, thermostat use and weather.
How much does a new furnace cost?
As of October 2026, Pure Comfort’s installed price for a new furnace is $3,000 to $9,500. The low end is a 45,000 BTU, 80% efficiency furnace; the high end is a 135,000 BTU Lennox SLP99V modulating furnace. Your price depends on the size your home needs, the efficiency, and any venting or gas-line changes. Replacing the furnace and AC together costs $8,000 to $19,000.
What's included when Pure Comfort installs a new furnace?
Every Pure Comfort furnace installation includes a load calculation, our 49-point installation checklist, haul-away of the old furnace, a final walkthrough and Lennox warranty registration. Checklist highlights:
- A gas leak check, and the furnace installed level
- PVC intake and exhaust pitched and supported correctly, with 3 screws per joint on metal flue pipe
- All duct joints sealed
- The condensate drain trapped, pitched and tested
- A filter rack with a code-compliant cover
- Blower speeds, tonnage and DIP switches set for your home
- Temperature readings on every heating stage
- The thermostat programmed and connected to Wi-Fi where supported
The old furnace is hauled away. You get a walkthrough before we leave, and our office registers your Lennox warranty and emails you the certificate.
Is a 96% efficient furnace worth it over an 80%?
In Northern Illinois, usually yes. A 96% furnace turns 96 cents of every gas dollar into heat, compared with 80 cents for an 80% furnace. With our long winters, that adds up. High-efficiency furnaces vent through PVC pipe and need a condensate drain, so the price depends on your venting. We quote both options when they fit your home.
How often should a new furnace be serviced?
Once a year, ideally in early fall before the heating season. A yearly tune-up keeps a new furnace running efficiently and catches small problems early. Both of our Comfort Club plans include an annual furnace tune-up and an annual AC tune-up, starting at $15 a month.
Is it worth replacing a 30-year-old furnace?
In most cases, yes. A gas furnace usually lasts 15 to 20 years in the Chicago area, so a 30-year-old unit is well past its expected life. Older furnaces often run at 60% to 80% efficiency compared with 96% or more for a new high-efficiency model, parts are harder to find, and the risk of a cracked heat exchanger goes up. If yours is still safe, we will tell you honestly whether a repair buys you real time.
What is the $5,000 rule for furnaces?
Multiply the furnace’s age by the repair price. If the total is over $5,000, replacement usually makes more sense than repair. For example, a $350 repair on a 16-year-old furnace equals $5,600, so replacing is worth pricing out. It is a rule of thumb, not a hard cutoff, and we always give you both options in writing.
What is the best time of year to buy a new furnace?
Late spring, summer and early fall are usually best. Installers have more open days, you are not forced into a rushed decision during a cold snap, and manufacturer promotions often run in the spring and fall. If your furnace is 15 years or older, getting a free estimate before winter gives you time to compare options.
Are furnace prices going up in 2026?
Equipment prices have gone up most years recently as manufacturers raise prices, so waiting rarely saves money. Today, a new furnace installed by Pure Comfort typically costs $3,000 to $9,500, depending on efficiency, size and venting. Nicor Gas rebates of $150 to $225 and financing can lower the cost. A free in-home estimate gives you an exact written price.
Furnace Installation Across the Northwest Suburbs
Based in Streamwood and working throughout the surrounding communities. Pick your town to see local details, or call and we will confirm your address in a minute.
Not on the list? We cover much of the northwest suburbs, so call and we will confirm your address in a minute.
Tell Us What the System Is Doing
Describe the symptoms, the age of the equipment and how long it has been going on. That shapes what we bring with us and how quickly we need to get there.
- You get a scheduled window and the technician's name
- We diagnose and price the work before anything starts
- Replacement estimates are free, with no obligation
Call us at (708) 515-4822 instead of filling out the form. We answer the phone directly and can tell you what we can do and when.
Request Service or a Free Replacement Estimate
80% vs 96% vs 99% AFUE Furnaces Compared
An 80% furnace is the lowest upfront cost, a 93% to 97% condensing furnace is the best fit for most Chicago-area homes, and a 99% variable-capacity furnace gives the quietest, most even heat. We install the full Lennox line and repair all major brands.
| Option | Efficiency | Heat staging | Venting | Best for | Example models |
|---|---|---|---|---|---|
| Standard efficiency | 80% AFUE | Single-stage on most models | Metal vent into a chimney or B-vent | Budget replacements, rentals, homes where new PVC venting is hard to route | Lennox ML180E, EL280E |
| High efficiency (condensing) | 93% to 97% AFUE | Single-stage or two-stage | PVC venting to the outside plus a condensate drain | Most Chicago-area homes; lower gas bills and more even heat with two-stage | Lennox ML196E, EL296V, ML297V |
| Top tier (variable-capacity) | 97.5% to 99% AFUE | Variable-capacity on the SLP99V | PVC venting to the outside plus a condensate drain | The quietest, most even heat and the lowest gas use | Lennox SL297NV, SLP99V |
See every model side by side on our Lennox furnaces page.
Rebates you may qualify for
2026 utility programs for Northern Illinois homes. Amounts checked October 2026.
| Program | Equipment | Rebate |
|---|---|---|
| Nicor Gas | Gas furnace, 97%+ AFUE | $225 |
| Nicor Gas | Gas furnace, 95%+ AFUE | $150 |
| Nicor Gas | Furnace + smart thermostat bundle (95% / 97%+ AFUE) | $200 / $275 |
| Nicor Gas | Smart thermostat | $25 |
The federal 25C tax credit ended for systems installed after December 31, 2025. Illinois income-qualified HEAR heat pump rebates (up to $8,000) are not available yet as of October 2026, and projects finished before the program opens will not qualify. We confirm the current status on your written quote. ComEd discounts come off your invoice when a ComEd heat pump-trained contractor installs qualifying equipment. Nicor Gas rebates require qualifying equipment and Nicor’s rebate application. Programs can change, so we confirm what your home qualifies for on your written quote. Programs and amounts can change, so confirm current details on the utility sites before you buy. Official details: Nicor Gas rebates · ComEd heat pump discounts.
Licensed, certified and accredited
- Lennox Premier Dealer
- NATE-certified technicians
- EPA Section 608 certified
- BBB Accredited Business
- Licensed business in the Village of Streamwood
- Registered Illinois LLC
- Fully insured