Furnace Replacement & Installation in Mount Prospect, IL
A new furnace in Mount Prospect costs $3,000 to $9,500 installed, before Nicor Gas rebates, and the in-home estimate is free.
456 Google Reviews
Your Peace of Mind
Flexible Options
We're Here Anytime
Guaranteed
Get a Free New Furnace Estimate in Mount Prospect
A Lennox Premier Dealer quote, free and in writing.
- Three written options with clear prices
- Nicor Gas rebates on qualifying furnaces
- Financing available, including 0% APR on select Lennox systems during Lennox promotions
- Sized with a load calculation, installed and permitted
Maybe It Just Needs a Repair
Not ready to replace? A furnace repair starts with a $75 diagnostic, waived with the repair.
- $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
Quick Summary
As of October 2026, a new furnace from Pure Comfort Heating and Cooling costs $3,000 to $9,500 installed in Mount Prospect, IL (60056), before Nicor Gas rebates of $150 to $225 on qualifying high-efficiency models. Estimates are free and in writing, with Good, Better and Best Lennox options, most installs take one day, and replacing the furnace and AC together costs $8,000 to $19,000. Call (708) 515-4822.
Reviewed by Gene Baldassano, owner and NATE- and EPA 608-certified HVAC technician since 2008 · Updated
Which New Furnace Fits a Mount Prospect Home?
Most Mount Prospect homes were built in the 1950s building boom, so a new furnace usually goes into a basement or utility room under a brick ranch, Cape Cod or split-level. Cape Cods have finished upper floors that were often added onto the original duct system, so we look at how heat reaches the bedrooms upstairs before choosing a furnace. Many older furnaces here still vent into a masonry chimney shared with the water heater, so moving to a 96% model means planning new PVC venting and making sure the water heater still drafts safely. Every furnace is sized with a load calculation, not the old nameplate.
Furnace Installation in Mount Prospect: How It Works
Sizing comes first. We run a load calculation for your Mount Prospect home and check the ductwork, venting and gas supply. You get written options. Our own crew handles install day: old furnace out, new furnace in, venting, gas and condensate connected, then a gas leak test, combustion check and airflow test. We register the Lennox warranty before we go.
Is It Time to Replace Your Mount Prospect Furnace?
A gas furnace usually lasts 15 to 20 years in the Chicago area. A quick check is the $5,000 rule: multiply the furnace’s age by the repair price. If the result is over $5,000, replacement usually makes more sense. If your Mount Prospect furnace is younger or the repair is small, a repair may be the better value, and our Mount Prospect furnace repair team can diagnose it for $75.
Related Services in Mount Prospect
Services Mount Prospect homeowners book with us.
Mount Prospect Furnace Installation Prices
Most furnace replacements in Mount Prospect cost $3,000 to $9,500 installed. A furnace and AC together run $8,000 to $19,000. You get the price in writing at a free estimate, with Nicor Gas rebates and financing included. Chimney and venting changes in 1950s homes, upstairs airflow in Cape Cods and return-air fixes drive most of the price.
| Item | Typical price | What changes it |
|---|---|---|
| Free in-home estimate | $0 | Load calculation and written Good, Better and Best options |
| New furnace, installed | $3,000 to $9,500 | Efficiency, single-stage versus two-stage or variable-speed, venting and return-air work |
| Furnace and AC together | $8,000 to $19,000 | Matched Lennox system with shared labor |
| Nicor Gas rebate | $150 to $225 | Qualifying 95%+ and 97%+ AFUE furnaces |
| Install time | Usually 1 day | Return-air, venting or zoning work can add a day |
| Permit and inspection | Arranged where required | Who files depends on the Village of Mount Prospect |
| Financing | 0% APR on select Lennox systems | During Lennox promotions; longer terms with interest on projects over $2,000 |
Any permit your Mount Prospect furnace replacement needs is confirmed before we start, and we schedule the inspection for you.
Why Mount Prospect Families Pick Pure Comfort
You get a load calculation, a written quote and our own crew on install day.
Family-owned since 2008
Founded in Streamwood in 2008 and still owned and operated by the family who started it.
Employees, not subs
No subcontractors. The people who quote your furnace are the company that installs it.
Insured and certified
Fully insured and licensed, with NATE and EPA 608 certified technicians doing the work.
Factory-trained on Lennox
Lennox Premier Dealer, so you get Lennox promotions and warranty support.
Every new furnace is sized with a load calculation and matched to your ductwork, venting and gas supply. We handle the Mount Prospect permit and inspection when one is required.
Want a Second Opinion on Your Furnace?
Tell us how old the furnace is and what it is doing. We will give you an honest repair-or-replace answer.
Feedback From Homeowners We Serve
Choosing an HVAC company means trusting the people who enter your home and the work they leave behind. Read recent customer feedback about Pure Comfort’s communication, care and workmanship.
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 Replacement in Towns Near Mount Prospect
New furnace installs cover Mount Prospect (60056) and the towns around it, including furnace replacement in Arlington Heights, furnace replacement in Des Plaines and furnace replacement in Elk Grove Village. Our shop is in Streamwood, about 25 minutes away, and our own crews handle every install.
Furnace replacement in nearby towns
- Arlington HeightsFurnace replacement
- Des PlainesFurnace replacement
- Rolling MeadowsFurnace replacement
- Elk Grove VillageFurnace replacement
- PalatineFurnace replacement
Near Mount Prospect but not listed? We serve towns within about 20 miles of Streamwood. See all service areas or call (708) 515-4822.
New Furnace Questions From Mount Prospect
How much should I budget for a new furnace in Mount Prospect?
Budget $3,000 to $9,500 for a new furnace, or $8,000 to $19,000 with a new AC. Financing, including 0% APR on select Lennox systems during promotions, can spread the cost. Chimney and venting changes in 1950s homes, upstairs airflow in Cape Cods and return-air fixes drive most of the price.
How do I get a free furnace estimate or quote in Mount Prospect?
Book a free visit online or call (708) 515-4822. You get written new furnace options sized to your Mount Prospect home, with rebates and financing shown, and you can take your time deciding.
Who handles the permit for a new furnace in Mount Prospect?
We do. Where Mount Prospect requires a permit, we pull it or help you file it, then schedule the inspection.
Should I choose an 80% or a high-efficiency 96% furnace in Mount Prospect?
Most Mount Prospect homes can take a 96% furnace vented through PVC. Because so many 1950s furnaces share a chimney with the water heater, we either keep an 80% furnace in the chimney or plan new venting for both, so the water heater still drafts properly.
What happens on furnace install day?
Our crew removes the old furnace, sets the new one, connects gas, venting and condensate, tests combustion and airflow and walks you through the thermostat. Most installs take one day.
Do you use subcontractors for furnace installs in Mount Prospect?
No. Our own NATE-certified crews install every system, and we are about 25 minutes from Mount Prospect.
When does an old furnace stop being worth repairing?
When age times the repair price tops $5,000, or when the heat exchanger is cracked. Furnaces here last 15 to 20 years, so a 20- or 30-year-old furnace is usually due.
Schedule a Free Furnace Estimate in Mount Prospect
Free furnace estimates, written options and a local crew that installs every system itself.
- 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
Prefer to talk? Call (708) 515-4822. Phones are answered 24/7; forms are answered during business hours.