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New Furnace Installation & Replacement in Mount Prospect, IL
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Plenty of Mount Prospect, IL, homes are still heated by a furnace that went in 15 or 20 years ago, back when efficiency standards were lower and repairs were rare. Now the same furnace needs a service call every winter, the gas bills keep climbing, and the upstairs never quite warms up. Each repair buys a little more time, but it’s money spent on equipment that’s near the end of its life anyway. Furnace installation & replacement swaps that aging unit for a properly sized, high-efficiency furnace that heats the house evenly and costs less to run.
Furnace Replacement From Intelligent Service
Intelligent Service, a family-owned company based in Mount Prospect, IL, installs and replaces gas furnaces in homes throughout the northwest suburbs. We handle everything from a straight swap in a basement utility room to a full upgrade with new venting and controls.
Every furnace we install comes with our No Lemon guarantee: if the heat exchanger fails in the first five years and the furnace has been maintained to the manufacturer’s guidelines, we’ll replace it with a new current model. If another company has already quoted you a new furnace, we’ll give you a free second opinion before you sign. Financing is available to spread the cost of a new furnace over time.
Signs It’s Time for a Furnace Upgrade
A furnace rarely fails all at once. Most give years of warning signs before they finally quit:
- Age over 15 years: Older furnaces lose efficiency, and parts get harder to find as models are discontinued.
- Repairs every season: When you’re paying for a service call every winter, that money could go toward a new furnace.
- Climbing gas bills: A furnace that’s wearing out burns more gas to deliver the same heat.
- Hot and cold rooms: Uneven temperatures can mean an undersized or worn-out blower that can’t keep up.
- Cracked heat exchanger: A crack can let combustion gases escape and is often the point where replacement makes more sense than repair.
- Rust and corrosion: Rust on the cabinet, burners, or venting points to moisture and age taking their toll.
If two or more of these sound familiar, it’s worth getting a replacement assessment before the next breakdown forces the decision.
Choosing the Right New Furnace
The best furnace for your home depends on its size, insulation, ductwork, and how you want it to feel inside. We’ll explain the trade-offs in plain terms so you can pick what fits.
High-Efficiency Gas Furnace Options
Most of the furnaces we recommend for Chicago-area homes fall into a few categories:
- High-efficiency condensing furnaces: These pull extra heat from exhaust gases and vent through PVC pipe, turning more of your gas into usable heat.
- Two-stage furnaces: They run on a low setting most of the time and switch to high only on the coldest days, which means steadier, quieter heat.
- Modulating furnaces: These adjust output in small steps to match what the house needs, keeping temperatures especially even.
- Smart thermostat pairing: A new thermostat can help a new furnace run on a schedule that fits your routine.
Sizing matters as much as efficiency, which is why gas furnace installation should start with a load calculation instead of simply matching the old unit’s size. An oversized furnace short cycles and wears out early, while an undersized one runs constantly on cold nights.
Related Services
A new furnace works best with ductwork that delivers its heat where it’s supposed to go. If your ducts are leaking or undersized, air duct repair and installation can fix cold rooms the furnace alone won’t solve.
Once your new furnace is in, yearly furnace maintenance keeps it running efficiently and protects your warranty.
If you’re not ready to replace yet, our furnace repair team will tell you honestly whether a repair is worth it. You can see our full lineup of heating services in one place.
Plan Your New Furnace Installation in Mount Prospect
Replacing a furnace on your own timeline is far easier than replacing one during a January breakdown. You can schedule a furnace replacement consultation online, and a technician will look at your home and talk through your options. We’ll give you straight answers, never a sales pitch.
Frequently Asked Questions
Furnace replacement cost depends on the size and efficiency of the new furnace, whether venting or ductwork needs changes, and how easy the install location is to reach. A straight swap usually costs less than a job that needs new PVC venting or gas line work. We’ll give you a clear price before any work begins.
Most straightforward furnace replacements are finished in a single day. Jobs that add new venting, ductwork changes, or a matching air conditioner can take longer. You’ll know the timeline before the install is scheduled.
You don’t have to, but it’s worth considering if your air conditioner is more than 10 to 12 years old. The furnace blower and the AC coil work together, so a matched pair often runs more efficiently. If the AC is fairly new, we’ll make sure the new furnace works well with it.
