Furnace Installation That's Sized Right, Priced Fairly, and Done in a Day

If your furnace is pushing 15–20 years old, breaking down repeatedly, or costing more to repair than it's worth, you're probably weighing a decision that feels expensive and uncertain. We make it straightforward. Before we ever recommend a new furnace, we tell you honestly whether your current system still has usable life — because a repair that buys you five more good years is often the smarter call. When replacement is the right move, we size the system correctly for your home, explain what you're getting and why, and complete most installations in a single day.

We'll Tell You If You Don't Need a New Furnace

Most homeowners we hear from aren't sure whether they actually need a new furnace or whether they're being pushed into one. That skepticism is reasonable — a lot of companies in this market lead with replacement because the margin is better. We don't operate that way. Joel has turned down furnace replacement jobs because the existing system had years left in it. That's the standard we hold ourselves to, and it's why our reviews say what they say.

How to Know When Replacement Makes More Sense Than Repair

There's no universal rule, but there are clear signals. If your furnace checks two or more of the boxes below, replacement is likely the more practical path — and we'll walk you through the math during your in-home visit.

• The system is 15 years old or older
• You've had two or more breakdowns in the past two heating seasons
• A single repair quote is approaching 50% of what a new system would cost
• The heat exchanger is cracked (a safety concern, not just a performance issue)
• The furnace is running but your home isn't reaching temperature consistently
• Your heating bills have climbed without a clear explanation

If none of those apply, there's a real chance a repair is the right answer. We'll tell you either way.

What a New Furnace Costs in Illinois — and What Affects the Number

Gas furnace replacement in the northwest Chicago suburbs typically runs between $3,500 and $7,000 in 2026, depending on the efficiency rating of the unit, the complexity of the installation, and whether any ductwork modifications are needed. If you're replacing the furnace and central AC together, full system replacement generally falls in the $8,000–$16,500 range.

Those ranges exist because no two homes are the same. A properly sized furnace for a 1,400-square-foot ranch in Streamwood is a different unit than what a 2,800-square-foot two-story in Schaumburg needs. We don't quote the cheapest common size and hope it works — we perform a load calculation during your in-home visit to determine the right system for your specific home. Getting the sizing wrong costs you money every month in wasted energy and shortened equipment life.

One thing almost no competitor mentions: Nicor Gas offers rebates of up to $200 on qualifying high-efficiency furnaces rated at 95% AFUE or better. Ask us about eligibility when we come out for your quote.

What the Installation Process Looks Like

Most furnace replacements are completed in a single day. We schedule with that goal in mind — especially during winter, when leaving a family without heat overnight isn't acceptable. Here's what to expect:

• We start with an in-home assessment to confirm sizing, inspect existing ductwork, and identify any code or clearance considerations
• We source the right equipment for your home — not whatever's easiest to move off a truck
• Installation day typically runs four to six hours for a standard replacement
• We walk you through the new system before we leave: thermostat operation, filter schedule, and what to watch for in the first heating season
• We're available after the job if you have questions — you're not handed off to a call center

We serve homeowners across Streamwood, Schaumburg, Bartlett, Hanover Park, Elgin, and Hoffman Estates, and we can reach Carol Stream, Roselle, and Glendale Heights as well.

Ready to Find Out What Your Home Actually Needs?

We're not going to tell you that you need a new furnace until we've looked at what you have and given you an honest read on it. If replacement is the right call, you'll get a quote that covers the right system for your home at a price that won't make you feel like you got taken. If a repair makes more sense, we'll say that too.

Furnace Installation — Common Questions

Schedule Your Free In-Home Furnace Consultation

JDT Heating and Cooling is owner-operated, licensed, insured, and available 24/7 for emergencies. We serve the northwest Chicago suburbs and stand behind every installation personally.