DuPage County · ZIP 60523
Most Oak Brook homeowners replace a furnace exactly once or twice in a lifetime — which is why we walk you through it like it is the first time, every time.
From homes near Oakbrook Center to the neighborhoods around Fullersburg Woods, we have set furnaces in Oak Brook closets, basements, and utility rooms of every vintage.
Sizing comes from the house — envelope, ductwork, and real heating performance — because an oversized furnace short cycles its way to an early death and an undersized one loses the fight in January.
Here is when a new furnace beats another repair:
From estimate to first heating cycle:
We measure the house, inspect ducts and venting, and look at how the old system actually performed before recommending capacity and efficiency. No shortcuts on that step — not in Oak Brook, not anywhere.
Several tiers, actual model numbers, actual totals — and the $175 single-unit or $350 full-system discount already applied where it belongs. Nothing quoted from memory, nothing added later.
Old unit out, new furnace set with properly fitted transitions, venting and condensate to code, gas leak-tested, drop cloths down the whole way.
Instruments close out the job: temperature rise, gas pressure, static pressure, and every safety control verified against spec. Warranty registered, thermostat and filter explained, and then we get out of your way. We hold that line on every job in DuPage County.
Furnace sizing is a local craft: a Oak Brook home needs equipment that handles design temperatures near zero with reserve for the polar-vortex outliers, without being so oversized it short cycles through the shoulder seasons. large custom and luxury homes on generous lots — multi-system houses, zoned setups, and finished lower levels where comfort expectations run as high as the square footage — so we size the house in front of us.
What to avoid when replacing a furnace:
Replacement money, without the fog:
Watch the quote spread trap: identical furnace models get quoted thousands apart across companies, with install quality hiding in the gap — venting done right, gas pressure set with instruments, combustion tested, airflow verified. Our quotes itemize the work, and the current $350 full-system special and $175 single-unit special come off honest numbers. If a number ever feels unclear, call 630-486-0401 and we will walk you through it line by line.
Real customers, real Google reviews
“The Apex Climate Control technicians are simply the BEST!”
“Great service and quality work, thanks!”
Good to know
That one is not a judgment call. A cracked exchanger can push combustion gases — carbon monoxide included — into your home's air, and on older furnaces the repair costs so much that replacement wins anyway. It is the single diagnosis where we will not help you limp along.
Our Enhancify financing partner approves scores as low as 550, with 0% promotional options for qualified customers. You can apply online in minutes before committing to anything. That has held true on every Oak Brook job we have run.
With heating seasons this long, 95%+ condensing furnaces usually earn their premium back in fuel savings — but the right answer depends on your venting situation, how long you plan to stay, and your budget. We lay out the math for your actual house.
The house decides — envelope, windows, insulation, duct capacity — not the label on the old unit. Homes get air-sealed, remodeled, and re-windowed over decades; matching the old furnace just repeats a sizing decision somebody made for a different version of your house.
Capacity, efficiency tier, and what the venting, gas, and ducts need all move the number — so the honest version is a written in-person quote at several price points. The current specials cut $175 off a single unit or $350 off a full system, and financing opens at a 550 credit score.
If the AC is also in the 12–15+ year range, pairing them saves duplicate labor, gets matched components, and qualifies for the $350 full-system discount. If your AC is young, we will tell you to keep it.
Yes — removal and disposal of the old equipment is part of every install. It is one of the most common questions we get around Oak Brook.
One call reaches our local team — no national call center, no runaround. Serving Oak Brook and all of DuPage County.
Or email support@apex-climate-control.com · Financing available with credit scores as low as 550