Family-owned · Serving Lisle, IL
Heating & Air Conditioning Services in Lisle, IL
Your home is your fortress. We protect your comfort. Lisle mixes tech-corridor office parks with tree-covered residential streets — we size systems for both, not just one.
Family-owned
Built on trust. Not private equity.
Premium service
Quality workmanship you can rely on.
Honest pricing
Straightforward. No games.
Always on call
Emergency calls answered 24/7 — even Sundays.
Cooling
AC Repair, Installation & Maintenance in Lisle, IL
We service air conditioners, heat pumps, and ductless mini-splits throughout Plainfield, Naperville, and nearby suburbs. When your home stops cooling, we provide same-day diagnostics whenever availability allows.
AC Repair
$150–$600AC Installation & Replacement
From $3,800Ductless AC Installation & Mini-Splits
From $3,000/zoneAC Maintenance
$89–$150
Heating
Furnace Repair, Replacement & Heating Maintenance in Lisle, IL
Our heating services cover furnaces, heat pumps, tune-ups, and the combustion safety checks that come with burning gas indoors. For no-heat emergencies, we answer the phone 24/7.
Furnace Repair
$150–$600Furnace Installation & Replacement
From $3,500Heat Pump Repair & Installation
From $4,500Heating Maintenance & Tune-Up
$89–$150
Why local actually matters here
Local HVAC service for Lisle homes.
Lisle sits in the Illinois Technology and Research Corridor, so the village has a real mix of homes and office parks. We size a system differently for a shaded residential lot than for a commercial building with a very different heat load, and we handle both.
The Morton Arboretum's 1,700 acres sit right in Lisle, and the village has taken to calling itself "The Arboretum Village." Heavy tree cover changes a house's cooling load in ways a wide-open subdivision doesn't — it's one more thing we factor into a Manual J out here.
Lisle dates to 1832 and grew up as a stop on the Chicago, Burlington and Quincy Railroad in the 1860s. Its older rail-era core and its newer development sit blocks apart, with very different ductwork underneath — we don't assume one matches the other.
What we handle in Lisle
Everything FortHouse does, available to Lisle homeowners directly — not routed through a regional dispatcher two counties over.
AC repair & AC maintenance
Same-day AC repair when the air stops running cold, and AC maintenance that accounts for how heavy tree cover near the Morton Arboretum changes a home's cooling load — static pressure, refrigerant charge, amp draw, not just a filter swap.
Furnace repair & heating maintenance
Furnace repair and gas furnace repair with a combustion safety check on every visit, whether the house sits in Lisle's older rail-era core or the newer development blocks away.
HVAC installation & replacement
Full HVAC installation and replacement, Manual J–sized for the very different heat loads Lisle mixes in one village — shaded residential lots near the Arboretum and commercial buildings along the tech corridor.
Ductless mini-split installation
Ductless AC installation and mini-split installation for additions and garages, sized around the heavier tree cover that comes with being "The Arboretum Village."
Common questions
Lisle, IL — frequently asked.
What HVAC services does FortHouse offer in Lisle, IL?
AC repair, AC maintenance, furnace repair, heating installation, full HVAC replacement, and ductless mini-split installation — the same services listed on our services page.
See all HVAC servicesDo you offer emergency HVAC repair in Lisle?
Yes — 24/7, including nights, weekends, and holidays. A furnace failure in January or an AC failure in a July heat wave doesn't wait for business hours.
Read more about our emergency HVAC serviceHow much does AC repair cost in Lisle, IL?
Most AC repairs fall between $150 and $600 — a blown capacitor costs far less than a failed compressor. We diagnose first and write the quote for the actual part, whether the system sits in a shaded lot near the Arboretum or an open one near the tech corridor.
See AC repair details for LisleHow much does furnace repair cost in Lisle, IL?
Most furnace repairs also run $150–$600, depending on whether it's an ignitor, a flame sensor, or something bigger like an inducer motor. Every visit includes a combustion safety check at no extra charge.
See furnace repair details for LisleDoes heavy tree cover near the Arboretum affect my AC?
It can — a heavily shaded lot has a different cooling load than an open subdivision, which changes both sizing on a new install and how a system should be running day to day. It's one more variable we account for on a Manual J out here, not an afterthought.
See how AC replacement sizing worksWhat areas near Lisle do you serve?
Plainfield, Naperville, Yorkville, Bolingbrook, Oswego, Wheaton, Minooka, Shorewood, and Aurora, alongside Lisle. If you're just outside that list, call anyway — we make exceptions for a reasonable drive.
See our full service areaHow we work
You call, we diagnose with real measurements, you get a flat written number before anything starts, then we fix it and put the post-repair readings on the invoice next to the originals. See the full four-step process.
Where we work
HVAC Service Areas Near Lisle, IL
We keep the radius tight on purpose. A tech who is twenty minutes away can actually get to you the same day, and already knows how the housing stock out here is built.
Not on the list? Call and ask — we make exceptions.
We install and service
Book a visit
Tell Us What the System Is Doing
Describe the symptom and we will tell you what it usually means, what it typically costs, and the earliest available appointment. No obligation on the call.
- Weekdays
- 7:00 AM – 7:00 PM
- Saturday
- 8:00 AM – 4:00 PM
- Emergency
- 24 hours, 7 days
- Ownership
- Family-owned