AC & heating repair · Joliet, Illinois
AC repair and HVAC service in Joliet, IL
AC quit, heat pump struggling, or a system near the end of its life? In Joliet, 12% of homes heat with electricity[1] and half were built before 1985. Request service from HVAC contractors working here. Joliet, in Will County and Kendall County — ZIPs 60436, 60431, 60435, 60421, 60586, 60432, 60433, counts 152,241 residents (2025 estimate)[2].
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The Joliet HVAC picture in brief
- Population (2025 est.)
- 152,241[2]+1.2% since 2020
- County
- Will / Kendall[2]city spans more than one county
- Land area
- 66.3 sq mi[3]
- Homes heated with electricity
- 12%[1]the 6th-lowest share of the 15 Chicago-area suburbs we cover
- Homes heated with utility gas
- 86%[1]plus 1% propane/LP
- Heat & excessive-heat days, will zone
- 3[4]2016–2025
- Winter-storm & freeze days, will zone
- 13[4]2016–2025; heating demand and freeze-related furnace failures
- Lightning-damage reports within 10 mi
- 4[4]2016–2025; power surges damage HVAC control boards
- Damaging-wind reports within 10 mi
- 126[4]2016–2025; wind-blown debris damages outdoor condenser units
- Homes built before 2000
- 70%[1]of 53,814 housing units
- Median year built
- 1985[1]the 6th-newest of the 15 Chicago-area suburbs we cover
Reading the Joliet data for HVAC
Joliet is one of the fastest-growing Chicago-metro suburbs tracked here: 152,241 people (2025 estimate), up 1.2% since 2020[2]. On the map that's 66.3 square miles holding 2,298 residents per square mile, the 15th densest of the suburbs here; it spans Will County and Kendall County, with ZIP codes 60436, 60431, 60435, 60421, 60586, 60432, 60433[3].
Only 6% of Joliet's homes were built in 2010 or later, against 70% before 2000[1] — most systems here are past any builder warranty, and older homes often keep their original ductwork.
7 ZIP codes cover Joliet — 60436 (17% of the city's land), 60431 (16% of the city's land), 60435 (14% of the city's land), 60421 (13% of the city's land), 60586 (13% of the city's land), 60432 (8% of the city's land), 60433 (7% of the city's land)[5].
The closest tracked neighbours are Bolingbrook (12.0 mi N), Naperville (16.1 mi N) and Orland Park (16.2 mi NE)[3].
12% of occupied Joliet homes heat with electricity, 86% with utility gas[1] — the 6th-lowest electric share of the 15 Chicago-area suburbs we cover; nearby, Bolingbrook (8%), Naperville (12%), and Orland Park (9%) heat electrically. Gas heat means a furnace plus a separate AC condenser.
Will County forecast zone, 2016–2025: 3 heat or excessive-heat days (latest Jul 19, 2019) and 13 winter-storm or hard-freeze days[4]. Nearby: Bolingbrook (3) and Orland Park (4).
Storm exposure for HVAC hardware: 4 lightning-damage reports within 10 miles; 126 damaging-wind reports within 10 miles in 2016–2025[4]. Most recent: Sep 21, 2025, 9.3 miles from the city center.
70% of Joliet's 53,814 housing units were built before 2000 and 6% since 2010[1] (pre-2000 share nearby: Bolingbrook (74%), Naperville (77%), and Orland Park (76%)). Older homes often keep original ductwork.
Out of the 15 suburbs on this site, Joliet has the 3rd-fewest damaging-wind reports nearby (126)[4].
How air moves through a central system
Return, filter, air handler, supply ducts: a clogged filter slows the whole loop.
Joliet storm calendar
Within 10 miles of Joliet, 2016–2025: 126 damaging-wind reports and 4 lightning reports[4]. Peak: 64% in June, July, and August. Busiest year 2020 (24). Busiest month July 2024 (12). Latest: damaging-wind report, Sep 21, 2025, 3.9 mi out.
| Month | Damaging wind | Lightning | All |
|---|---|---|---|
| Feb | 1 | – | 1 |
| Mar | 13 | – | 13 |
| Apr | 2 | – | 2 |
| May | 17 | 1 | 18 |
| Jun | 19 | – | 19 |
| Jul | 39 | 1 | 40 |
| Aug | 22 | 2 | 24 |
| Sep | 11 | – | 11 |
| Nov | 1 | – | 1 |
| Dec | 1 | – | 1 |
Finding HVAC help around Joliet
AC & heating repair contractors taking requests around Joliet cover ZIP codes 60436, 60431, 60435, 60421, 60586, 60432, 60433.
Before you pick up the phone: repair or replace? what a good hvac visit covers
The data underneath this Joliet page
| Measure | Joliet | Median of 15 | Difference |
|---|---|---|---|
| Propane / LP heat | 0.9% | 1.3% | about the same |
| Damaging-wind reports (10 mi) | 126 | 179 | 53 fewer |
| Built before 2000 | 70% | 85% | 14 pts lower |
| Electric heat | 12% | 13% | 1 pts lower |
| Utility-gas heat | 86% | 84% | 2 pts higher |
| Median year built | 1985 | 1977 | 8 years newer |
| Built 2010 or later | 6% | 6% | same as median |
Largest differences first. Medians are the middle value across the covered Chicago-area suburbs, from the same sources.
| City | Heat days | Freeze days | Lightning reports | Damaging-wind reports |
|---|---|---|---|---|
| Joliet | 3 | 13 | 4 | 126 |
| Bolingbrook 12.0 mi | 3 | 13 | 8 | 176 |
| Naperville 16.1 mi | — | — | 6 | 198 |
| Orland Park 16.2 mi | 4 | 20 | 1 | 113 |
| Tinley Park 18.1 mi | 4 | 20 | 0 | 91 |
| Aurora 18.6 mi | 7 | 55 | 2 | 212 |
| Date | Wind | Distance |
|---|---|---|
| Sep 21, 2025 | 63 mph (est.) | 9.3 mi |
| Sep 21, 2025 | 58 mph (est.) | 3.9 mi |
| Aug 16, 2025 | 64 mph (est.) | 7.0 mi |
| Aug 16, 2025 | 64 mph (est.) | 9.2 mi |
| Aug 16, 2025 | 60 mph (est.) | 7.2 mi |
| Jul 24, 2025 | 63 mph (est.) | 7.8 mi |
| Date | Distance |
|---|---|
| Aug 16, 2025 | 7.6 mi |
| Aug 18, 2025 | 7.6 mi |
| Jul 28, 2021 | 5.9 mi |
| May 14, 2020 | 6.9 mi |
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 43,980 | 86.1% | ±781 |
| Electricity | 6,201 | 12.1% | ±574 |
| Bottled or tank gas (propane, butane, etc.) | 444 | 0.9% | ±134 |
| No fuel used | 253 | 0.5% | ±107 |
| Other fuel | 137 | 0.3% | ±77 |
| Solar energy | 40 | 0.1% | ±35 |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 371 | 0.7% | ±141 |
| 2010 to 2019 | 2,766 | 5.1% | ±392 |
| 2000 to 2009 | 12,913 | 24.0% | ±750 |
| 1990 to 1999 | 9,476 | 17.6% | ±591 |
| 1980 to 1989 | 2,941 | 5.5% | ±401 |
| 1970 to 1979 | 4,428 | 8.2% | ±459 |
| 1960 to 1969 | 4,831 | 9.0% | ±443 |
| 1950 to 1959 | 5,081 | 9.4% | ±465 |
| 1940 to 1949 | 2,543 | 4.7% | ±332 |
| 1939 or earlier | 8,464 | 15.7% | ±611 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 53,814 |
| Detached single-family | 37,403 (70%) |
| Occupied homes | 51,055 |
| Owner-occupied | 37,640 (74%) |
| Renter-occupied | 13,415 (26%) |
| Median home value | $265,800 |
ACS 2020–2024 estimates.
| ZIP (ZCTA) | Share of Joliet's land | Share of the ZIP inside the city |
|---|---|---|
| 60436 | 17% | 62% |
| 60431 | 16% | 79% |
| 60435 | 14% | 86% |
| 60421 | 13% | 14% |
| 60586 | 13% | 47% |
| 60432 | 8% | 63% |
| 60433 | 7% | 35% |
Dated heat and freeze records for the WILL forecast zone: see the county list.
Common Joliet HVAC questions
Are heat pumps common in Joliet?
12% of Joliet homes heat with electricity[1], which means a heat pump or electric resistance heat.
How old are Joliet's homes — and their HVAC systems?
The median home dates to 1985, and 6% were built in 2010 or later[1]. Your own system may have been replaced since — the outdoor unit's data plate shows when it was made.
Which Joliet ZIP codes are covered?
60436, 60431, 60435, 60421, 60586, 60432, and 60433[5], Will County. Nearby pages: Bolingbrook (12.0 mi), Naperville (16.1 mi), and Orland Park (16.2 mi)[3].
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- NOAA Storm Events Database
- Census 2020 ZCTA–place file
Data pulled Sep 28, 2026. Full citations and method.