AC & heating repair · Kirkwood, Missouri
AC repair and HVAC service in Kirkwood, MO
AC quit, heat pump struggling, or a system near the end of its life? In Kirkwood, 22% of homes heat with electricity[1] and half were built before 1962. Request service from HVAC contractors working here. Kirkwood, in St. Louis County — ZIP 63122, counts 29,331 residents (2025 estimate)[2].
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The Kirkwood HVAC picture in brief
- Population (2025 est.)
- 29,331[2]-0.5% since 2020
- County
- St. Louis[2]
- Land area
- 9.2 sq mi[3]
- Homes heated with electricity
- 22%[1]the 5th-lowest share of the 15 St. Louis–area suburbs we cover
- Homes heated with utility gas
- 75%[1]plus 1% propane/LP
- Heat & excessive-heat days, st. louis zone
- 21[4]2016–2025
- Winter-storm & freeze days, st. louis zone
- 12[4]2016–2025; heating demand and freeze-related furnace failures
- Lightning-damage reports within 10 mi
- 3[4]2016–2025; power surges damage HVAC control boards
- Damaging-wind reports within 10 mi
- 79[4]2016–2025; wind-blown debris damages outdoor condenser units
- Homes built before 2000
- 81%[1]of 12,978 housing units
- Median year built
- 1962[1]the 3rd-oldest of the 15 St. Louis–area suburbs we cover
What Kirkwood's numbers say about HVAC
Kirkwood counts 29,331 residents (2025 estimate), growing at a middle-of-the-pack -0.5% since 2020[2]. On the map that's 9.2 square miles holding 3,194 residents per square mile, the 5th densest of the suburbs here; it sits entirely in St. Louis County, with ZIP code 63122[3].
Only 9% of Kirkwood's homes were built in 2010 or later, against 81% before 2000[1] — most systems here are past any builder warranty, and older homes often keep their original ductwork.
The entire city sits in ZIP code 63122[5].
The tracked suburbs closest by are Webster Groves (3.6 mi E), Ballwin (7.1 mi W) and University City (7.7 mi NE)[3].
22% of occupied Kirkwood homes heat with electricity, 75% with utility gas and 1% with propane[1] — the 5th-lowest electric share of the 15 St. Louis–area suburbs we cover; nearby, Webster Groves (20%), Ballwin (14%), and University City (19%) heat electrically. Gas heat means a furnace plus a separate AC condenser.
St. Louis County forecast zone, 2016–2025: 21 heat or excessive-heat days (latest Aug 16, 2025) and 12 winter-storm or hard-freeze days[4].
Storm exposure for HVAC hardware: 3 lightning-damage reports within 10 miles; 79 damaging-wind reports within 10 miles in 2016–2025[4]. Most recent: Jun 27, 2025, 4.5 miles from the city center.
81% of Kirkwood's 12,978 housing units were built before 2000 and 9% since 2010[1] (pre-2000 share nearby: Webster Groves (95%), Ballwin (92%), and University City (94%)). Older homes often keep original ductwork.
Measured against the 15 suburbs on this site, Kirkwood records the 3rd-oldest housing (by median year built) (1962)[1].
How air moves through a central system
Return, filter, air handler, supply ducts: a clogged filter slows the whole loop.
Kirkwood storm calendar
Within 10 miles of Kirkwood, 2016–2025: 79 damaging-wind reports and 3 lightning reports[4]. Peak: 63% in May, June, and July. Busiest year 2023 (21). Busiest month July 2023 (9). Latest: damaging-wind report, Jun 27, 2025, 0.6 mi out.
| Month | Damaging wind | Lightning | All |
|---|---|---|---|
| Mar | 5 | – | 5 |
| Apr | 10 | – | 10 |
| May | 15 | – | 15 |
| Jun | 17 | – | 17 |
| Jul | 19 | 1 | 20 |
| Aug | 9 | 1 | 10 |
| Sep | – | 1 | 1 |
| Oct | 2 | – | 2 |
| Nov | 1 | – | 1 |
| Dec | 1 | – | 1 |
Finding HVAC help around Kirkwood
AC & heating repair contractors taking requests around Kirkwood cover ZIP code 63122.
Before you call: repair or replace? what a good hvac visit covers
The Kirkwood numbers behind this page
| Measure | Kirkwood | Median of 15 | Difference |
|---|---|---|---|
| Built 2010 or later | 9% | 6% | 3 pts higher |
| Electric heat | 22% | 29% | 7 pts lower |
| Propane / LP heat | 1.1% | 1.4% | about the same |
| Utility-gas heat | 75% | 69% | 7 pts higher |
| Damaging-wind reports (10 mi) | 79 | 72 | 7 more |
| Built before 2000 | 81% | 83% | 2 pts lower |
| Median year built | 1962 | 1977 | 15 years older |
Sorted by largest difference. Each median is the middle value across the covered St. Louis–area suburbs, from the same sources.
| City | Lightning reports | Damaging-wind reports |
|---|---|---|
| Kirkwood | 3 | 79 |
| Webster Groves 3.6 mi | 2 | 76 |
| Ballwin 7.1 mi | 1 | 72 |
| University City 7.7 mi | 2 | 92 |
| Maryland Heights 9.9 mi | 1 | 90 |
| Chesterfield 10.0 mi | 1 | 84 |
| Date | Wind | Distance |
|---|---|---|
| Jun 27, 2025 | 69 mph (est.) | 4.5 mi |
| Jun 27, 2025 | 58 mph (est.) | 0.6 mi |
| May 19, 2025 | 69 mph (est.) | 9.1 mi |
| May 16, 2025 | 60 mph | 5.7 mi |
| May 16, 2025 | 69 mph (est.) | 8.8 mi |
| May 16, 2025 | 69 mph (est.) | 5.1 mi |
| Date | Distance |
|---|---|
| Aug 26, 2021 | 8.9 mi |
| Jul 19, 2020 | 9.7 mi |
| Sep 8, 2018 | 5.6 mi |
| Main heating fuel | Homes | Share | Margin of error |
|---|---|---|---|
| Utility gas | 9,047 | 75.4% | ±425 |
| Electricity | 2,697 | 22.5% | ±401 |
| Bottled or tank gas (propane, butane, etc.) | 135 | 1.1% | ±82 |
| Solar energy | 51 | 0.4% | ±47 |
| No fuel used | 41 | 0.3% | ±33 |
| Other fuel | 11 | 0.1% | ±17 |
| Wood | 8 | 0.1% | ±15 |
| Fuel oil, kerosene, etc. | 2 | 0.0% | ±4 |
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 265 | 2.0% | ±121 |
| 2010 to 2019 | 858 | 6.6% | ±212 |
| 2000 to 2009 | 1,320 | 10.2% | ±326 |
| 1990 to 1999 | 498 | 3.8% | ±134 |
| 1980 to 1989 | 923 | 7.1% | ±175 |
| 1970 to 1979 | 1,375 | 10.6% | ±270 |
| 1960 to 1969 | 1,589 | 12.2% | ±256 |
| 1950 to 1959 | 2,623 | 20.2% | ±350 |
| 1940 to 1949 | 1,383 | 10.7% | ±296 |
| 1939 or earlier | 2,144 | 16.5% | ±270 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| Measure | Value |
|---|---|
| Housing units | 12,978 |
| Detached single-family | 9,693 (75%) |
| Occupied homes | 11,992 |
| Owner-occupied | 9,254 (77%) |
| Renter-occupied | 2,738 (23%) |
| Median home value | $451,400 |
ACS 2020–2024 estimates.
| ZIP (ZCTA) | Share of Kirkwood's land | Share of the ZIP inside the city |
|---|---|---|
| 63122 | 100% | 63% |
Dated heat and freeze records for the ST. LOUIS forecast zone: see the county list.
Kirkwood HVAC questions
Are heat pumps common in Kirkwood?
22% of Kirkwood homes heat with electricity[1], which means a heat pump or electric resistance heat.
How old are Kirkwood's homes — and their HVAC systems?
The median home dates to 1962, and 9% 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 Kirkwood ZIP codes are covered?
63122[5], St. Louis County. Nearby pages: Webster Groves (3.6 mi), Ballwin (7.1 mi), and University City (7.7 mi)[3].
A lot of Kirkwood homes predate 1980 — what does that mean for HVAC equipment work?
70% of Kirkwood's housing units were built before 1980, 47.4% before 1960[1] — the 4th-highest share of the 15 St. Louis–area suburbs we cover. The ductwork in an older house is often original even when the equipment is not — ask for a duct leakage check with any replacement quote.
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.