Missouri
Heating and Cooling in Franklin County, MO
Heating and cooling in Franklin County, MO is rural, electric and varied: 68 percent of occupied homes heat with electricity, 11 percent with propane and 4 percent with wood. Kenan Corporation is about 1 hour 40 minutes from Union, the county seat, so a phone call comes first.

- 4.6★ on Google29 reviews
- A+ BBB ratingNot BBB accredited
- Founded in 2010Repair-first advice
- Open 24 hoursCall any time
Heating and cooling in Franklin County, MO is mostly electric, rural and spread out. The Census Bureau's 2020-2024 American Community Survey counts 46,312 housing units in 931 square miles, and 68 percent of occupied homes heat with electricity. Kenan Corporation drives about 1 hour 40 minutes from our base near Spanish Lake to Union, the county seat, in normal traffic. That is among the longest trips we make, so every Franklin County job starts with a call about the equipment, the road and the access.
Electric, propane and wood: what the heating mix means for repairs
The ACS shows heating fuel across the county: 29,098 homes on electricity, 6,512 on utility gas, 4,667 on propane, 1,766 on wood and 481 on fuel oil. Median build year is 1984, 76 percent of units are detached houses, and 9 percent, about 4,160, are manufactured homes.
Each fuel gets its own repair path. A heat pump has a defrost board, a reversing valve and a contactor. An electric furnace has strips and sequencers. A propane furnace has a tank, a regulator and an orifice sized for LP gas, and a gas smell means leaving the house and calling 911 first. Wood adds a stove, a flue and, in some houses, a furnace behind it. Our polar vortex prep guide covers the cold-week checks that apply to all of them.

Jobs on farms, shops and rural lots
Five kinds of work come up most outside the towns.

Heat Pump Repair
Electricity heats 68 percent of occupied Franklin County homes, so heat pump defrost faults, frozen coils and aging electric strips are the leading winter calls.
Learn more →
Furnace Repair
About 4,700 county homes heat with propane and another 6,500 with utility gas, and a propane furnace needs its orifice, regulator and tank pressure checked, unlike a natural gas unit.
Learn more →
Heat Pump Installation
Ameren's 2026 chart pays for qualifying air-source heat pumps only to Ameren customers, while Crawford and Three Rivers cooperative members need to ask their own co-op about programs.
Learn more →
Ductless Mini Split Installation
Detached shops, barns, additions and farmhouse rooms far from the main duct trunk can cool and heat with a ductless head instead of long duct runs.
Learn more →
Commercial HVAC Repair
Small commercial buildings, including shops and winery tasting rooms in the county's wine region, run split systems and packaged units that need diagnosis before anyone orders parts.
Learn more →
Furnace Replacement
About 4,600 county homes, 10 percent, date to 1939 or earlier, and a farmhouse that has been added onto needs a load calculation before a replacement furnace is sized, not a like-for-like swap.
Learn more →
Furnace Maintenance
With 4,667 propane and 6,512 utility gas homes in the county, a fall burner, blower and flue check beats a January no-heat call that is about 1 hour 40 minutes from our base.
Learn more →
Farmhouses, 1980s ranches and the sizing question
Franklin County grew from 80,603 residents in 1990 to 104,682 in 2020, according to census figures, and the median home dates to 1984. A house that old is now on its second or third furnace. About 4,600 homes, 10 percent, date to 1939 or earlier.
A farmhouse that has been added onto, a porch closed in or a shop attached is not the house the old furnace was sized for. A load calculation before replacement is how the equipment gets matched to the rooms that exist now. Ask any contractor to show the numbers, including us.
Building permits, cities and what to ask first
Franklin County's Building Department at 400 East Locust in Union, 636-583-6384, issues permits and inspects new construction in unincorporated areas. Its posted code list includes the 2021 International Mechanical Code with a county amendment, but it does not post an HVAC contractor license, so call before work starts. Washington, Union, Pacific and the other cities may run their own offices, so confirm which one covers your address.
With no statewide HVAC license in Missouri, the license a contractor needs depends on the address. Ask any contractor, including us, which one applies in Franklin County, and look for the permit holder's name in the quote.

Gray Summit, Villa Ridge, Pacific and Sullivan: which office applies
Villa Ridge, Gray Summit, Stanton and Lake St. Clair are census-designated places, not cities, so no city building office covers them and the county Building Department is the one to ask. Pacific has a small part in St. Louis County, and Sullivan lies only partly in Franklin County, so a permit there can fall under a different county's rules.
The county's permit packet includes an Electrical and Mechanical Spec Sheet, and its code list names the 2021 International Mechanical Code with a county amendment. The page describes permits for new construction, not a furnace swap in an existing house, so call 636-583-6384 before assuming either way.
What the call looks like from 100 minutes away
Tell us the address, the road and gate access, the equipment type and the fuel. Diagnosis comes before parts, the explanation is in plain words, and a clear, upfront quote arrives before work starts. We offer same-day service when the schedule allows, and when it does not, we say so on the call.
Shops, tasting rooms and other small commercial buildings
Manufacturing employs about 23.8 percent of Franklin County workers, mostly in Washington and Union, and the Hermann wine region, designated in 1983, reaches vineyards near Berger and New Haven. Those shops, plants and tasting rooms are light commercial buildings. Their split systems and packaged units get a diagnosis first, and a clear, upfront quote follows before any parts are ordered.
Rivers, I-44 and the utilities behind the meter
The county is Ozark terrain with caves, springs and sinkholes, with the Missouri River on its north edge and I-44 as its growth corridor. Ameren Missouri, Crawford Electric Cooperative and Three Rivers Electric Cooperative all serve parts of the county, so check your bill. We list a page for Washington. See heat pump repair and ductless mini splits.
Need heating or cooling help in Franklin County?
Call and tell us what the system is doing. You will get a clear, upfront quote before work starts.
- 4.6★ on Google29 reviews
- A+ BBB ratingNot BBB accredited
- Founded in 2010Repair-first advice
- Open 24 hoursCall any time
Kenan Corporation
927 Broadhead Lane, St. Louis, MO 63138
Open 24 hours, every day
Cities in Franklin County
Heating and Cooling in Franklin County: common questions
Does Franklin County license HVAC contractors?
The county's Building Department at 400 East Locust in Union, 636-583-6384, issues permits and inspects new construction in unincorporated Franklin County and lists the 2021 International Mechanical Code with a county amendment. Its posted pages do not name an HVAC license, so call before work starts. Cities such as Washington and Union may run their own offices, so confirm for your address.
What fuels do Franklin County homes use to heat?
The Census Bureau's 2020-2024 survey shows 68 percent electricity, 15 percent utility gas, 11 percent propane, about 4 percent wood and about 1 percent fuel oil. That mix explains why heat pumps, propane furnaces and wood-stove backups all appear on service calls here, and why each needs a different diagnosis.
Which electric company serves my Franklin County home?
Ameren Missouri serves the most customers, but Crawford Electric Cooperative and Three Rivers Electric Cooperative also serve parts of the county. Check your bill. Ameren's 2026 heat pump rebates apply only to Ameren customers, so co-op members should ask their own co-op before buying equipment.
Can you come to Franklin County, and how long does it take?
Yes, but call first. Union is about 1 hour 40 minutes from our base near Spanish Lake in normal traffic and Washington about 1 hour 45 minutes. We are open 24 hours and offer same-day service when the schedule allows, but we confirm timing, access and the equipment type with you before we leave.
Talk to an HVAC specialist
Tell us what your system is doing and where you are. Open 24 hours.
Kenan Corporation, 927 Broadhead Lane, St. Louis, MO 63138. Open 24 hours.
- 4.6★ on Google29 reviews
- A+ BBB ratingNot BBB accredited
- Founded in 2010Repair-first advice
- Open 24 hoursCall any time
What customers say on Google
4.6★ from 29 Google reviews, checked October 2026.
The best in the business!!! So nice, great communication, quick and straight to the point. I can’t recommend Kenan enough!!!
Kenna did an amazing job! I had another company come out and told me I needed a new furnace because my heat was not coming on. Previous company said could be the motor/fan and that would cost $650, which I was ok with. They didn’t check any parts, but was ready to say I should just get a new heating and cooling unit. I knew my neighbor had service done by Kenyan and said he did a great job. He came out and found it was a capacitor that was causing the issue and fixed it. He is awesome and definitely if I need help again, he will be called and I will use his services!




