Logan County, Oklahoma

Guthrie, Crescent and Cashion

Logan County has some of the oldest houses I work on and some of the newest acreage builds, sometimes on the same road. Guthrie in particular takes patience and the right approach.

4.8 stars · 300+ Google reviews · 15+ years · 6,500+ jobs completed · Se habla espanol

1889 TOWN
Service call
$210
$99 dispatch plus $111 diagnostic. Flat, and not credited toward the repair.
After hours
$309
$198 dispatch plus $111 diagnostic. Residential AC, heating, heat pumps.
Geothermal
$348
Flat, weekday or after hours. New system evaluations are free.
Where I work in Logan County

The towns, and what I have actually done there

These are completed job counts from my own records, not a list of places I would be willing to drive. Logan County is inside the seven counties I cover every day.

  • Crescent31 jobs completed here. West side, closest to my shop.
  • Cashion20 jobs completed here. On the Kingfisher line, I work both sides.
  • Guthrie7 jobs completed here. County seat. Historic district and new builds.
  • LangstonEast, out toward the university.
  • MarshallNorth end of the county.
Recent work

Jobs from around Logan County

Air handler data label, HVAC system install in Guthrie, OK
Guthrie.
Outdoor unit data label, HVAC system install in Guthrie, OK
Guthrie.
Outdoor condenser with service tools, HVAC system install in
Guthrie.
A clamp meter hanging in the opened control section of a com
Guthrie.
Hartzell's Heat and Air job in Crescent, Oklahoma
Crescent.
Hartzell's Heat and Air job in Crescent, Oklahoma
Crescent.
Hartzell's Heat and Air job in Crescent, Oklahoma
Crescent.
Hartzell's Heat and Air job in Crescent, Oklahoma
Crescent.
Your electric bill

OEC and the co-ops through Logan County

Logan County is largely cooperative territory, and Oklahoma Electric Cooperative runs rebate programs for both geothermal and air source heat pumps for its members. Program amounts move and eligibility depends on the equipment and the efficiency tier, so it is worth checking before you buy rather than after.

Your ZIP and your electric provider, and I will confirm the current program with the co-op before quoting a number. Start with the rebate finder, or see the Oklahoma rate history for what your provider has actually charged.

Local reality

What I see on Logan County calls

  • Guthrie's historic homesPlaster walls, no good chase, and often no room for standard ductwork. Mini splits and high velocity systems solve what a normal changeout cannot.
  • Additions on old housesA 1900 house with a 1975 addition and a 2015 kitchen usually has three different comfort problems, not one.
  • New acreage buildsCrescent and north Guthrie acreages are good geothermal candidates because there is room for the loop.
  • Long rural drivesCrescent is a short run from my shop; the east side of the county is not. I will tell you my honest arrival time.
What I do here

Everything from a no cool call to a new system

Most calls

Repair

AC, heating, heat pumps, water heaters and controls. I find the failure, price the repair in writing, and fix it.

$210 flatAC repair
Ground source

Geothermal

Design, sizing, loop layout and service. I travel most of Oklahoma for geothermal, as availability allows.

Diagnostic $348 flatGeothermal
When it is time

Replace

I look at the house and the ductwork before anybody talks price. Installs carry a 1 year parts and labor warranty.

Estimate freeReplacement

Light commercial is $389 flat, day or night, up to fifteen tons. Repairs carry my 6 month labor guarantee, and every new system I install carries 1 year parts and labor.

  • Heating and furnace repairGas and propane furnaces, heat pumps and electric heat. No heat calls go first in cold weather, and after hours is $309 total.
  • AC repair and serviceCapacitors, contactors, condenser fan motors, blower motors, refrigerant leaks found and repaired rather than topped off, and compressor diagnostics. All brands.
  • System replacementA Manual J load calculation on every replacement, not a guess from the old nameplate. Trane, RunTru, Mitsubishi, ClimateMaster, Daikin, Carrier, Amana. Installs carry 1 year parts and labor.
  • GeothermalDesign, sizing, loop layout, install and service. IGSHPA accredited, ClimateMaster GeoElite, WaterFurnace and GeoStar. Diagnostic $348 flat, any hour.
  • Ductless mini splitsMitsubishi Diamond Dealer. Registered inside 90 days on a single family home, a Mitsubishi system carries 12 years on parts and compressor. Right for additions and rooms the ductwork never reached.
  • Maintenance plansSeasonal visits, filters installed while I am there, 10% off repairs up to $300 on the plans that carry it. Plans start at $199 a year.
  • Water heatersGas and electric tank water heaters, plus geothermal desuperheater hookups. Diagnostic is $210 if the truck rolls for it, $149 if I am already on site.
  • Light commercialRooftop units, restaurants, retail and shops. $389 flat, day or night, up to fifteen tons, bookable online. Larger equipment gets sized by the tech on site.
New refrigerants

What changed on new equipment

New systems now ship with R-454B or R-32 instead of R-410A. Both are mildly flammable A2L refrigerants, both cost meaningfully more per pound than R-410A did, and both need the right recovery equipment and handling. I stock and work on both, and I will tell you which one your new system uses before you buy it.

On an older R-410A or R-22 system the question is usually whether to keep repairing it. I look at age, the failure and what else is tired, then tell you what I would do if it were my house. There is a rebuild option between repair and replacement too. More on the refrigerant change · How a rebuild works

Water heaters in Logan County

Hard water is what kills them here

Oklahoma hard water runs about 15 to 25 grains per gallon across my service area. That sediment settles in the bottom of the tank, insulates the burner or the element from the water it is supposed to heat, and shortens the life of the whole thing. I service gas and electric tank water heaters, and geothermal desuperheater hookups.

A water heater diagnostic is $210 if the truck rolls for it, or $149 if I am already at your house on another job. The annual plan is WH 360 at $199 a year. Tankless has no public price: tell me the brand, the model and what it is doing, and I will get you a real answer. Water heater plans

Who is coming out

The credentials, and what they are for

I am Dave Hartzell. I started in this trade at sixteen and a half working for my dad, which puts me at 47 years, and I have run my own shop in Kingfisher for 15+ years. I am not a franchise and I am not a call center. When I say I will look at it, I am the one looking at it.

Master HVAC License
Oklahoma state licensed
NATE Certified
Third party certified, not just factory trained
IGSHPA Accredited
Ground source heat pump accreditation
Trane TCS SELECT
Factory trained and recertified every year
Mitsubishi Diamond Dealer
M-Series and P-Series ductless, multi zone and hyper heat
ClimateMaster GeoElite
Plus WaterFurnace and GeoStar geothermal
Amana Brand Advantage
Residential equipment
BBB A+ for 11 years
And 4.8 stars across 300+ Google reviews
Local history

What Logan County is right now

Logan County has become one of my most active areas, and it is changing fast. Guthrie and the Cashion corridor are growing at a pace I have not seen here before: new subdivisions, new commercial buildings, people moving north out of the city. I put systems in new construction here regularly, and I would rather be in early when the duct layout can still be done right.

Then there is Guthrie itself. Oklahoma's first state capital, and the whole downtown is a historic district. Those Victorian houses are beautiful and the HVAC work takes patience: crawl space ductwork, thick plaster walls, closets that are not a standard size, original floor registers, radiators that somebody converted decades ago. Every one is a different job. After 47 years I enjoy the puzzle.

Mini splits solve a lot of it. When a house was never built for ducts, forcing ducts into it is the expensive way to get a worse result.

Geothermal in Logan County

Free evaluations, Saturday and Sunday included

Logan County acreage takes a horizontal loop well, and I have geothermal in this county I still service. The evaluation, the sizing and the loop layout are free to look at, Saturday and Sunday included.

I am IGSHPA accredited, a ClimateMaster GeoElite dealer and a WaterFurnace and GeoStar dealer. I design the loop and size the system myself. My OWRB licensed driller does the drilling. What geothermal costs a month · Farm and ranch geothermal

Frequently asked

Logan County questions

Do you provide HVAC service in Guthrie?

Yes, Guthrie, Crescent, Cashion, Langston and Marshall. Crescent and Cashion are a short run from my shop in Kingfisher.

What does an AC repair cost in Guthrie?

$210 flat for the service call, which is $99 dispatch plus $111 diagnostic. The diagnostic is not credited toward the repair. After hours is $309. Repairs are quoted in writing before I start.

Can you work on Guthrie's historic homes?

That is most of what makes Guthrie different. Plaster, no duct chases and rooms added over a century. Ductless mini splits and careful zoning usually beat forcing standard ductwork into a house that never had it.

Does OEC offer rebates in Logan County?

Oklahoma Electric Cooperative does run geothermal and heat pump rebate programs for members, with the amount varying by efficiency. Give me your ZIP and provider and I will confirm the live program before quoting anything.

Can you install geothermal in Logan County?

Yes, and the acreage around Crescent and north Guthrie suits a horizontal loop. Geothermal evaluation and sizing are free including weekends, and a diagnostic on an existing system is $348 flat.

Do you handle new construction in Logan County?

Yes. I would rather be in early, when the duct layout can still be done right, than be called after the drywall is up to fix a system that was never sized for the house.

Do you provide emergency heating service in Logan County?

Yes. After hours is $309, which is $198 dispatch plus the $111 diagnostic. If you smell gas or a carbon monoxide alarm sounds, get out of the house first, call the gas utility or 911, then call me.

What is different about Cashion and Crescent versus Guthrie?

Crescent and Cashion are the closest part of the county to my shop and they run to acreage, which makes geothermal easy. Guthrie is older housing and a historic district, which makes the work more about fitting a system into a house that never had one.

Do you work with builders in Logan County?

Yes, and I book out fast in spring. Get me in while the duct layout can still be changed and the finished house works the way it should.

Are mini splits a good answer in a Guthrie historic home?

Often the best answer. When a house was never built for ductwork, a ductless system heats and cools the room without tearing up plaster or stealing closet space.

Logan County

Tell me what it is doing

Describe the noise, the smell, or the temperature it will not hold, and I will tell you straight what I think it is before I drive out. Same day where the schedule allows.

Call 405-375-4822

Serving Crescent, Cashion, Guthrie, Langston, Marshall and the country between them. My other counties: Kingfisher, Canadian, Oklahoma, Garfield, Major, Logan, Blaine.

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