HVAC System Replacement in Central Oklahoma — Free Estimates & Trane TCS SELECT
Free System Estimates · 0% Financing 60 Months · 4.8 Stars / 271 Reviews
Dave Hartzell spent 12 years at a Watonga HVAC company learning the trade before opening Hartzell’s about 15 years ago. In his 45-year career he has worked on every generation of residential equipment and saw firsthand what an improperly sized, poorly installed system does to a family’s utility bills over 15 years. That experience is why every replacement starts with a Manual J load calculation — no guessing, no oversizing to cover up an airflow problem. Customers in Kingfisher, Yukon, Guthrie, El Reno, and Edmond call for the same reason: they want it sized right, installed right, and warranted by someone who will still be here when they call.
Replacing your HVAC system? Hartzell’s offers Trane, RunTru, and Mitsubishi systems with upfront pricing, code-correct installs, and transferable warranties across central Oklahoma. Free estimates on new installs. Call 405-375-4822.
See also: Heat Pump Installation
✓ Trane Comfort Specialist TCS SELECT
✓ NATE Certified Technicians
✓ IGSHPA Accredited
✓ In Business for 15+ years
✓ Free Estimates
✓ Financing Available
New HVAC System — Starting at $7,500 Installed
Single-story home, compatible existing ductwork, standard installation. Final price confirmed after free on-site survey — no surprises.
Manual J load calc, ductwork inspection, equipment recommendation
RunTru, Trane, Carrier, Mitsubishi, or ClimateMaster — matched to your home
Existing ducts evaluated — modifications quoted upfront if needed
Pulled and handled by Hartzell’s — typically completed in one day
Parts + 6-month labor guarantee — registered same day as install
Free in-home estimate — no obligation, no pressure
What a Replacement Looks Like
Every replacement starts with an honest assessment of what you have and what you actually need. We pull the old equipment, size the new system correctly with a Manual J load calculation, and install it right. Here is what that looks like in the field.
Frequently Asked Questions — HVAC Replacement
How much does HVAC system replacement cost in Oklahoma?
Standard AC and gas furnace replacement runs $7,500–$12,500 installed in central Oklahoma.
A standard AC and gas furnace replacement runs $7,500–$12,500 installed in central Oklahoma. High-efficiency systems run $11,000–$17,000. Heat pump systems (replacing both AC and furnace) run $8,000–$14,000. Dual-fuel heat pump + gas systems run $12,000–$20,000. Geothermal runs $18,000–$35,000 and qualifies for Oklahoma utility rebates through CKenergy and OG&E.
How long does HVAC replacement take?
Most residential HVAC replacements at Hartzell’s are complete in one day.
Most residential HVAC replacements take 4–8 hours and are complete in one day. Hartzell’s arrives with a full crew and all equipment so you’re not without heat or AC overnight. Complex installations (attic air handlers, significant ductwork, geothermal) may take 1–2 days.
When should I replace instead of repair my HVAC system?
Replace when repair cost exceeds 50% of replacement cost, or the system is over 12–15 years old.
Replace when repair cost exceeds 50% of replacement cost, the system is over 12–15 years old, it uses R-22 refrigerant (discontinued in 2020), there have been multiple repairs in the past two years, or the compressor or heat exchanger has failed. Hartzell’s will give you honest numbers on both options.
What HVAC brands does Hartzell’s install?
Hartzell’s is a Trane TCS SELECT dealer and also installs Carrier, Mitsubishi, ClimateMaster geothermal, and RunTru.
Hartzell’s is a Trane Comfort Specialist TCS SELECT dealer and installs the full Trane line. We also install Carrier, RunTru by Trane, Samsung, Mitsubishi Electric (Diamond Dealer), ClimateMaster (geothermal), and Daikin. We’ll recommend the right brand for your situation, not the one with the highest margin.
Does Hartzell’s offer financing for HVAC replacement?
Yes — Hartzell’s offers financing through Synchrony, Wells Fargo, and Wisetack with same-day approval on most applications.
Yes. Hartzell’s offers financing through Synchrony, Wells Fargo Home Projects, and Wisetack. Options include 0% promotional periods and longer fixed-term monthly payment plans. Most approvals are same-day. Ask when you call 405-375-4822.
What warranty comes with a new Trane system from Hartzell’s?
Trane equipment installed by Hartzell’s carries a 12-year parts warranty under the TCS SELECT dealer program.
Trane equipment installed by Hartzell’s carries a 12-year parts warranty — the full TCS SELECT tier benefit. ClimateMaster geothermal systems include a 5-year base warranty; Hartzell’s sells an extended plan covering 10 years parts and labor. We file all warranty registrations on every installation — you don’t have to remember to do it.
Do you credit the diagnostic fee toward the repair?
Yes. If you approve a repair or replacement within 14 days of the diagnostic, the $111 fee is credited toward your invoice. The $99 dispatch fee covers the service call itself and applies regardless.
Can warranties be transferred to a new homeowner?
Most manufacturer warranties on equipment we install are transferable. Contact us within the transfer window — typically 30 to 90 days of the home sale — and we will handle the paperwork.
Manual J load calculation included. No guesswork on sizing.
Get a Free Replacement Estimate
Upfront pricing. No pressure. Same-day appointments available.
Repair or Replace? The Honest Answer.
We’ll tell you straight — not every problem needs a new system. But when the numbers stop making sense on a repair, we’ll show you why replacement wins. Here’s the framework we use:
✓ Repair Makes Sense If…
- System is under 10 years old
- Repair cost is under 30% of replacement
- No refrigerant leaks (R-22 systems excluded)
- System is keeping up with demand
- No prior major repairs in last 2 years
→ Replace Makes Sense If…
- System is 12–15+ years old
- Repair cost exceeds 50% of replacement
- Uses R-22 refrigerant (discontinued)
- Repeated repairs in the past 2 years
- Compressor or heat exchanger failure
- Can’t maintain 75°F on a 100°F day
45 years of HVAC experience. No pressure, no upsell — just honest answers. Get on the schedule before peak season fills up. Call 405-375-4822 or chat with us in the corner.
What a Replacement Costs in Central Oklahoma
These are real installed prices for central Oklahoma in 2026 — equipment, labor, line set, thermostat, and startup included. What affects your number most: system size (tons), efficiency tier, and whether ductwork needs work.
| System Type | Efficiency | Installed Cost | Best For |
|---|---|---|---|
| AC + Gas Furnace (standard) | 14–16 SEER2 / 80% AFUE | $7,500–$12,500 | Most common replacement; 14–16 SEER2 |
| AC + Gas Furnace (high-eff) | 17–20 SEER2 / 96% AFUE | $11,000–$17,000 | 96%+ AFUE furnace; best long-term value |
| Heat Pump System | 16–22 SEER2 | $8,000–$14,000 | Replaces AC + furnace in one unit |
| Dual-Fuel (heat pump + gas) | 18–21 SEER2 | $12,000–$20,000 | Oklahoma’s best all-weather system |
| Geothermal Heat Pump | 300–500% efficiency | $18,000–$35,000 | CKenergy/OG&E utility rebates (federal 25D expired Dec 2025) |
Prices include equipment, labor, refrigerant, thermostat, and startup. Ductwork repair, electrical upgrades, and permit fees are additional. Geothermal qualifies for CKenergy rebates up to $2,000/ton and OG&E up to $1,000/ton.
Why Hartzell’s for Your Replacement
Manual J Load Calculation
Most Oklahoma HVAC failures stem from improperly sized equipment. We run a full ACCA Manual J load calculation on every replacement — your new system will be sized for your actual home, not the old system’s nameplate.
One-Day Installation
Most residential replacements are complete in one day. We arrive with a full crew and the right equipment so you’re not without heat or AC overnight. We also haul away your old system.
Warranty Registration Handled
Trane’s 10-year parts warranty requires registration within 60 days. We file it for you — you don’t have to remember. All paperwork including utility rebate applications is handled by our office.
Honest System Assessment + 6-Month Labor Guarantee
We’ll tell you if your system can be repaired — we don’t push replacement to make a sale. All installation labor is backed by our 6-month labor guarantee. If anything we installed or connected fails due to workmanship within six months, we come back and make it right.
Our Replacement Process
A technician visits, inspects your current system, and evaluates your ductwork. We measure your home and run a Manual J load calculation on-site or back at the office.
You get a written proposal with equipment options, pricing, and what’s included. No vague ranges — actual numbers you can act on.
If you want to finance, we can run an application through Synchrony, Wells Fargo, or Wisetack before the installation day. Most approvals are same-day.
Our crew arrives on time with all equipment and materials. Existing system removed, new system installed, tested, and commissioned. Most homes are done in 4–8 hours.
We verify refrigerant charge, airflow, thermostat operation, and safety controls before we leave. We walk you through the thermostat and show you the filter location.
We file the Trane warranty registration and any utility rebate applications (CKenergy, OG&E) before we leave the job. You get copies of everything.
Financing Your Replacement
A system replacement is a significant purchase. We offer three financing options to fit different situations:
Synchrony Financial
0% promotional periods available. Widely accepted, fast approval. Good for customers with established credit who want to avoid interest.
Wells Fargo
Longer-term fixed monthly payments. Good option for larger projects where you want a predictable payment spread over several years.
Wisetack
Flexible terms, soft credit pull to check options, works for a wider credit range. Good alternative if other lenders don’t work for your situation.
Warranties on New Equipment
Trane equipment installed by a Trane Comfort Specialist TCS SELECT dealer carries a 12-year parts warranty — you get the full 12 years because we hold the TCS SELECT designation. ClimateMaster geothermal systems come with a 5-year base warranty; we sell the extended plan to 10 years parts and labor. We register every system we install — no hoops for you to jump through.
Trane
12-yr parts (TCS SELECT installer required)
Mitsubishi
12-yr compressor / 5-yr parts
Carrier
10-yr parts (registered)
RunTru by Trane
10-yr parts (registered)
ClimateMaster
5-yr base / 10-yr extended parts & labor
ACiQ
10-year parts warranty on compressor and coil (requires online registration within 90 days). 20-year heat exchanger warranty on furnace. Built by ICP — International Comfort Products, a Carrier Global company.
Full warranty details by brand ›
From the Blog
- When to Replace Your HVAC System in Oklahoma
- Heat Pump vs. Gas Furnace: What’s Better for Oklahoma?
- Heat Pump Installation Cost Oklahoma 2026
Recent Installations
A sample of recent residential HVAC replacements across central Oklahoma. Every system sized by load calculation, every installation backed by a 6-month satisfaction guarantee.
Trane XV premium heat pump — brick house, Kingfisher area
Trane package unit — residential install, central Oklahoma
RunTru by Trane — stone-exterior home, central Oklahoma
Trane air handler installed — utility closet, Kingfisher OK
System commissioned and refrigerant charged — stone house
Hartzell’s crew during residential installation — central Oklahoma
Trane’s 100% Performance Guarantee
As an authorized Trane Comfort Specialist™ dealer, Hartzell’s carries the 100% Performance Guarantee on every Trane system we install. If your new system fails to perform to factory specifications in the first year — or experiences a compressor, heat exchanger, or major leak failure in the first 60 days — Trane will replace the equipment. It’s a guarantee only Comfort Specialist dealers can offer.
Our Job Isn’t Done Until
- ✓Your system is running properly and fully tested before we pack up
- ✓Every question you have is answered — we don’t leave you guessing
- ✓Your home is left clean — we clean up after ourselves, every time
- ✓You understand your warranty and exactly what it covers
That’s the standard Dave Hartzell has kept for 45 years. Every technician. Every call.
Repair vs. Replace: How to Decide
Not every failing system needs to be replaced — and not every repair is worth making. Here’s the honest comparison Hartzell’s uses with every customer facing this decision:
Use the $5,000 rule: multiply repair cost by system age. Above $5,000 — replacement usually wins.
Run the Numbers: Repair or Replace Calculator
Enter your system details below. The calculator scores the same three criteria I check on every service call and gives you a live recommendation — no pressure, just math.
Enter system age and repair cost to see your recommendation.
Results update live as you fill in each field.
Dustin — Brazing in a New RunTru AC System
Related Reading
Every call starts with honesty. The $111 diagnostic is credited toward any repair or replacement if you accept an estimate within 14 days. Dave Hartzell has 45 years of HVAC experience — he’ll tell you exactly what your system needs, not the most expensive option.
Not sure what’s wrong? Chat with us using the button in the corner — describe what your system is doing and we’ll point you in the right direction.
New System Pricing — Installed & Ready to Run
I’ve been installing HVAC systems in central Oklahoma for 15+ years. Here’s what I tell every customer: the right system depends on where you are in life — not just your budget. If you’re flipping this house or only plan to stay 2–5 years, go with one of the bottom two tiers. Get a solid, reliable system and move on. But if you’re going to die in that house or hand it down to your kids someday — go with the XV18. The energy savings are real. The comfort is real. You’ll feel it every single day.
A rebuild makes sense if your system is under 10 years old and the repair cost is less than half the replacement cost. Use our free Repair-vs-Replace Calculator to find out.
HVAC Rebuild — A Third Option
Not every system needs full replacement. If your equipment is under 10 years old, sometimes rebuilding makes more sense — replacing the compressor, coil, or major components at a fraction of full replacement cost. I’ll tell you honestly which path makes sense for your system.
Which system is right for you?
🕐 Selling or moving in 2–5 years?
Start with Tier 1 or 2. Reliable, warranty-backed, honest value.
🏠 Staying forever or gifting to family?
Go Tier 5. Real savings, real comfort, 12-year warranty.
“Quality goes in before the sticker goes on.” — Dave Hartzell
ACiQ 14 SEER2
$8,755 installed
Starting at $146/mo with approved credit
Built by ICP (same factory as Carrier equipment), single-stage scroll compressor, 80% single-stage gas furnace, silicon nitride igniter, standard programmable thermostat included, 10-year parts warranty.
Who it’s for: Budget-conscious buyers, short-term homeowners, rentals.
RunTru by Trane 14 SEER2
$9,860 installed
Starting at $164/mo with approved credit
Trane-engineered value line, single-stage scroll compressor, Spine Fin aluminum coil (same as full Trane systems), 80% single-stage gas furnace, R-454B eco-friendly refrigerant, Trane thermostat included, 10-year parts / 20-year heat exchanger warranty.
Who it’s for: Value buyers who want Trane quality without the Trane price tag.
Trane XR14 + S8BA
MOST POPULAR
$12,610 installed
Starting at $210/mo with approved credit
Trane Climatuff compressor, Spine Fin coil, DuraTuff rust-proof base pan, Weatherguard fasteners, 80% single-stage S8BA gas furnace, silicon nitride igniter, Trane reporting thermostat included, 12-year parts warranty (Trane TCS SELECT dealer).
Who it’s for: Homeowners who want proven Trane reliability and the full 12-year warranty advantage.
Trane XR15 + 2-Stage Furnace
BEST VALUE
$14,780 installed
Starting at $246/mo with approved credit
16 SEER2 efficiency, Trane Climatuff compressor, 80% 2-stage gas furnace runs at 60% on mild days for better humidity control, 9-speed ECM blower motor, Trane reporting thermostat included, 12-year parts warranty (Trane TCS SELECT dealer).
Who it’s for: Homeowners who want real comfort improvement and better humidity control year-round.
Trane XV18 + S8X2
$18,167 installed
Starting at $303/mo with approved credit
18 SEER2 variable-speed with 750 operating stages, virtually no on/off cycling, 80% 2-stage S8X2 gas furnace, 9-speed ECM blower, ENERGY STAR certified, full communicating system where thermostat, AC, and furnace talk to each other and report performance in real time, Trane reporting thermostat included, 12-year parts warranty (Trane TCS SELECT dealer).
Who it’s for: Forever-home owners and families passing the home down. If this is your forever home, this is what I’d put in mine.
Trane TCS SELECT Dealer Advantage
Tiers 3–5 come with a 12-year parts warranty. Two more years than the standard 10-year coverage you’ll get from a non-certified dealer.
Maintenance Plan Members Save 5–10% on New System Installs
Already on a Hartzell’s maintenance plan? Your loyalty discount applies automatically. Not a member yet? Join starting at $138/year and save hundreds on your next system. Learn about maintenance plans ›
Finance Your New System — 0% for 60 Months
We offer financing on new system installations, repairs, and rebuilds. Qualified buyers can get 0% interest for up to 60 months through our financing partners — Synchrony, Wells Fargo, and Wisetack. Call 405-375-4822 to ask about current offers.
0% APR for 60 months with approved credit through Synchrony, Wells Fargo, or Wisetack. Minimum monthly payments required. Subject to credit approval. See lender for full terms.
Hartzell’s 1-Year Everything Warranty
Every system we install comes with our 1-year parts and labor warranty — covering everything. If anything goes wrong in the first year, we come back. No charge. No argument.
Trane System Purchase Includes 1 Year of Dave’s 360 Maintenance Plan
Every Trane system install (Tiers 3–5) comes with a full year of Dave’s 360 — our top-tier maintenance plan ($360 value). Two tune-ups, priority scheduling, 15% parts discount, and dispatch fee waived on covered visits. It’s our way of starting the relationship right.
All prices are starting at for a standard single-zone replacement on existing ductwork. Prices vary by home size, system tonnage, and installation complexity. Call 405-375-4822 or book online for a free estimate on your specific home.
What Customers Are Saying
★★★★★
“Dave came out same day and had our AC running in under an hour. Honest pricing, no upsell.”
— William G., Kingfisher, OK
★★★★★
“They were great to work with. Tim was very knowledgeable installing a mini-split at my barber shop.”
— Kevin K., Kingfisher, OK
★★★★★
“I’ve been using Hartzell’s for 10+ years and received great service consistently.”
— Katie B., Kingfisher, OK
4.8 stars · 271 reviews on Google
Ready for a New HVAC System?
Free estimates on all system replacements. Manual J load calculation, proper sizing, full OEM installation. NATE-certified, 4.8 stars/271 reviews.
Nearby Communities We Serve
✓ $111 diagnostic fee — credited toward your repair if you accept an estimate within 14 days.
Meet the Owner
Dave Hartzell has 45 years of HVAC experience and opened Hartzell’s about 15 years ago. That background is why every replacement job starts with a Manual J load calculation — not a rule of thumb. Trane Comfort Specialist, Mitsubishi Diamond Dealer, NATE-certified, IGSHPA-accredited. Same-day estimates, upfront pricing, and a 6-month satisfaction guarantee on every new system.
Call 405-375-4822 or book online to schedule your free estimate.
Ready for a Free Estimate?
Most estimates delivered same day. No obligation. Financing available.
Content reviewed by Dave Hartzell — Oklahoma Master HVAC License #00115936, IGSHPA Accredited Geothermal Installer, Mitsubishi Diamond Dealer, Trane Comfort Specialist TCS SELECT. Hartzell’s Heat & Air, Kingfisher OK, for 15+ years.