Trane Comfort Specialist, Hartzell’s Heat & Air
Dave Hartzell has been a Trane dealer in central Oklahoma since the early 1990s, first at another shop in the area, then through Hartzell’s Heat & Air for the past 15+ years. The Trane Comfort Specialist designation reflects what he was already doing, Manual J load calculations before every installation, correct refrigerant charge verification, and same-day warranty registration. The Comfort Specialist standard has real teeth: Trane monitors customer satisfaction scores and dealers who don’t maintain compliance lose the designation. Dave holds Mitsubishi Diamond Dealer and IGSHPA geothermal credentials by the same standard, you earn it by doing installations correctly, you keep it the same way. When Hartzell’s installs your Trane system, the paperwork is handled and your warranty is active from the day we leave.
Don’t wait until it’s an emergency. Same-day and next-day slots fill fast during peak season. Call 405-375-4822 to check availability, or use the chat button in the corner.
✓ Trane Comfort Specialist
✓ Master HVAC License
✓ Kingfisher for 15+ years
Trane Comfort Specialist · NATE-Certified · Master HVAC License · IGSHPA Geothermal · 405-375-4822
Trane Comfort Specialist since the 1990s, free in-home estimate
What the Trane Comfort Specialist Designation Means
Trane awards the Comfort Specialist designation only to dealers who meet and maintain these requirements:
- Technical trainingTechnicians must complete ongoing Trane factory training on current equipment and installation standards
- Proper installation practicesSystems must be installed to Trane’s specifications, including correct sizing, refrigerant charge, and airflow
- Customer satisfaction standardsTrane monitors customer feedback; dealers who don’t maintain satisfaction scores lose the designation
- Continuing educationRequirements are ongoing, not a one-time certification
For you, it means your Trane equipment is installed correctly and warranted properly. An improperly installed system can void manufacturer warranties, that doesn’t happen when a Comfort Specialist does the work.
Our Full Credentials
Trane Comfort Specialist
Factory-trained and certified on Trane and RunTru equipment. Authorized to install and honor Trane manufacturer warranties.
NATE-Certified Technicians
NATE (North American Technician Excellence) is the HVAC industry’s most recognized certification. Our technicians have passed rigorous exams on installation and service.
Master HVAC License
Dave Hartzell holds an Oklahoma Master HVAC License, the highest license classification in the state. Most HVAC companies are operated by journeyman-level technicians.
Mitsubishi Diamond Dealer
Mitsubishi’s highest dealer tier for ductless mini-split systems. Factory-trained on Mitsubishi equipment installation and service.
IGSHPA-Accredited Geothermal
Dave is accredited by the International Ground Source Heat Pump Association, one of a small number of truly qualified geothermal installers in Oklahoma.
45 Years HVAC Experience
Locally owned in Kingfisher for 15+ years. A trusted name in central Oklahoma HVAC, not a franchise.
Trane Systems We Install & Service
We install and service the full Trane residential and light commercial lineup:
- Trane Air Conditioners, From the XR series to the variable-speed XV series; up to 22 SEER2
- Trane Gas FurnacesSingle-stage, two-stage, and variable-speed modulating furnaces; up to 97.3% AFUE
- Trane Heat PumpsXR, XL, and XV series heat pumps with heating and cooling in one system
- Trane Packaged UnitsAll-in-one rooftop units for homes without basements or interior space for equipment
- Trane Air Handlers & CoilsProperly matched indoor components for heat pump and AC systems
- Trane Indoor Air QualityCleanEffects air filtration, whole-home humidifiers, UV systems
- RunTru by TraneTrane’s value-tier brand offering reliable performance at a lower price point
Why It Matters Who Installs Your Trane System
Trane builds excellent equipment. But even the best equipment performs poorly when it’s incorrectly sized, improperly charged with refrigerant, or installed with poor airflow. These are the most common causes of HVAC problems, and they’re all installation issues, not equipment issues.
As a Comfort Specialist, we’re required to perform Manual J load calculations to right-size equipment and verify correct refrigerant charge and airflow on every installation. This protects your equipment warranty and ensures you get the efficiency ratings you paid for.
Trane Warranty Information
Trane residential equipment includes a base warranty, with extended warranty options available. To qualify for the full extended warranty, equipment must be:
- Registered within 60 days of installation
- Installed by a licensed HVAC contractor
- Installed to Trane’s specifications
We handle warranty registration as part of every installation so your coverage is active from day one.
Trane Service & Maintenance
Annual maintenance keeps your Trane system running at peak efficiency and catches small problems before they become expensive ones. Our HVAC maintenance plans are available for Trane and all other equipment brands.
Serving Central Oklahoma
We provide Trane installation and service throughout central Oklahoma including Kingfisher, Enid, Guthrie, Edmond, Yukon, Mustang, El Reno, Watonga, Fairview, and surrounding communities within a 60-mile radius of Kingfisher.
Common Questions About Trane Systems
What is a Trane Comfort Specialist?
A Trane Comfort Specialist is a dealer who has met verified standards for technical training, correct installation practices, and customer satisfaction, requirements Trane monitors and enforces on an ongoing basis, not a one-time credential.
A Trane Comfort Specialist is a dealer who has met Trane’s strict requirements for technical training, installation quality, and customer satisfaction. It ensures your Trane system is installed correctly and your warranty is protected. Hartzell’s has held the designation since the 1990s by consistently meeting these standards.
Does it matter who installs my Trane system?
Yes, even excellent equipment performs poorly when incorrectly sized, improperly charged, or installed with poor airflow. A Trane Comfort Specialist is required to perform Manual J load calculations and verify installation to Trane’s specifications on every job.
Even great equipment performs poorly when incorrectly sized, improperly charged, or installed with poor airflow, these are installation problems, not equipment problems. A Trane Comfort Specialist is required to size equipment correctly and verify installation to Trane’s standards. Incorrect installation can also void manufacturer warranties.
How do I get the full Trane warranty?
Register within 60 days of installation, and have the system installed by a licensed contractor to Trane’s specifications, Hartzell’s handles warranty registration same day as part of every installation.
Equipment must be registered within 60 days of installation and installed by a licensed contractor to Trane’s specifications. We handle warranty registration as part of every installation so your coverage is active from day one.
Considering a system upgrade? If your equipment is aging or repair costs are adding up, see our HVAC System Replacement page for honest guidance on when replacement makes sense, and what to expect from the process.
Manual J sizing and day-one warranty registration included.
Recent Trane Installations
Trane XV high-efficiency heat pump, residential install
Trane package unit, central Oklahoma residential
Trane condenser commissioned and charged
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.
Meet the Owner
Hartzell’s has been a Trane dealer since the 1990s and achieved Comfort Specialist status for consistent installation quality. TCS SELECT means factory-direct pricing, factory warranty registration, and a 12-year parts warranty on every qualifying Trane system.
Call 405-375-4822 or book online to get started.
Nearby Communities We Serve
Trane Unstoppable Savings Event, March 2026
Instant manufacturer rebates up to $900 on qualifying Trane XR and XV systems installed this month. Stack with Oklahoma utility rebates for maximum savings. Call 405-375-4822 to lock in your quote before the event ends.
Ready to Install or Service a Trane System?
Talk to a Trane Comfort Specialist. Honest recommendations, no pressure.
✓ $111 diagnostic fee, credited toward your repair if you accept an estimate within 14 days.
Content reviewed by Dave HartzellOklahoma 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.
Our Job Isn’t Done Until You’re Satisfied
- Your system is running, tested, and set to your preferred temperature
- You understand how to operate your new equipment or thermostat
- The work area is clean, we take our trash with us
- You have documentation for manufacturer warranty and any applicable rebates
- Every question you have is answered before we leave the driveway