Our Work Map: 3,321 Real HVAC Jobs Across Central OK
I mapped 3,321 real Hartzell’s jobs and 1,894 customer locations across Central Oklahoma. Filter by ZIP, see photos and reviews. Call 405-375-4822.
HVAC News
HVAC News
5 Signs Your Oklahoma AC Is About to Die Memorial Day
Memorial Day weekend pushes Oklahoma ACs into their first 90 degree stretch, and weak systems fail in the first 72 hours. Here are the 5 signs I watch for every spring after 45 years of HVAC work in Kingfisher.
Uncategorized
Allergy Season in Central Oklahoma: What 45 Years Taught Me About Your Air Handler and Indoor Air Quality
Why Oklahoma allergies hit so hard in May, and what 45 years of HVAC work taught me about MERV filters, UV lights, duct sealing, and your air handler.
Uncategorized
Why Your AC Worked Last Week But Won’t Cool Today: First-Hot-Day Failure Guide for Central Oklahoma (May 2026)
AC not cooling Oklahoma on the first hot day? Master HVAC tech in Kingfisher explains 8 common May failures. 4.8 stars/279 reviews. Call 405-375-4822.
Uncategorized
AC Tune-Up in Kingfisher Oklahoma: My PMA Plan
What a real $229 AC tune-up in Kingfisher Oklahoma includes: 12-point check from a Master HVAC tech with 45 years on the truck. Book before the 90s hit.
I’m in Marquis Who’s Who. Here’s What That Means.
Marquis Who’s Who picked me for their 2026 edition. After 45 years in HVAC and 15+ years running my own shop in Kingfisher, here’s what it actually changes for the people I work for. Spoiler: not much, and that’s the point.
Geothermal, HVAC News
What Oklahoma Homeowners Actually Expect From Geothermal (And Where Reality Bites Back)
Master HVAC Dave Hartzell breaks down the April 2025 ACHR geothermal survey for Kingfisher Oklahoma homeowners. Cost, rebates, lifespan, install. Call 405-375-4822.
HVAC News
Window AC Not Cooling? What to Check First
When a window AC system stops cooling right, most people assume it requires refrigerant. In my experience, that is rarely
HVAC News
Heat Pump Airflow Problems in Oklahoma
Last week I got called out to look at a Lennox heat pump that was running constantly but not keeping
HVAC News
High-Efficiency Heat Pump vs Standard: Worth It?
Every spring I get calls from homeowners who are about to replace their heat pump and want to know: is