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.
AC not cooling Oklahoma on the first hot day? Master HVAC tech in Kingfisher explains 8 common May failures. 4.8 stars/276 reviews. Call 405-375-4822.
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.
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.
Master HVAC Dave Hartzell breaks down the April 2025 ACHR geothermal survey for Kingfisher Oklahoma homeowners. Cost, rebates, lifespan, install. Call 405-375-4822.
When a window AC unit stops cooling right, most people assume it needs refrigerant. In my experience, that is rarely
Last week I got called out to look at a Lennox heat pump that was running constantly but not keeping
Every spring I get calls from homeowners who are about to replace their heat pump and want to know: is
Questions? Call 405-375-4822, Hartzell’s Heat & Air, Kingfisher OK.
Sizing an HVAC system is the most important decision in any replacement, and the one most contractors get wrong. Here’s