Texas climate & load drivers
- IECC climate zone: 2A-3A-3B-4B
- Annual load split: Cooling-dominant — annual cooling load exceeds heating load (1,900 HDD / 2,900 CDD)
- Dominant heating fuel: Natural gas — piped utility supply through state pipeline network
- Dominant cooling system: Central air conditioning paired with separate heating equipment
Texas licensing & permits
- License status: Statewide license required
- License board: Texas Department of Licensing & Regulation (TDLR) — Air Conditioning & Refrigeration Contractor (Class A unlimited / Class B ≤25 ton) (official site)
- Permit: city mechanical permit required
How HVAC replacement costs vary in Texas
State-specific code or insurance rule: Texas TDLR Class A and Class B Air Conditioning & Refrigeration licenses are mandated under Texas Occupations Code Chapter 1302 with strict scope limits — Class B caps at 25-ton single-system tonnage and 1.5 million BTU heating, prohibiting commercial work — and post-Winter-Storm-Uri (2021), TDLR added a new Endorsement A pathway recognizing emergency dual-fuel design experience.
Cities in Texas
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