Ethan Clark Air Conditioning

In Texas, HVAC contractors and technicians typically register or hold licenses through the Texas Department of Licensing and Regulation (TDLR). Ask the contractor for their TDLR license or registration number and verify it on the TDLR website. Also request proof of general liability insurance (and workers’ compensation if employees will be on site) and a current certificate of insurance. Check references, online reviews, and third‑party credentials (for example, NATE certification for technicians) and confirm who will pull permits and handle inspections for work in Houston.

Yes — most major HVAC work in Houston (new equipment installations, system replacements, major ductwork changes, and some refrigerant work) requires a mechanical permit and inspections from the city. Permits ensure the work complies with local building and mechanical codes and is inspected for safety. Licensed contractors commonly pull permits on the homeowner’s behalf, but you should confirm in writing who will obtain and pay for the permit and when inspections will occur.

Contractors should base equipment selection on a detailed load calculation (commonly a Manual J) that accounts for your home’s square footage, orientation, insulation, windows, occupancy and local climate. In humid, hot climates like Houston’s, proper sizing matters because oversized systems short‑cycle, reduce dehumidification, increase wear, and raise operating costs, while undersized systems run constantly and may not meet comfort needs. A good contractor will provide the load calculation, recommend appropriate equipment and efficiency options (SEER/HSPF or heat‑pump ratings), and evaluate ductwork and airflow (Manual D/air‑balancing) so the system performs efficiently and controls humidity.