Bestopedia Rankings

Best HVAC Contractors in Hacienda Heights, California

Ranked by the Bestopedia Trust Score, drawn from verified CSLB license, bond, and workers’-comp records. Rankings are earned — never for sale.

Last updated July 5, 2026

Our Top Pick

Energy Control

Trust Score 100/100 — CLEAR license standing, bonded, workers’ comp current.

VERIFIED

  1. Energy Control

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  2. C F Air Conditioning & Heating Service LLC

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  3. HVAC Refrigeration and Electrical

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    100 / 100 Trust Score

  4. Green Power Air Controls Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    99 / 100 Trust Score

  5. Yellow Sea Construction Inc

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    99 / 100 Trust Score

  6. Ab Advanced Air Conditioning Company

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    95 / 100 Trust Score

  7. Dr Dio Heating & Air Conditioning

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    93 / 100 Trust Score

  8. Thermsol

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    89 / 100 Trust Score

  9. John's Mechanical Services

    CLEAR license standing, bonded, workers’ comp not current.

    LISTED
    88 / 100 Trust Score

  10. Wu Jianzhi

    CLEAR license standing, bonded, workers’ comp current.

    VERIFIED
    88 / 100 Trust Score

noun /best-oh-PEE-dee-uh/

a curated ranking of the best in any category, based on independent review.