C-20 Warm Air Heating Ventilating and Air Conditioning

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Rows of industrial air conditioning units with large fans and metal pipes, installed side by side on a rooftop—expertly serviced by Val's Plumbing & Heating to ensure efficient cooling in any industrial area.

Why Hire a C-20 Licensed Contractor

When it comes to your home or business comfort systems, hiring a C-20 Warm-Air Heating, Ventilating, and Air Conditioning Contractor means you’re choosing a state-licensed HVAC professional who’s trained, tested, and legally qualified to install, maintain, and repair your heating and cooling equipment.

In California, the C-20 license—issued by the Contractors State License Board (CSLB)—is required for anyone who designs or installs complete HVAC systems, ductwork, and ventilation equipment. Working with a licensed expert ensures your system operates efficiently, safely, and in compliance with all mechanical and energy codes.

Val’s Plumbing & Heating, Inc holds a valid C-20 Classification on our California State Contractors License.

Our California State Contractors License number is: 236164

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What Does a C-20 Contractor Do?

California Code of Regulations
Title 16, Division 8, Article 3. Classifications

A warm-air heating, ventilating and air-conditioning contractor fabricates, installs, maintains, services and repairs warm-air heating systems and water heating heat pumps, complete with warm-air appliances; ventilating systems complete with blowers and plenum chambers; air-conditioning systems complete with air-conditioning unit; and the ducts, registers, flues, humidity and thermostatic controls and air filters in connection with any of these systems. This classification shall include warm-air heating, ventilating and air-conditioning systems which utilize solar energy.

Authority cited: Sections 7008 and 7059, Reference: Sections 7058 and 7059 (Business and Professions Code)

Scope of Work Under C-20 License

  • 🏗️ Code-Compliant Installation & Repairs
    C-20 contractors meet strict CSLB training and testing requirements. They know California’s building, mechanical, and energy codes, ensuring that every installation or retrofit passes inspection and performs safely.

  • ⚙️ Full-Scope HVAC Expertise
    From furnaces, air conditioners, and heat pumps to ductwork, thermostats, and air filtration systems, licensed C-20 professionals can design and service every component of a modern HVAC system.

  • 💡 Energy Efficiency & Performance
    A properly licensed HVAC contractor understands system sizing, airflow balance, and equipment selection — helping you save energy, lower utility costs, and improve indoor comfort year-round.

  • 🧰 Quality Workmanship & Reliability
    Licensed contractors are accountable to the CSLB, bonded, and insured. Their work is monitored for safety, quality, and adherence to state standards — something unlicensed technicians can’t guarantee.

  • 🛡️ Safety & Legal Protection
    Working with a licensed HVAC company protects you as a consumer. You gain legal recourse, insurance coverage, and assurance that all workers are qualified and permitted to handle refrigerants and high-voltage systems safely.

  • 🌎 Trusted by Inspectors & Building Owners
    Inspectors, property managers, and insurance companies recognize and prefer licensed contractors. Their work ensures compliance and long-term performance of your HVAC systems.

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