The most important factor in choosing a heating and air conditioning contractor is trust. Greiner Heating and Air Conditioning carries the highest training and qualifications in the industry. We're happy to bring this level of service to homes in our region!

Greiner Heating & Air Conditioning, Inc. BBB Business Review
Better Business Bureau

For over one hundred years, BBB is the preeminent resource to turn to for objective, unbiased information on businesses and charities. Their free Business Reviews and BBB Wise Giving Charity Reports help people make the right purchasing or donation decision. Greiner Heating and Air Conditioning is a BBB-accredited company.

Home Energy Renovation Opportunity

HERO Registered Contractors are licensed, and adhere to rigid consumer protection policies. Greiner Heating and Air Conditioning is a HERO registered contractor, which means we can offer the full range of homeowner financing options the program offers.

California First

All CaliforniaFIRST trusted contractors are screened to ensure they meet program standards and receive training to answer questions about CaliforniaFIRST financing. As part of this program, Greiner Heating and Air Conditioning will meet with you to review a comprehensive list of eligible projects and products to help you select the solutions that are best for your home and your budget.

Home Upgrade California (EUC)

Contractors in the Home Upgrade California database have all been licensed by the state of California through the Contractors State License Board (CSLB). Energy Upgrade California® is a state initiative to help Californians take action to save energy and conserve natural resources, help reduce demand on the electricity grid, and make informed energy management choices at home and at work.

North American Technician Excellence

Founded in 1997, North American Technician Excellence (NATE) is the nation's largest non-profit certification organization for heating, ventilation, air conditioning and refrigeration technicians. NATE certification tests represent real world working knowledge of HVACR systems. Developed by a committee of industry experts nationwide, our NATE exams represent HVACR topics pertinent to contractors, educators, manufacturers and utilities alike.

BPI GoldStar Contractor

All BPI GoldStar Contractors commit to employing BPI certified professionals and doing work according to BPI Standards. BPI certified professionals have passed BPI's rigorous written and in-field practical exams that verify their knowledge and skills in building science solutions. They know how to improve energy efficiency while providing important safety functions such as mold prevention, carbon monoxide testing, and combustion appliance safety checks. They also have the know-how to help prepare your home for solar, geothermal, or other types of energy upgrades.

National Comfort Institute

NCI certified professionals, using the methods and training that Performance-Based Contracting provides, help you solve a wide variety of comfort and safety issues in your home, with a focus upon measureable results and utmost professionalism.

Air Conditioning Contractors of America

It's true: some contractors are better than others. Builders and homeowners need to be sure that the indoor environment contractors they hire are doing the right thing, the right way. That's where ACCA's QA accreditation program comes in. The QA program is designed from the ground up to focus on real American National Standards Institute benchmarks.

Bay Area Regional Energy Network

Home Upgrade is an Energy Upgrade California® program specifically for Bay Area homeowners and implemented by the Bay Area Regional Energy Network (Bay-Ren). Bay-Ren Home Upgrade is available to homeowners in the following cities in the Greiner service area: Vacaville, Fairfield, Suisun City. Talk to us about the special incentives available!

Qualified and trustworthy.

That's the Greiner team.

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Up to $1,700 in Savings and Financing!
For service, replacement, solar and home-performance energy upgrade projects