About Us
Green Air Heating and Air Conditioning, Inc. has been in business since 2007 but draws on over a century of combined experience from our staff. We understand that you have unique needs so you can expect that we’ll provide you with products and services specifically designed to take care of your requirements. No one-size-fits-all solutions here!
About the Owner and Founder Nicholas Donzelli
Founder & Visionary of Green Air Heating & Air Conditioning, Inc.
Visionary in Energy Independence & Sustainable Solutions
Nicholas Donzelli is the Chairman and 100% owner of Green Air Heating and Air Conditioning, Inc. (Green Air), a company he founded in 2007 to revolutionize energy efficiency, sustainability, and grid-independent solutions. With nearly two decades of experience in designing and implementing high-performance HVAC, solar, battery storage, and microgrid solutions, Nicholas has positioned Green Air as a leader in energy independence, decarbonization, and sustainable infrastructure.
Under his leadership, Green Air has expanded beyond traditional HVAC services to become a Tesla-certified installer, CertainTeed SELECT ShingleMaster™, and a pioneer in energy-efficient building systems. His company specializes in commercial, industrial, agricultural, and residential energy solutions, providing clients with long-term financial and energy security by reducing dependence on utility companies and bureaucratic energy monopolies.
Engineering Mindset & Problem-Solving Excellence
Nicholas’ journey into sustainable energy solutions began in the United States Navy, where he attended the Nuclear Power Training Command and Nuclear Prototype training. He later continued his studies in Systems Engineering and Nuclear Engineering at the United States Naval Academy until his military departure.Nicholas is deeply passionate about mathematics, physics, spatial recognition, and understanding how things work. His ability to analyze complex systems allows him to identify inefficiencies, optimize processes, and develop high-performance solutions that drive real-world results. His approach is rooted in practical problem-solving, focusing on data-driven decision-making and tangible improvements in efficiency, cost savings, and sustainability.
Notable Achievements & Industry Impact
- Secured a $4.5 million grant from the California Energy Commission’s Food Process Incentive Program for Joseph Gallo Farms, enabling a major sustainability upgrade that reduced sewage, waste, and energy costs while improving cooling efficiency in dairy processing.
- Developed commercial microgrid systems, integrating solar, battery storage, and advanced energy management for businesses and large-scale facilities.
- Designed and implemented HVAC and renewable energy solutions for a wide range of commercial, industrial, and residential projects, ensuring long-term cost savings and reduced environmental impact.
- Advised and collaborated with industry leaders, including manufacturers, financiers, and state agencies, to drive the adoption of low-carbon, high-efficiency energy technologies.
- Spearheaded grid-independent energy solutions, offering businesses and homeowners a path to full electrification, decarbonization, and energy autonomy without reliance on government incentives.
Green Air: Leading the Energy Transition
Under Nicholas’ leadership, Green Air is redefining energy independence by offering tailored solutions that allow clients to control their energy costs, mitigate the impact of hyperinflation, utility rate hikes, and supply chain vulnerabilities. His approach is relationship-driven, prioritizing education and transparency to help clients make smart, strategic investments in sustainable infrastructure.
Green Air’s offerings include:
- Comprehensive HVAC design and implementation
- Solar and battery storage systems (Tesla, Sol-Ark, Savant, Renon, and more)
- Microgrid and backup power solutions for commercial and residential applications
- Energy-efficient building upgrades, including high-performance roofing and insulation
- Custom-tailored financing solutions for energy independence, including long-term service agreements and no-money-down options
Nicholas' ability to see the bigger picture, anticipate industry shifts, and design solutions that maximize efficiency and financial returns sets him apart as a leader in the energy sector. His relentless focus on eliminating inefficiencies, optimizing performance, and achieving tangible results is the driving force behind his success.
About Us
As your energy solutions company, Green Air Heating and Air Conditioning, Inc. aims to provide you with durable, high-efficiency systems, helping you reduce your energy costs. Want to go further and reduce your dependence on the grid? We can also aid you by implementing systems that will allow you to generate your own heat and electricity, tapping into solar power or other forms of renewable energy.
As part of installing, maintaining, and repairing residential and commercial HVAC systems, we cover concerns related to heating, air conditioning, radiant, ductwork, and air quality. Heating and cooling greatly affect indoor comfort levels but what many don’t realize is how crucial air quality is as well. Considering how much time you spend indoors, you also have to be mindful of the air you breathe, ensuring it is free from airborne pollutants, such as bacteria, dust, and mites. Green Air Heating and Air Conditioning, Inc. can help you with that.
Aside from offering top-notch HVAC solutions, Green Air Heating and Air Conditioning, Inc. also provides customized solar panel designs with award-winning installation services and is a Certainteed-certified Master Elite Contractor and Green Roofer.
Expert Solutions. No Compromises.
Contact Us Today!
To learn more about what we can do for you, just give Green Air Heating and Air Conditioning, Inc. a call at (925) 255-1022. We also have an online contact form you can use to get in touch with us. Green Air Heating and Air Conditioning, Inc. primarily serves the Greater Bay Area, offering HVAC, solar, and roofing solutions to customers in Concord, CA, and the surrounding communities.
Why Choose Us
Local Expertise: We understand the specific HVAC challenges homeowners face in San Francisco and surrounding areas.
Energy Efficiency: We focus on eco-friendly, energy-saving solutions to reduce your carbon footprint and lower utility bills.
Customer-First Approach: Our goal is to provide personalized service, ensuring your complete satisfaction at every step.
Get in touch with Green Air Heating and Air Conditioning, Inc. today to learn more about how our HVAC services can transform your home into a more comfortable and energy-efficient space. Call us at (925) 255-1022 to schedule your free system estimate!
Customer Testimonials
Our clients love the energy solutions we provide!
Nick is very well educated on the products industry. He has been in the industry for years now and knows more than anyone else I have spoken to. Its very refreshing to have the owner of the company come out to talk to you about your options compared to a door to door sales guy who cant even answer the most basic questions. Im very happy with the service and attention to detail.
Mike N.
These guys actually know what they are doing and do what they say they are going to do. They are capable in many areas including installing solar panels, Tesla batteries and also HVAC. They complete the whole job with their own employees rather than using outside contractors. We were really pleased with the results on three separate jobs. Thanks.
Jon K
Nick and Green Air installed our Solar One year ago, it has exceeded its projected output and works great! The work was started and completed on time and Green Air completed all the extra work such as getting permits from the city of Benicia. Green Air employees cleaned up their work site daily and they were a pleasure to work with. I love the fact that we have shrunk our carbon footprint.
Tobi m.
Our solar was installed on our house earlier this year. I found Nick and Green Air to be extremely professional, responsive to questions and started and completed the job on time. Nick has a very strong work ethic and was competitive in his pricing as compared to other companies. It’s also nice to know that PG & E is now my customer!
Michael M.
Trusted by top companies worldwide for HVAC solutions
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