Green Air Heating and Air Conditioning

★★★★★ 4.5 / 5 (88)
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: 3953 Industrial Way, Concord, CA 94520
: (925) 284-7336
: https://www.gogreenair.net

Company Overview

Green Air Heating and Air Conditioning, Inc. in Concord, CA, delivers expert HVAC services, featuring AC installation, AC repair, furnace repair, and air conditioning repair. We specialize in ductless mini splits, indoor air quality solutions, and heater repair. As a reliable HVAC and electrical company, we deliver EV charger installation, whole-home generators, electrical upgrades, SPAN panels, and Tesla Powerwall installation. Our team promotes energy efficiency with solar panel installation, electrification services, and microgrid planning to build self-sufficient homes powered by clean energy.

Since 2007, we have been electrifying and decarbonizing homes and businesses. Our vision for low carbon footprints has allowed us to stay ahead of title-24, CARB regulations, and utilize low GWP refrigerants like CO2. For the past 17 years, our goal has been reducing CO2 impact on our planet by partnering with conscientious clients. We all have a part in climate change; we aim to collaborate with those who share our vision for a lower carbon impact. This can only happen when we agree on our responsibility to ensure a sustainable future for humanity. Green Air offers solutions to help us all play our role in restoring our relationship with Mother Earth.

From roofing to solar to HVAC, Green Air is the premier Energy Solutions Company.

A proud recipient of the 2016 Top 500 US Solar Contractor award from Solar Power World Magazine. Nicholas Donzelli, an expert in the field, has been installing HVAC, solar, and radiant systems. Allow him and his team of experienced professionals to work with you to develop a unique solution that fits your home and budget.

Business Services

  • HVAC installation or replacement
  • HVAC system repair
  • HVAC system maintenance
  • Add to existing system
  • Add solar panels
  • Solar panel cleaning
  • Solar system installation
  • Solar rooftop panel installation
  • Solar shingle installation
  • Solar system maintenance

Business Location & Hours



Mon:8:00 AM - 4:00 PM
Tue:8:00 AM - 4:00 PM
Wed:8:00 AM - 4:00 PM
Thu:8:00 AM - 4:00 PM
Fri:8:00 AM - 4:00 PM
Sat:Closed
Sun:Closed

Recommended Customer Reviews

K G.
★★★★★

We bought a new house and have been remodeling for the past year. We've worked with several contractors during the project and continue to be impressed by Nick and the Green Air team.
Here are a few reasons we had a great experience with Green Air:

1. Nick is a hands-on owner and operator. He scoped and bid on the work himself and would visit the job site often to ensure everything was going as planned. If there was ever a question or issue, Nick would come himself to answer it.

2. Honesty, Integrity, & Quality: Nick is honest and keeps his promises. At one point during the job Nick noticed a line-set was just slightly off in size. I would have never noticed this and it probably wouldn't have had much impact on our system. However Nick saw it, pointed it out, and insisted on having his team come out to replace the line-set without charge.

3. Takes ownership of issues: At one point during the job, we received some bad equipment from the manufacturer (not Nick's fault). Nick noticed the equipment wasn't working right and insisted on replacing it. However the manufacturer said they wouldn't give Nick a refund on the equipment until he returned the original unit to them for testing and evaluation. Nick could have easily passed that problem along to me, leaving me without a system for a few weeks while the manufacturer evaluated it and made a decision on replacement. However Nick didn't want us to be uncomfortable. He used his own funds to purchase a new system for me, and then waited months for the manufacturer to test the faulty system and provide a refund to Green Air. Nick never charged me for that - he just did it.

4. Leading technology: I like to stay up to date on emerging technologies. Nick is the same way. Every other vendor who bid on my job recommended the same old system I've been seen in homes for the past few decades. Nick and Green Air were the only ones who recommended a newer technology that has recently hit the U.S. market. The system they installed for us is much quieter, more efficient, and configurable than anything I've seen in other homes. Nick stays up to date on new technologies so he can offer the newest and most forward thinking solutions to his customers. The same was true of his solar offerings.

5. Cross-platform solutions. Not only does Green Air do HVAC, they also offer solar. They did a great job installing in our solar, which now powers most of our HVAC needs as well. We are expecting big energy savings due to this, which should eventually amortize the cost of our system. Green Air keeps an eye on our energy production via a remote app so they can ensure optimal performance of our solar panels, and gave us an app that allows us to keep an eye on it as well.

6. Great team: We've had visits from with 5 or 6 different technicians from Green Air during construction and installation. Each is knowledgeable, customer oriented, careful, courteous, and extremely professional.

It's been a true pleasure to work with Nick and his team. I wish they built entire homes since they are far superior to my General Contractor (which is a whole other story!)

I've been recommending Nick and Green Air to everyone I know. Hiring them was the best decision we've made on our project so far.

Robert C.
★★★★★

Nick and his team have done multiple installations for me over the years including: Solar on 2 houses, multiple Tesla Powerwalls, as Tesla charging station and a high efficiency airconditioning and heating unit for my home. Always professional, on time and on budget. Quick to follow-up with any items that need attention after the install. I plan to use Green Air again for future projects.

Scott S.
★★★★★

Still working as specified three years after installation. Roof, solar and heating and air and water heater. Love it. Manage it online.

Had a question and got a quick call back with a how to solve over the the phone with detail instruction on how to solve. Nice!

Don R.
★★★★★

Nick and his right hand partner Travis handled our solar conversion in Santa Cruz. They were always on time, always professional and did an outstanding job for us. Our roof angles and tilts proved challenging to capitalize on the solar output, but their careful planning and timely follow thru delivered a home virtually free of any needed PG&E supplement. They also installed Tesla Power walls to provide uninterrupted power supply to the home regardless of any problems on the ""grid"". We highly recommend Green Air for any such installation you may be considering. As an added bonus, Green Air coordinated the re-roofing of our home with highly efficient roof tiles more resistant to the constant flow of ocean air and sunlight. Our home value has markedly increased with this extensive work done so professionally. Top Notch in every respect.

Matt A.
★★★★★

Used Nick and team 4 years back to put in a 17KW system on two very steep roofs that all the typical solar installers refused to touch.

Nicks team was awesome, on time , on budget and even hooked us up with awesome roofers since we needed a new roof at the same time too.

Ended up having a roof guarantee problem and Nick's team had to re-attach a few ""doohickeys""...all done super fast, no issues, no complaints , no cost.

4 years later system has completely broke-even now printing money

Using Nick and team to install backup Powerwalls . All installed and working perfectly, saving me more $

U get what u pay for , use Nic and pay once ...reap the benefits.

U get what u pay for , pay once and never have any worries

Katie R.
★★★★★

We hired Nick and his team to install our solar and upgrade/replace our HVAC system. Nick and his team were very thorough and clean while working in and around our home. They spent time to go over our systems and answer all of our questions clearly. Our solar looks great and was installed quickly. We were so pleased with Green Air's work that we hired them to install a new furnace in our vacation home too.

S. B.
★★★★★

Great prices and great service. We wanted to replace our HVAC unit after the AC started failing a couple of summers back. We tried multiple companies and Nick from Green air gave us the best solution and the right cost. Our condo complex has AC condenser units on the roof with no proper access. Every other company that quoted either added a lot of money for the crane or plain refused. I was so glad when Nick came out and knew exactly what was needed and what it would cost. The all in price was very reasonable and He never tried to up sell any random extras. He also worked around our HOA requirements and was very prompt in scheduling and completing the work. I highly recommend Nick and Green air for any complicated HVAC installations.

Salvatore A.
★☆☆☆☆

Beware with this company. Get a estimate of the full cost before allowing them to start the work. We called the company and they gave us a $59 estimate for a general cleaning. The first thing the technician did was pull out one of the filter which was dirty. After seeing this he said the price would be $500. The technician was fast at excepting a lower price. Upon continuing the work he wanted to charge an additional $500 to clean the heater. I felt he came in with the additional cost to make up for the previous discount he gave when I complained about the initial $500 dollar charge. I am an apparently disabled 80 year old man and on a fixed income. To not give a cost of work in full initially is unethical. The technician put me in contact with his supervisor upon my complains and we negotiated a quick decrease in the final price. I intend to investigate further to ascertain if the final price is within the standard fee range for such work. I am making myself a pledge to check with Yelp for all future work I have done before I hire a company. You will note that in the case of Green Air the greatest amount of positive Yelp posts are 2 to 3 years old.

Ariane D.
★★★★★

Green Air is my favorite people. Every winter, I can always account on heating system to keep us worm. Our wonderful Radiated eating system was well done and, functioning so nicely worming up the whole house. I appreciate to be able to have liable teem that we can count on. We also got Green Air to do our vacation house heater as well and we are all cozy now. Thank You Nick!!

Byron D.
★★★★★

We first used Nick's company in 2011 to install our first solar system. He and his employees were prompt, took time to answer all our questions and even had to teach the local building inspector about microinverted systems, they were just becoming popular and Nick's company was in the forefront of the market.

We have used him to maintain out heating and air conditioning systems and he has once again proven to be prompt to our needs and performed all services displaying a high skill level.

We have installed two more solar array's since the first one and are very happy with all the work Nick's employees have performed over the years.

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