HVAC for Small Businesses
HVAC for Small Businesses in Marin, Sonoma & Napa County

Are you looking for a commercial heating, ventilation, and air conditioning (HVAC) company to keep your small business comfortable and safe? Worried that your electrical or plumbing needs are “too small” compared to larger facilities? Worry not! Ongaro & Sons provides services to businesses of all sizes.
Call us today for all your light commercial services. Whether you need an HVAC company to replace your packaged rooftop unit (RTU) or just need a quick drain repair, our team of licensed professionals is ready to assist you.
We offer Ongaro Maintenance Plans that provides peace of mind and guarantees you will always be at the front of the line whenever you need us. Plus, our financing options (subject to approved credit) help ensure you get the equipment that helps your business and fits your budget.
For a consultation on how we can help your small business, call us at 415-741-2820 or request services online. You will never go wrong when you call Ongaro & Sons.
Why Choose Ongaro & Sons?
As a family-owned company with deep roots in the North Bay, we understand the challenges of running a successful business. Our goal is to service your HVAC, plumbing, and electrical equipment so you can focus on what’s most important: your employees and customers.
Our coverage area extends from Marin to Napa and Sonoma counties, as well as all the communities in between. We back our work with a warranty. Want to learn more about us? Check out our 5-star Google reviews and an A+ rating with the Better Business Bureau (BBB).
Small Business HVAC Solutions

At Ongaro & Sons, we specialize in delivering dependable HVAC services tailored to the needs of small businesses. As a fully licensed, bonded, and insured contractor, we bring not only peace of mind but decades of hands-on expertise to every job. Whether you need installation, repair, or maintenance, our team understands the importance of comfort, energy efficiency, and minimal disruption to your operations. We’re committed to providing cost-effective solutions and long-term value for your business.
Marin, Sonoma & Napa County Light Commercial Installation and Replacement Services
Ongaro & Sons understands that installing unique commercial heating and cooling options makes it easier for any business, large or small, to enjoy the comfort and health your customers and employees deserve. Schedule your appointment online today for a free consultation about our installation and replacement services.
Commercial Air Conditioning (AC) Maintenance and Repair
A broken AC system means lost productivity and business. We provide prompt commercial air conditioning repair services that address your system malfunctions whenever they occur. Let’s work together to develop a maintenance plan that makes sense for your budget and equipment and can help you avoid a costly repair bill by catching minor issues quickly.
Commercial Furnace Maintenance and Repair
Don’t let your employees and customers get caught in the cold this winter. Our licensed professionals at Ongaro & Sons can maintain and repair your heating equipment to ensure everyone in your business stays comfortable and safe.
Our technicians will evaluate your equipment to create a maintenance plan that improves energy efficiency, lowers heating costs, and protects against sudden breakdowns.
Light Commercial Electrical and Plumbing Services
Light Commercial Electrical Services
Ensure your commercial space runs efficiently and safely with our expert light commercial electrical services. From new builds to tenant improvements, we provide dependable installation, prompt repairs, and proactive maintenance to keep your systems performing at their best.
Whether you’re constructing a new commercial space or upgrading an existing property, professional electrical installation is key to long-term performance and safety. Our licensed electricians specialize in designing and installing electrical systems that meet code requirements and support your business’s specific needs.
- Lighting, outlets, service panels, dedicated circuits, and energy-efficient upgrades
- Fast diagnosis and repair for flickering lights, circuit breaker issues, faulty wiring, power outages, and equipment malfunctions
- Scheduled maintenance to detect wear and tear, test safety devices, check panel loads, and ensure all connections are secure

Light Commercial Plumbing Services
Keep your business flowing smoothly with our reliable light commercial plumbing services. From new installations to routine maintenance, we provide comprehensive plumbing solutions tailored for small commercial properties.
Schedule MaintenancePlumbing System Installations
Starting from scratch or renovating an existing space? We provide professional installation services for water lines, drains, sinks, toilets, commercial-grade fixtures, and water heaters. Whether you’re opening a café, salon, or retail shop, we ensure all plumbing is installed efficiently, up to code, and built to handle your daily operational demands. We also specialize in ADA-compliant bathroom setups and grease trap installations for food service businesses.
Commercial Plumbing Repair
Unexpected plumbing problems can bring your business to a halt. We respond quickly to diagnose and fix clogged drains, leaking pipes, broken fixtures, running toilets, water pressure problems, and more. Our skilled plumbers work to resolve issues with minimal disruption, using the latest tools and techniques to ensure long-lasting solutions.
Commercial Plumbing Maintenance
Prevent plumbing emergencies with regular system checkups and proactive maintenance. We offer customizable maintenance plans to inspect water lines, clean drains, test backflow preventers, and service water heaters and sump pumps. Scheduled maintenance helps detect issues early, extend the life of your plumbing systems, and avoid costly repairs or downtime. It’s a smart investment in your business’s infrastructure.
HVAC Solutions for Your Small Business
California's Small Business HVAC Maintenance & Repair Experts
Let us take care of your HVAC system, so you can take care of your business.
Ongaro & Sons understands the unique heating and cooling needs of businesses large and small, making it easy to enjoy the comfort and health your customers and employees deserve. Schedule online today for a free consultation about our installation, replacement, maintenance, and repair services.
We Have Solutions For All Your HVAC Needs
Discount
Commercial Maintenance
Ongaro Commercial Maintenance
Proper preventative maintenance for your commercial system is a must for lower energy bills, fewer unexpected costly repairs, and a longer system life span. No matter what type of commercial heating, cooling, plumbing, or electrical system you have, indoors, outdoors, or a combination, Ongaro & Sons' commercial professionals have the expertise to maintain it all.
Cost & Energy Savings
Keeping your equipment in optimal condition helps you avoid unexpected costly repairs, and when your system runs at peak efficiency, you save energy and money.
Validated Warranty
Regular professional maintenance validates your commercial system's manufacturer warranty. Proof of maintenance goes a long way with any claim, should the need arise.
Customized Plan
You are not a cookie-cutter company, and neither should your maintenance be. Talk to us about designing a commercial maintenance plan just for you.
Schedule Your Small Business HVAC Service
Whether you need a packaged rooftop unit replacement, heating or cooling repair, electrical work, or plumbing support, our licensed light commercial team is ready to help. We proudly serve Sonoma, Marin, and Napa counties, including Santa Rosa, Bodega Bay, San Rafael, Novato, Glen Ellen, and surrounding cities. Call us now at 415-741-2820 or book your appointment online.
Your Comfort, Our Priority
Ongaro & Sons is your trusted heating, cooling, plumbing, electrical, and solar expert, specializing in reliable maintenance and repair services that keep your home running efficiently year-round.
Our certified technicians deliver unmatched expertise with fast, friendly service across Marin, Sonoma and Napa County. From HVAC tune-ups to plumbing repairs and electrical upgrades or solar solutions, we focus on energy-efficient performance and long-term comfort. Count on us to maintain the systems that power your home and keep your environment just the way you like it.
Licensed, Insured, Background-Checked
Our technicians are licensed, experienced, and trained to service all makes and models.
Locally Owned and Operated
Serving the Napa, Marin, and Sonoma communities with personalized, hometown service.
Reliable Repairs
We respond quickly and get the job done right the first time, with no surprises.
Since 1932
Why Ongaro & Sons for Small Business Service
A small business cannot absorb a day of closure, which changes what good service actually means.
Schedule Service →One call covers HVAC, plumbing and electrical
For a business without a facilities manager, the value is not having to work out which trade to call.
Work scheduled around trading hours
Before opening, after closing, or on your quiet day. Agreed before the job, not negotiated on site.
The price is agreed before work starts
You approve the number first, which is what makes the cost plannable rather than a surprise on the invoice.
Repair and replace weighed on the business case
For equipment near end of life, we will set out what repair buys you and what it does not, so the decision is yours with the numbers visible.
A local family business serving local businesses
Ongaro & Sons has been owned by the same family since 1932 and works with independent operators across the North Bay, from Petaluma out to the coast.

Discount
Membership
Ongaro Maintenance Plans
Annual maintenance on your home systems provides safeguards and comfort to you and your family. Members get priority scheduling, discounts, and proactive checkups that catch problems early.
Member Discounts
5% off every repair and replacement, all year long.
Peace of Mind
Proactive checkups catch issues before they become big problems.
Courtesy Reminders
We call you to schedule: never miss a seasonal service.
Value That Lasts
With Ongaro & Sons, you’re investing in quality, integrity, and service that stands the test of time. Explore our current promotions and see the difference real value makes for your HVAC, plumbing, and electrical needs.
From the Blog
May 7, 2026Ceiling Fan Direction In Summer: Which Way And Why
Ceiling fan direction for summer is counterclockwise: push air down for a wind chill effect, then raise the thermostat 4 degrees. The science.
Read More
May 1, 2026Wildfire Smoke & Indoor Air Quality In Marin & Sonoma
Wildfire smoke contains PM2.5 and toxic gases standard HVAC filters miss. What protects indoor air quality across Marin, Sonoma and Napa County.
Read More
Apr 29, 2026HVAC Permits In Marin And Sonoma County
Unpermitted work creates insurance risk and sale complications in Marin, Sonoma and Napa County. What permits protect and how to verify your contractor.
Read MoreFrequently Asked Questions
How do I know if it is time to replace my commercial HVAC system?
Typically, well-maintained commercial HVAC systems last around 15 years. However, if you notice rising energy bills or frequent repair needs, it might be time to consider new, energy-efficient equipment. That way, you can enjoy maximum efficiency and comfort for your customers, guests, and employees while reducing your monthly heating and cooling costs.
How often should I maintain my commercial HVAC equipment?
Regular maintenance is crucial to keep your system running efficiently and to maintain your warranty. It’s akin to regular oil changes for a vehicle. Your air conditioner and furnace should be inspected and maintained annually.
Is it better to repair or replace my commercial heating and cooling system?
Generally, repairs might be the best option if your commercial HVAC system is relatively new or the damage is minor. However, upgrading to a new system might be more economical and efficient for more severe issues, especially those not covered under warranty.
What are the advantages of professional commercial HVAC maintenance?
Benefits of professional HVAC maintenance include inspection, cleaning, and prompt resolution of potential issues. Regular maintenance can improve your commercial HVAC system’s energy efficiency. According to the U.S. Department of Energy (DOE), commercial buildings consume 40 percent of the energy used in the United States . Imagine reducing a portion of that and how much you could save in heating and cooling costs each month! Ask us about a customized maintenance plan tailored to your business needs and budget. Maintenance plans offer a hassle-free way to care for your HVAC system and avoid unexpected repairs.