Bay Area's Trusted HVAC Experts Since 1978

Three generations of family-owned comfort — no commissioned salespeople, just honest advice from our owner directly to you

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Schedule My Service

925-584-2634

Licensed & Insured

3rd Generation Family- Owned

A+ BBB Rating

PACE & REEL Program Approved Contractor

Proudly Serving Oakley for 47 Years -

We offer a Low Price Guarantee on all new equipment installations. If you receive a comparable estimate from a licensed competitor, we will beat their price by at least 5%.

Services We Provide

Jim's Air Systems provides reliable heating, air conditioning, mini split, heat pump, indoor air quality, and HVAC maintenance services designed to keep your home comfortable year-round.

Air Conditioning

We provide professional air conditioning services to keep your system running efficiently, improve indoor comfort, and help prevent unexpected breakdowns.

Installation

Maintenance

Replacement

System Troubleshooting and Diagnostics

Repair

Energy-Efficient System Upgrades

Explore Our AC Services

Schedule My AC Services

Two outdoor air conditioning units installed beside a house on a paved surface with nearby bushes.

Heating

We provide dependable heating services to ensure your system operates safely, efficiently, and reliably throughout the colder months.

Installation

Maintenance

Replacement

System Trouble Shooting and Diagnostics

Repair

Energy-Efficient System Upgrades

Explore Our Heating Services

Schedule My Heating Services

Close-up of a person wearing white and orange gloves using a wrench to adjust a metallic pipe manifold with white valve knobs.

Water Heaters

We offer expert installation, repair, and replacement services for both traditional tank and modern tankless water heaters to ensure your home never runs out of hot water.

Installation

Maintenance

Replacement

System Trouble Shooting and Diagnostics

Repair

Energy-Efficient System Upgrades

Explore Our Water Heater Services

Schedule My Water Heater Services

Heat Pumps

Our team specializes in the installation, maintenance, and repair of advanced all-electric and dual-fuel hybrid heat pump systems for year-round comfort.

Installation

Maintenance

Replacement

System Trouble Shooting and Diagnostics

Repair

Energy-Efficient System Upgrades

Explore Our Heat Pump Services

Schedule My Heat Pump Services

Indoor Air Quality

We provide indoor air quality solutions designed to reduce airborne contaminants, improve airflow, and create a healthier living environment inside your home.

Air Filter

Duct Cleaning

Air Purifier

Ventilation system upgrades

Humidity Control and Balancing

Indoor air quality testing

Explore Our IAQ Services

Schedule My IAQ Services

Modern living room with air purifier in front of glass doors, showing blue airflow lines indicating air circulation.

Mini Split

Ductless mini-split systems provide efficient heating and cooling without the need for ductwork. They improve airflow, reduce airborne contaminants, and deliver targeted comfort for a healthier, more comfortable home.

Ductless Installation

Mini Split Repair

Ductless Repair

Mini Split Service

Explore Our Mini Split Services

Schedule My Mini Split Services

Modern living room with white sectional sofa, blue pillows, potted plants, and large glass window showing green trees outside.

Smiling technician in red uniform showing clipboard to woman in striped shirt outside a house.

Three male technicians in a workshop smiling and talking, one holding a tablet and another holding a measuring device.

Our Story: Three Generations of Comfort

Jim’s Air Systems is a local family owned and operated heating and air conditioning company servicing the bay Area for the past 47 years. The founder James Arellano started the company in 1978 and is now operated by his son Joshua Arellano since 2005. Joshua’s sons are now working with us and are now the 3rd generation of HVAC installers. We specialize in the installation, repair and servicing of Heating, Air conditioning, indoor air quality, solar PV, and water heaters for residential, commercial and new construction custom homes. All of our work is done in house and custom designed by our team with over 90 years of installation experience. We pride ourselves on the highest quality workmanship and great customer service. Most of our customers are referrals from previous customers, their family and friends.

Joshua as the owner since 2005

3rd generation installers

No-commission salespeople

Your Comfort, Simplified. The Jim's Air Systems Process.

Reliable heating and cooling solutions keeping Oakley homes comfortable year-round.

Schedule Your Free Estimate

Call us or book online. You'll speak directly with our friendly team to find a time that works for you.

Meet with the Owner

Joshua Arellano, our owner, will personally visit your home to assess your needs, answer your questions, and provide a detailed, no-pressure estimate.

Expert Installation

Our 3rd generation installation team, with over 90 years of combined experience, will complete your project with the highest quality workmanship.

Protect Your Investment. Join the Jim's Air Systems Family.

Don't wait for a breakdown. Our pre-paid maintenance plan ensures your HVAC system runs efficiently year-round, saving you money on energy bills and costly repairs. For just a small investment, you get peace of mind knowing your comfort is guaranteed.

Pre-Paid Maintenance program

We will come out and inspect the system and change the air filter every 6 months. 10% off any repairs or new equipment installation.

$225

/Yearly prepaid

Twice-yearly (every 6 months) tune-ups)

Air Filter changes

10% Off any needed repairs

Services for changing out AC Systems

Maintenance plan

We will come out and inspect the system and change the air filter every 6 months. 10% off any repairs or new equipment installation.

$19.95

/Monthly plan

Twice-yearly (every 6 months) tune-ups)

Air Filter changes

10% Off any needed repairs

Services for changing out AC Systems

$50 Off Any Repair

Save $50 on any HVAC repair with professional service you can trust.

Call to Claim

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5% Discount for Seniors & Veterans

We offer a $5 discount for seniors and veterans as a thank-you for your service.

Call to Claim

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Federal Tax Credits Available

Federal tax credits may be available to help reduce the cost of qualifying energy-efficient upgrades.

Call to Claim

One time Tune up special is $79

Schedule a professional system check-up to ensure your heating or cooling system is ready for the season ahead.

Call to Claim

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Quality Equipment for a Quality Installation

We install all makes & models

A great installation starts with great equipment. We partner with the industry's most trusted manufacturers to bring you reliable, high-efficiency HVAC systems that last.

Schedule My Service

925-584-2634

We Install All Makes & Models of Equipment

Proudly Serving the Contra Costa County since 1978

We provide expert HVAC services to homes and businesses in Oakley, Brentwood, Antioch, Discovery Bay, and many other communities throughout the Bay Area. See our full list of service areas to find out if we're in your neighborhood.

View All Service Areas

925-584-2634

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Financing

Multiple financing options available
0% financing available
Must mention at time of estimate due to possible financing program changes.

Explore Financing Options

925-584-2634

What Our Customers Are Saying

Here’s what our customers have to say about their experience with our team and services.

Jim's Air Systems had the best value for my dollar. They supplied me with better equipment than they quoted for the same price. They completed the entire installation in about five hours. Josh, the son of the original Jim, was on the job working with the other two installers. They performed above my expectations and left my home and yard as clean as if they had never been there. I would recommend Jim's Air Systems unconditionally to anyone in need of a new furnace and AC system.

Allen S.

I found Jim's Air Systems through HomeAdvisor, and Josh was the first contractor to reach out to me personally, not through an automated service. Communication with him was excellent. His team arrived on time, completed the work as scheduled, obtained the required permit, and left my home as clean as they found it. Overall, a great experience and a solid value. I wouldn't hesitate to recommend them.

Michael B.

Josh responded quickly, quoted the best price, and supplied good Day & Night brand equipment.

Jen D.

The job was completed within a month, took three days, and the new system is working beautifully. The price was about $10,000 less than competitors.

Mark G.

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