Los Altos

Heating and Air Conditioning Services in Los Altos, CA

We Know These Homes. We've Been Working on Them Since They Were Built.

Most of Los Altos was built in the late 1940s and 1950s, when apricot orchards gave way to ranch-style subdivisions almost overnight. Those homes were well-constructed for their time. The HVAC systems that came with them, or were added later, have a long history of upgrades, workarounds, and modifications that don't always add up to a coherent system. A kitchen addition here, a room conversion there, and original ductwork running through walls it was never designed to serve. By the time a family has owned one of these homes for 15 years, the HVAC system may be carrying a load it was never sized for.

AAA Furnace & Air Conditioning has been serving Los Altos since Joe Rando founded the company in San Jose in 1957, the same decade most of these homes were built. Our current owner, Joe’s son, grew up learning the trade alongside him. We're an authorized Carrier dealer, EPA-registered, and a BBB Accredited Business with an A+ rating, having completed over 10,000 projects across Silicon Valley.

Contact us at (408) 521-1259 to schedule an HVAC assessment in Los Altos. We look at the house before making any recommendations.

From a Repair That Can't Wait to a Replacement You've Been Planning

Whether your system stopped working or you're trying to get ahead of a failure you can see coming, we handle the full range of residential HVAC services in Los Altos.

We offer the following:

Air conditioning services
Heating services
Heat pump services
Ductless mini-split services
Duct cleaning
Indoor air quality services

When a new installation is involved, we provide a free estimate after assessing your home, so the number you see reflects what your house has and what it needs.

What Your System Was Sized for and What Your House Is Now Are Often Two Different Things

Los Altos ranch homes from the 1950s and '60s were designed with a specific floor plan and load requirements. Over the decades, many have been significantly changed: bonus rooms, expanded kitchens, converted garages, second-story additions. Each of those changes shifts the heating and cooling load without anyone necessarily revisiting whether the system can handle it. An undersized system runs constantly without getting there. An oversized one short-cycles and never properly dehumidifies. Neither problem is obvious until someone measures the house as it stands today.

Our comfort advisors assess the current square footage, ceiling heights, insulation quality, duct condition, and any changes you have made before recommending any equipment. Old Los Altos homes near University Avenue, with their 1920s to 1940s construction and later additions, have a different set of variables than the postwar ranches in North Los Altos or the newer builds near Foothill Expressway. The recommendation has to account for which house you have.

Find Out Where Your System Stands Before a Failure Makes the Decision for You

If your system is aging but still running, the question is whether you make the replacement decision on your schedule or the system's. A comfort advisor who assesses your home can tell you where the equipment stands: what's worn, what's performing correctly, and what the realistic timeline looks like. Free estimates for new furnace and air conditioner installations give you a real number to evaluate before committing to anything.

We arrive to answer a specific question: what does this house need? If the answer is a repair, that's what we recommend. If it's a replacement, we tell you why and what the options cost. Financing is available for larger projects.

How we can Help:

Frequently Asked Questions About HVAC Services

The following are the questions we hear most often from homeowners before a first visit.

My House Has Had Several Additions Over the Years. Could That Affect My HVAC System?

It often does. Ranch homes built in the 1950s and '60s were sized for a specific floor plan. When square footage increases through additions or conversions, the original system may not be able to meet the new demand, which shows up as rooms that never reach setpoint, systems that run constantly during hot weather, or uneven temperatures throughout the house. Our comfort advisors assess the current configuration of the home, not just the square footage on the permit.

What Does a Comfort Advisor Check During an Assessment?

Duct condition and sealing, equipment age and performance, refrigerant charge and coil condition, heat exchanger integrity on any gas furnace, ceiling height, insulation quality, and whether the system was ever correctly sized for the home as it currently exists. In Los Altos ranch homes specifically, we pay close attention to how ductwork routes through the original structure and any additions, because those configurations often create pressure imbalances that affect performance regardless of equipment quality.

Do You Offer Financing for Larger Installations?

Yes. Financing is available for larger installations, including new furnaces and air conditioners. The application is submitted directly online, and we walk you through the options before any work begins, so you're not making a major financial decision without understanding what's available.

10,000 Projects Across Silicon Valley Means We've Seen Systems Like Yours Before

More than 10,000 projects completed across Silicon Valley since 1957 show up in a specific way: our technicians recognize the failure patterns common in the local housing stock before they pull the first tool out of the truck. The ductwork configurations in 1950s ranch homes. The equipment choices made during the remodel boom of the 1980s and '90s. The California Title 24 compliance issues in newer construction near the Foothill Expressway corridor. A technician who's worked in enough of these homes stops being surprised by any of them.

Hector, Josh, Aaron, and Hal appear by name in our reviews because they explain what they're doing before they do it. When one of them walks through what the inspection found and tells you what it means before writing a line on an estimate, you're making an informed decision based on your house.

AAA Furnace & Air Conditioning is an authorized Carrier dealer, which means the full manufacturer's warranty is preserved on every Carrier installation we complete. Every job carries our own one-year warranty on parts and labor. If something isn't right, our owner wants to hear about it personally.

We serve homes throughout Los Altos, from Old Los Altos and North Los Altos to South Los Altos and the surrounding communities. Call (408) 521-1259 or message us online to schedule an appointment.

Why Choose AAA Furnace & Air Conditioning?

Warranties on Parts & Labor
Your comfort and peace of mind are our top priorities. That’s why we stand behind our work with a comprehensive one-year warranty on both parts and labor, along with additional warranties for added protection.
Free Estimates on Installations

We proudly offer free estimates on new equipment installations, including furnaces, water heaters, air conditioners, as well as duct cleaning services. Our team provides honest assessments and clear recommendations, ensuring you have all the information you need to make a confident, informed decision.
Financing Available
To make your investment even more accessible, we proudly offer flexible financing options through Service Finance. Our financing solutions are convenient and designed to fit your budget. This allows you to move forward with confidence and comfort—without financial stress.
Family-Owned & Locally Operated in Silicon Valley
At AAA Furnace & Air Conditioning, we take pride in treating our customers with care and respect. We are committed to doing right by our clients, ensuring that each project is approached with a focus on fairness and integrity. Unlike companies that treat customers as mere numbers, we see each client as a valued member of our community, deserving of individualized attention and top-notch service.
Personalized & Tailored HVAC Solutions
As a family-owned business, AAA Furnace & Air Conditioning takes pride in providing personalized service to every customer. We believe in treating our clients like family, ensuring that each interaction is tailored to meet their unique needs and preferences. Our team prioritizes building lasting relationships with our customers, offering a level of care and attention that sets us apart from larger corporations.
Transparent & Competitive Pricing
When you choose AAA Furnace & Air Conditioning, you can expect exceptional pricing without compromising on quality. We believe in fair and transparent pricing, offering honest assessments and upfront pricing to our customers. Our goal is to ensure that you receive the best value for your investment, without any hidden costs or surprises.
70 Years of Experience
One of the key reasons to choose AAA Furnace & Air Conditioning is our unwavering commitment to our customers. Unlike many businesses that may not outlast the warranties they offer, we stand by our work, providing reliable warranties on our HVAC equipment that reflect our confidence in the services we provide. This long-standing dedication to excellence sets us apart from the competition.

I would like to thank AAA for a wonderful job.
“I am happy with the cool and warm home. My installers Hal and Josh-H were very professional and completed on time.”

Elvira R.
Highly recommend him and would have him come out again.
“Josh came out and did a very thorough job of cleaning and checking my HVAC, also my water heater.”

Diane H.
They were done in about 3 hours and the end result looks & runs great.
“We're very satisfied with the quality of service we received with AAA Furnace and will be reaching out to them again for any future HVAC needs.”

Matt W.
They were prompt, respectful, courteous and had excellent customer service.
“In under 4 hours they had the issue fixed. They also uncovered issues w/our ducting that had been missed on prior visits.”

Joanna G.
Friendly, thorough and conscientious about their work
“We have been customers of AAA Furnace & Air Conditioning for a number of years now. We have always been impressed with the personnel and the quality of the work and have never been disappointed.”

Jim R.
Thanks to Hector and Alan for providing quality service.
“They are very professional and do good work. We've been using them for a few years and plan to continue.”

Clayton
He even left a spare air filter for the next time they need to be replaced!
“Hector went above and beyond with service today to ensure every part of my heater/ac unit was checked and cleaned.”

Sara B.
FANTASTIC SERVICE!
“Got the heater up and running best of all, my dog loved him!”

MC Larsen
We recommend them in a heartbeat.
“Excellent work, they were here four days installing ducts and heaters. They are very neat, thoughtful in explaining the process.”

Josh S.

More Testimonials

Proudly Serving Throughout Silicon Valley

(*) Services in these cities are limited to FREE estimates and new installations only.

Get In Touch

contact aaa Furnace & Air conditioning today

First Name
Last Name
Phone
Email
Address
Are you a new customer?
How can we help you?
By submitting, you agree to receive text messages from AAA Furnace & Air Conditioning at the number provided, including those related to your inquiry, follow-ups, and review requests, via automated technology. Consent is not a condition of purchase. Msg & data rates may apply. Msg frequency may vary. Reply STOP to cancel or HELP for assistance. Acceptable Use Policy