San Diego, CA Ductless AC Installation

Enjoy More Comfort, Lower Bills With a Ductless AC Installation in San Diego

Have a central air conditioner that’s costing too much—or no AC at all? If your current system is driving up your bills or you don’t have one yet, ductless mini splits are a smart solution. They’re energy efficient, quiet, and let you control the temperature in each room. We install both single-zone and multi-zone setups, depending on what your home or business needs.

Get a Free Quote for Your Ductless Mini Split Installation in San Diego, CA

If you're upgrading an older home, finishing a garage, converting a guest house, or managing multiple properties, ductless mini split systems offer a flexible and energy-efficient way to heat and cool a space without tearing up walls to run ductwork. These systems use a small outdoor compressor and one or more indoor units to control the temperature in each room, giving you custom comfort and lower energy bills.

And the savings don’t stop there. Many ductless systems qualify for federal tax credits and local rebates that can put money right back in your pocket. At Guthrie & Sons Heating, Air & Solar, we specialize in ductless mini split installation in San Diego, CA. Our licensed team will walk you through your options, help you claim every available rebate, and give you a clear, pressure-free quote. Call us or get started online—it’s fast, free, and always honest.

What is a Ductless Mini Split?

Think of a ductless mini split like a space heater and window AC had a smarter, quieter, way-more-efficient baby. It mounts high on the wall, connects to a small outdoor unit, and gives you excellent heating and cooling without needing any ductwork. That means less mess, faster installation, and comfort that’s easy to control by room.

Where can they be installed?

Older homes with no ducts in place
Converted garages, home additions, or studios
Rooms that always seem too hot or too cold
ADUs, guest houses, or rental properties
Whole homes needing zoned temperature control

At Guthrie & Sons, we install both ductless mini split air conditioners and ductless mini split heat pumps in San Diego homes, so whether you need cooling only or year-round comfort, we’ll help you choose the setup that you need.

How Much Does it Cost to Install a Ductless Mini Split?

The cost to install a ductless mini split in San Diego depends on how many rooms you want to heat and cool, how complex the setup is, and the type of system you choose. A single-zone setup is typically less expensive than a multi-zone installation, but we’ll walk you through every option.

We offer free in-home estimates and a quick online quoting tool so you know exactly what your project will cost—no surprises. We’ll also help you apply for available tax credits and rebates, take advantage of seasonal specials, and explore financing options that work for your budget. At Guthrie & Sons, we make it easy to get top-quality ductless equipment without overpaying.

Ductless mini splits are a smart solution for many San Diego homes, especially older houses in neighborhoods like North Park or Point Loma that were built without central ductwork. They’re perfect for converted garages in Clairemont, home offices in Rancho Peñasquitos, or backyard ADUs in areas like Chula Vista.

If you’ve got a room that always runs too hot or too cold, or if your family has different temperature needs in different rooms, ductless gives you personalized control without tearing up your walls.

We start with a free in-home visit anywhere in San Diego County to check out your space and learn what you want to heat or cool. From there, we’ll recommend a single-zone or multi-zone mini split based on how many areas need coverage. Installations usually take one day for simpler setups, two for larger homes.

We mount the indoor unit(s) high on the wall, run a slim refrigerant line to a compact outdoor unit, and keep everything clean. No ductwork, no drywall mess—just a quiet, powerful HVAC system that we know you’ll be happy with.

Look for high SEER, or Seasonal Energy Efficiency Ratio, ratings (18 or higher is excellent for cooling efficiency in San Diego’s long warm seasons) and solid HSPF, or Heating Seasonal Performance Factor, ratings (above 9 is ideal for efficient winter heating on those chilly coastal mornings).

Also consider noise levels (some run whisper-quiet at 19 decibels), smart thermostat compatibility, and coverage area. We'll walk you through all of it. Many of our systems qualify for federal tax credits and SDG&E rebates, and we’ll help you apply to lower your total cost. We only install top brands that we trust in our own homes, so you can count on lasting comfort.

Not at all. One of the perks of a ductless mini split is how easy and affordable it is to maintain. There are no ducts to clean, and the systems are built to be efficient and low-hassle. A yearly tune-up is usually all it takes—clean the filters, check refrigerant levels, and inspect the electrical connections. Regular maintenance keeps things running smoothly and protects your system warranty.

No matter where you are in San Diego—from the coast to the canyons—our team is here to help you stay comfortable. Whether you're just starting to explore ductless or you're ready for a quote, we’ll give you honest guidance, upfront pricing, and a system that’s right for your space.

Prevent Breakdowns and Fix Problems Fast with Our Ductless Mini Split Maintenance Services

With proper care, a ductless mini split system can last 15 to 20 years or longer. But the key is maintenance. Letting a struggling unit run without service—especially if it hasn’t had a tune-up in a while—can lead to bigger problems and shorten its lifespan.

That’s why we always recommend calling a professional mini split company at the first sign of trouble. We also suggest scheduling a mini split tune-up once a year to keep everything running at peak efficiency, avoid costly breakdowns, and extend the life of your system. We have all the ductless mini split services you need, including:

Mini Split Repair: If your mini split is leaking, blowing warm air, making odd noises, or not responding to your remote, we can help. We find the issue fast and offer expert mini split repair options.
Mini Split Maintenance: During your ductless maintenance service, we clean the filters, inspect the refrigerant lines, check the electrical components, and make sure each zone is performing the way it should.
Mini Split Replacement: If your system is older, struggling to keep up, or out of warranty, we can help you upgrade to a high-efficiency model that better fits your home’s needs.

Want your ductless mini split to last longer, run better, and cost less to own? Our USA Maintenance Plan has convenient options specifically for mini split systems. You’ll get annual tune-ups, priority service, member-only discounts, and more. Talk to our team about signing up and better protecting your investment right from the start.

Frequently Asked Questions

Absolutely—especially if you don’t have existing ductwork or need to heat and cool specific rooms more efficiently. Ductless systems give you strong, consistent comfort without the mess or cost of major construction. For many San Diego homes, they’re a smarter long-term investment than traditional HVAC.

Ductless mini splits let you control the temperature in each room, save energy, and enjoy quiet operation. No bulky ducts, no hot spots—just targeted comfort where you need it most. They also tend to be more efficient than older central systems and can even qualify for rebates and tax credits.

They do cost more upfront than window units or baseboard heaters, and some folks don’t love the look of the indoor unit on the wall. But today’s systems are much sleeker than older models—and most homeowners forget they’re even there once they feel the difference in comfort.

Ductless systems might seem simple, but installation is not a DIY job. You’ll need the right tools, training, and permits to handle refrigerant lines and electrical connections. Professional installation ensures the system runs safely, efficiently, and lasts as long as it should—with your warranty fully protected.

A single-zone system is great for one room or area, while a multi-zone setup can handle up to 4–8 rooms depending on your layout and unit size. Whether you need comfort in a single bedroom or an entire home, we’ll help design a ductless system that’s just right for your space and lifestyle.

INSTALLATION

Up to $11,225 Off a New Heat Pump

Receive up to $8,000 in HEEHRA rebates, up to $625 in Comfortably California rebates, and up to $2,600 in Federal Tax Credits when you install a new heat pump system. Must be income-qualified to receive HEEHRA rebate. Valid on residential properties only. Valid on select systems. Rebates available until funds last. System must be installed by 2/28/26 to receive Federal Tax Credits. Restrictions apply. See dealer for details.

INSTALLATION

$8,000 HEEHRA Rebate

Get income-qualified and receive an $8,000 rebate on a new heat pump system. Can be combined with up to $625 Comfortably California rebate, $2,000 heat pump Federal Tax Credit and $600 electrical upgrade Federal Tax Credit. Rebate available until funds last. Restrictions apply. See dealer for details. Offer expires 2/28/26.

INSTALLATION

$625 Comfortably California Rebate

Valid on select systems. Valid on residential properties only. Can be combined with HEERHA rebates, $2,000 heat pump Federal Tax Credit and $600 electrical upgrade Federal Tax Credit. Rebate available until funds last. Restrictions apply. See dealer for details. Offer expires 2/28/26.

INSTALLATION

$2,600 Heat Pump Federal Tax Credit

Valid on select systems. Must be installing a heat pump system with electrical wiring or panel upgrade. Valid on a primary residential home only. Can be combined with HEEHRA rebates and up to $625 Comfortably California rebates. System must be installed by 2/28/26 to receive this tax credit. Restrictions apply. See dealer for details.

Real Reviews From Real Customers

We do things differently, and our customers appreciate it. See what some of our thousands of satisfied customers have to say about working with us.

Ariana Lujan

17:43 20 Jan 26

Very helpful, quick and easy to schedule! We had an unexpected (but necessary) repair when doing maintenance and both the office and tech Carson were thorough and transparent in their support. Great service!

Graham Davis

15:37 18 Jan 26

After dealing with several HVAC companies, Guthrie & Sons clearly stood out as the most ethical, honest, and reliable. From the very beginning, their approach felt transparent and genuinely focused on what was best for us—not on upselling or unnecessary replacements.

We worked with Vlad T., who had previously been out to our home and saved us tens of thousands of dollars by getting our existing AC unit up and running when other companies were pushing for a full replacement. That experience alone earned our trust.

Now that we’re finally ready to purchase new units, there was no question that Guthrie & Sons was the only company we would consider, and Vlad was the obvious choice. He was extremely professional, punctual, and exceptionally knowledgeable, taking the time to explain options clearly and thoroughly. His expertise and honesty made the entire process straightforward and stress-free.

If you’re looking for an HVAC company you can truly trust—one that values integrity, quality workmanship, and customer service—I cannot recommend Guthrie & Sons and Vlad T. highly enough. This is how service should be done.

Blas Falconer

19:35 17 Jan 26

The layout of my condo made installing splits challenging, and before I met with Guthrie and Sons, three companies either told me that it couldn't be done. Vlad studied my apartment until he found a way to install with minimal openings in the walls and without a second condenser. Mallory, who works in the office, always followed through and advised me when I ran into a hiccup and needed detailed plans for the city. My HOA appreciated Guthrie and Sons' thoroughness and was so impressed with the design, that another resident who had been wanting splits for years, decided to install splits at the same time. The team that came in was knowledgeable, professional, and hard working. They finished a day ahead of time. I'm thrilled with the way everything looks and works.

Rob

18:12 12 Jan 26

This is by far the best company for your HVAC needs. They are honest very caring. Good fair pricing and got the job done efficiently and on time. I also signed up for their bi-yearly service which they performed the winter one and went very well. Thanks

Tania Reyes

23:47 05 Dec 25

I’ve been using Guthrie & Sons for over 15 years. They installed my whole AC system and maintained it all those years and never had an issue. Well it was time for an upgrade and they’ve recently installed my second system. The team 15 years ago and the team this time around were both amazing, professional and clean. I can’t recommend them enough Matt, Ben, Christian and Bryan get 10 stars. They are a bit pricier but worth the investment when you have peace of mind and almost two decades of great service and no issues.

Trejos Marcela

17:27 04 Dec 25

I had an excellent experience with Guthrie & Son AC & Heater Company. Their customer service was outstanding, and they took the time to answer all my questions thoroughly. Every technician who has worked on my AC/heater installation and now the ongoing service has been knowledgeable, respectful, and always on time. I highly recommend them to anyone in need of HVAC services!
I only wish the annual service was cheaper 🙂

Paula Remmel

06:34 02 Dec 25

I have a maintenance plan for my heat pump and air conditioner which Guthrie & Sons installed two years ago. I am very happy with my system as well as the maintenance plan. Wayne, one of their excellent technicians, just completed the Fall service and now the system is ready for winter use. He is knowledgeable and has been able to answer any questions I have about my system. In addition, the office at Guthrie & Sons is very responsive and follows through on any questions and concerns within 24 hours if not immediately. Great service from a great company.

Bill Cogan

22:04 24 Nov 25

Guthrie & Sons responded immediately to my online request, and was able to send someone out immediately. Zack, our technic-ian was very friendly, professional, knowledgeable and gladly answered all of our questions. He found the problem immediately, and left the work area clean and in good order. We would highly recommend Guthrie & Zack! They are real assets to our community.

Dani P

03:27 16 Nov 25

I've been using Guthrie & Sons for over 10 years and two homes. I really like that they are a family-owned and an established business. Always professional, on time, and always quality work. I've used their services from simple routine maintenance to having a new AC installed.I've never had a bad or even mediocre experience; I'm just always overall pleased with their work.

David Downhour

02:47 10 Nov 25

We needed a new A/C and furnace system. Vlad came by to listen and assess our needs, recommend our new Daikin, and put forth our best estimate.

Carson C. and Michael J. came by to install our unit. They were on time, extremely professional and worked diligently to complete everything. They listened to our needs throughout and made adjustments to our specifications. Carson did not leave until we were totally happy with our unit.

This was a great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.

Rachel Phillips

22:24 02 Oct 25

We recently had our A/C replaced by Guthrie & Sons, and I cannot recommend them highly enough. After getting five different bids, Guthrie & Sons stood out immediately—not just on price, but on expertise and professionalism. They even brought their engineers out to ensure the work could be done the right way, which gave us tremendous peace of mind.

From start to finish, their team was outstanding. They worked incredibly hard, treated our home with respect, and left everything spotless—truly the cleanest job site I’ve ever seen after a major project. The installation itself was seamless, and the quality of their work shows in every detail.

If you’re looking for a company that combines deep knowledge, excellent craftsmanship, and genuine care for their customers, Guthrie & Sons is it. Absolutely five stars across the board!

Liz Staff

17:27 02 Oct 25

We had a wonderful experience with Guthrie and Sons. Anthony was our estimator and he did a very thorough job of explaining all of our options! Matthew, Bryan, and Isaiah were our installers and they were very efficient, capable, and personable. Our home did not have an existing HVAC system so they had to build the whole thing in an older house that had undergone several additions. We were up and running in just three days. They left the worksite clean at the end of each day. We highly recommend Guthrie and Sons!

Neil Domingo

18:09 27 Sep 25

Kareen did an outstanding job with our HVAC system. From start to finish, he demonstrated professionalism, patience, and a strong commitment to getting the job done right. Even when faced with several unexpected challenges, he handled each one with skill and determination, never compromising on the quality of his work.

What really stood out was his problem-solving ability and willingness to go the extra mile to ensure everything was operating as it should. He communicated clearly throughout the process, kept us updated, and made sure we felt confident in the work being done.

It’s not often you come across someone who combines technical expertise with such a strong work ethic and positive attitude. We’re very grateful for his efforts and would highly recommend Kareen to anyone needing reliable HVAC service.

Trae Washburn

02:56 16 Sep 25

Professional from beginning to end

Vlad came out to provide an estimate and was able to size an HVAC system that worked well for my house.

They installed it quickly, without issue and helped me set up an app on my phone to control.

The system is working great to heat and cool my house and is whisper quiet.

Highly recommend going with Guthrie and Sons if you want a high quality experience for large and important purchases.

David Maycock

01:10 08 Sep 25

Our two old furnaces needed replacing and so we contacted Guthrie & Sons because of their good reputation. They sent Zach the next morning. He quickly verified that our two furnaces were beyond repair and Guthrie could supply and install suitable replacement funaces. He also suggested and explained alternative solutions, but we eventually decided to go ahead with furnace replacement. As soon as we notified Guthrie & Sons of our decision they arranged for Cristian and Pablo to come to our house the next day. They did a good job, explained clearly how to operate the new furnaces and thermostats, and were respectful of our house.

Erin Guthrie

19:21 03 Sep 25

Daniel was quick and professional. Fixed our AC problem in an hour and the price was very transparent and beyond fair. Didn’t push the subscription maintenance service, simply said it would be a good idea due to the age of our unit. Highly recommend!

Tomankhamen

18:03 28 Aug 25

We had to replace a thermostat that had gone bad. In the old days, I could do it myself. Now, though, the programming of the thing requires technical knowledge that I don’t have. The Guthrie guy that did the job was courteous, professional, and as fast as anyone could be. This has been our experience with Guthrie & Sons for every repair, retrofitting, and equipment replacement that they’ve done for us over quite a number of years now.

Gabrielle Benjamin

18:15 25 Aug 25

Carson Snyder and co-worker (Pablo?) did a great job on the installation of the mini-split cassette. They're hard working, they clearly knew what they were doing, polite, cleaned up afterwards, true professionals. I'd gladly recommend these two gentlemen. However, the Company was not good at keeping me informed although I mentioned to the salesman up front that I was information driven. They were short on details and communicated seldom. Anthony did tell me about the government program available that reduced my cost. I wouldn't have known about it if he didn't mention it. The City did approve their work and signed off on the permit which is an indication of the job done right. I think the Company can improve their customer service

robert johnson

00:53 11 Aug 25

Very pleased with the service we received from Guthrie & Sons! Our AC system needed to be replaced after a huge leak. The tech that came out for diagnosis, Mario, took the time to explain the issue to us, as well as our options for repair. They came out on a Saturday to diagnose and it was fixed the following Tuesday. Matthew was the worker that completed the repair and he did an excellent job. Pricing was reasonable. Much more reasonable than the first company we had come out to take a look. We upgraded our system and our SDG&E bill has already gone down. Highly recommend!

K N

15:52 01 Aug 25

Very knowledgeable and professional. Quoted product was high quality and fair pricing. I highly recommend We ended up not going with them only due to the fact we were also getting Solar and ended up going with one company for our project but I would definitely do business with this company in the future if we need it!

Talk to Us About Your San Diego Ductless Mini Split Installation

Guthrie & Sons Heating, Air & Solar has been serving San Diego since 2005. Back then, ductless mini splits weren’t nearly as popular—but today, they’re one of the smartest ways to heat and cool your home. We’ve installed hundreds of systems across all kinds of spaces: homes, garages, rentals, additions, and even small businesses.

We’re proud to still be one of the few family-owned HVAC companies in the area. And when you work with us, you’ll feel that difference. We treat people right. We show up on time, respect your space, and give you honest advice. No pressure. No upsell. Just the right solution for your needs—and your budget.

Take a look at our reviews to see how we work, and when you’re ready, reach out for a free quote on your ductless AC installation in San Diego. We’d love to help!

8248 Ronson Road
San Diego, CA 92111

(619) 269-3013

San Diego, CA Ductless AC Installation

Enjoy More Comfort, Lower Bills With a Ductless AC Installation in San Diego

Get a Free Quote for Your Ductless Mini Split Installation in San Diego, CA

What is a Ductless Mini Split?

How Much Does it Cost to Install a Ductless Mini Split?

Not Sure Where to Start? Our Ductless Installation Services Cover It All

Who’s a Good Fit for a Ductless Mini Split?

How the Installation Process Works

What to Look for in a Mini Split System

Are Ductless Units Expensive to Maintain?

Prevent Breakdowns and Fix Problems Fast with Our Ductless Mini Split Maintenance Services

Frequently Asked Questions

Is it worth installing a ductless air conditioner?

What are the advantages of ductless AC?

What are the disadvantages of ductless AC?

Can I install ductless AC myself?

How many rooms can a ductless AC cool?