San Diego, CA Ductless AC

Spend Less to Stay Cool With Our Ductless AC Services in San Diego

Whether you’re updating an older home, converting a garage, or just want better comfort control room by room, ductless mini splits give you powerful heating and cooling without the need for ductwork. Call us for a free quote on a ductless mini split installation or schedule service for an existing unit online.

Get Fast Ductless Mini Split Services in San Diego, CA at a Fair Price

Ductless mini splits are popular choices across San Diego. You’ll see them in older homes, garage conversions, guest suites, home offices, and small businesses throughout the area. Why? They’re quiet, energy efficient, and don’t need ductwork, making them ideal when adding or extending ducts is too expensive, messy, or just not possible.

If you’re thinking about going ductless—whether for your whole home or just certain spaces—we’d be happy to walk you through it. We’ll take a look at your home or business and talk about how a mini split could work for your layout, needs, and budget.

Already have a ductless system? Good for you! We bet you’ve been enjoying all of the benefits. But like any HVAC system, they sometimes need attention. If yours isn’t cooling right, making noise, or acting a little off, we’re here with ongoing maintenance or full system replacements when needed. Call now or book online for trusted ductless mini split services in San Diego, CA, with Guthrie & Sons Heating, Air & Solar.

Know What You’ll Pay for Ductless AC—And How to Cut Costs

Know What You’ll Pay for Ductless AC—And How to Cut Costs

Ductless mini split pricing isn’t one-size-fits-all—it depends on how many zones you need and what the space calls for. We get that it can feel overwhelming, which is why we make it simple: no sales games, no last-minute add-ons, just clear, fair pricing from the start. With us, you can expect:

  • Free in-home estimates so you’ll know exactly what your project will cost
  • Free online quoting tool for ductless mini split installs and replacements
  • Help applying available tax credits and rebates to cut your total cost
  • Seasonal specials and limited-time offers to help you save even more
  • Financing options with monthly payments so you can get started now

Plenty of mini split companies will sell you a system. We make sure you get the one that fits your space, your goals, and what you’re ready to spend. Schedule a consultation today!

Protect Your Investment with Smart Mini Split Service

Protect Your Investment with Smart Mini Split Service

Your ductless mini split might be quiet, but it’s doing a lot behind the scenes—cooling one room, five rooms, maybe your whole house. And if you never give it a little upkeep? Sooner or later, it’ll remind you. Usually on the hottest day of the year. Usually, when you’ve got people over. And usually, when every HVAC company in town is booked solid for days.

That’s why we offer the USA Membership. It keeps your system clean, efficient, and ready to go. You’ll get automatic tune-up reminders, discounts on services, priority scheduling during peak season, and extra perks just for ductless systems. One visit a year saves you from sweating it out later.

And if your system is under warranty, that annual maintenance isn’t optional—it’s required. We help you stay covered, save money, and avoid the stress of surprise breakdowns. Because no one wants to spend a summer weekend with no AC, no airflow, and no backup plan. Let’s keep that from happening. Talk to our team about signing up!

Reliable Ductless Services in Your San Diego Neighborhood

Reliable Ductless Services in Your San Diego Neighborhood

At Guthrie & Sons, we install and maintain ductless mini split systems across San Diego County—including homes and businesses in Chula Vista, Oceanside, Escondido, Carlsbad, Vista, and La Mesa, plus neighborhoods like La Jolla, Mission Hills, and San Ysidro.

Whether you’re adding cooling to a single room, upgrading your whole home, or need service on an existing mini split, we’ve got the experience—and the right tools—for the job. Ductless systems are what we do, and we’re here to help you get the most out of yours.

Ductless AC installation is great when you want heating and cooling without the need for ductwork. We install a small indoor unit on the wall in each room or zone you want to control, and connect it to an outdoor unit using a thin line through the wall.

Each ductless air conditioner installed runs quietly and lets you set different temperatures in different areas. These systems also work as ductless heaters, giving you year-round comfort in one setup. It’s a smart option for older homes, additions, garages, or anywhere central air isn’t practical.

Your ductless mini split air conditioner should be serviced once a year—sometimes twice if it’s running in both summer and winter. Regular ductless maintenance helps your system last longer and run more efficiently.

During a tune-up, we clean the filters and coils, check the electrical parts, test each zone, and make sure everything’s working like it should. Dirt buildup and small issues can cause big problems if left alone. A simple maintenance visit keeps things running smoothly and protects your system.

Most ductless mini splits last between 15 and 20 years. But if yours is getting older or isn’t cooling like it used to, it might be time for a replacement. When you’re ready, we’ll help you choose a new ductless mini split heat pump that fits your home’s layout, energy needs, and budget.

Newer systems are more efficient, quieter, and better at handling both heating and cooling. A ductless mini split replacement gives you better comfort with fewer issues down the road.

Not Just Another Ductless Mini Split Company—We’re a Family Caring for Yours

Not Just Another Ductless Mini Split Company—We’re a Family Caring for Yours

Guthrie & Sons started in 2005 as a small, family-run HVAC company with a simple goal: do great work and back it up with excellent service. As we’ve grown, we’ve stayed true to those roots.

We focus on giving our technicians the support, training, and tools they need to shine because when our team is set up for success, you get service that’s thoughtful, skilled, and never rushed. We’re here to help, not to be salespeople. Here’s more on what you’ll get with our local ductless mini split service company:

  • 100% Customer Satisfaction Guarantee: If it’s not right, we’ll make it right.
  • Upfront, Honest Pricing: No gimmicks. No surprise charges. Just fair numbers.
  • Expert Technicians: We have NATE-certified technicians who are at the top of the field.
  • Family-Owned: We’re one of the last family-run HVAC companies in the area.
  • Lifetime Workmanship Guarantee: When we install something, we make sure it lasts.
  • 2-Year Labor Warranty: Every new installation comes with a 2-year labor warranty.
  • Free Quotes on New Systems: Get a clear installation estimate before buying.
  • Convenient Financing Options: We offer payment plans so you have a path forward.
  • Property Protection Guarantee: From drop cloths to clean-up, we protect your space.

Frequently Asked Questions

Yes, they’re a solid option—especially if you want efficient, quiet comfort without needing ductwork. They let you control the temperature in specific rooms, which can save energy. For a lot of San Diego homes, they’re a great fit.

The upfront cost can be higher, especially if you’re adding multiple zones. Some folks don’t love the look of the wall units, and like any system, they do need regular maintenance. But overall, the pros usually outweigh the cons.

Nope. You only need units in the spaces you actually want to heat or cool. Some people just do the main living areas or bedrooms. We’ll help you figure out what makes the most sense for how you use your home.

They’re efficient, quiet, and give you more control over the comfort in each room. You won’t lose energy through ductwork, and installation is usually quick with less mess. Plus, they can both heat and cool, so they’re great year-round.

Heating and Cooling Offers You Can't Miss

Big savings, same great service. See what offers are available now in Carlsbad for our favorite customers.

$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 3/31/26.

0% APR for 24 Months

Get 0% APR financing for 24 months on a new heating or air conditioning installation. 0% interest with 24 equal monthly payments.

Financing subject to credit approval. Valid on select systems only. Valid on residential properties only. Cannot combine with other offers. Must mention promo at time of estimate appointment. Restrictions apply. See dealer for details. Offer valid for an estimate appointment scheduled before 3/31/26.

Free Diagnostic w/ a Repair

Your diagnostic service call fee will be waived if you proceed with a repair.

Cannot combine with other offers. Restrictions apply. See dealer for details. Offer expires 3/31/26.

Free Estimate on a New Heat Pump Water Heater Installation

Valid for an estimate for a new hybrid heat pump water heater installation or replacement.

Restrictions apply. See dealer for details. Offer expires 3/31/26.

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.

Rocky profile picture
Rocky
23:03 09 Mar 26
I highly recommend Guthrie & Sons; from setting the appointment to the actual service!! Daniel was prompt, able to take care of our issue at a very reasonable price. I will be using them for all our needs in the future!!!! Thanks Daniel and Mackenzie.....you were great!!
Troy Nabatilan profile picture
Troy Nabatilan
00:21 15 Feb 26
Matt and Bryan are truly the A-Team! Their teamwork was outstanding and the workmanship was meticulous. The air handler was carefully installed, wiring neatly secured, plenum perfectly fitted, and the condenser precisely positioned and leveled for proper clearance and vibration control. The line set was pressure-tested and vacuumed as well. They also left the work area clean and neat.

Please congratulate them for a job well done!
Johnathan Yang profile picture
Johnathan Yang
18:56 07 Feb 26
Guthrie and Sons was very professional and communicative. Matthew and Bryan did incredible work, and followed up with a lot of testing to make sure my new unit was functioning well. They went above and beyond to ensure that things were done correctly. I could tell their standards were extremely high, and I felt relieved seeing how much care they took in their installation. I’m very pleased with the result!
Sunyim Kim profile picture
Sunyim Kim
18:45 06 Feb 26
I called to estimate to install central air conditioner on our second floor condo. Manager came the next day very punctual and knowledgeable about the process. He listened carefully our concerns and let us to make a decision. We truly appreciate his professionalism. Thank you for your service and I would recommend anyone who needs heating and air conditioning services in San Diego.
saul profile picture
saul
18:45 06 Feb 26
Guithre and Sons distinguish themselves not only through their high level of professionalism but also by their unwavering commitment to the quality and durability of every product they sell and the meticulous craftsmanship involved in each project. The company operates with a strong dedication to integrity and respect, fostering long-term relationships with clients and suppliers alike. They prioritize transparency and ethical standards in all business dealings, ensuring customer satisfaction and trust at every interaction. Their customer service team is exceptionally responsive and knowledgeable, consistently exceeding expectations to resolve issues swiftly and effectively.
Ariana Lujan profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
David Downhour
02:47 10 Nov 25
We bought our HVAC system from Guthrie & Sons. They have been monitoring our system online and later noticed a heat sensor issue.

Zach M. came by and installed on new one. He was extremely professional and completed the installation promptly.

This was another great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.
Rachel Phillips profile picture
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 profile picture
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 profile picture
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 profile picture
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 profile picture
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.

Schedule Your San Diego Ductless Mini Split Service Today

Ductless systems are a smart way to cool and heat your home—but only if they’re installed and cared for properly. That’s where we come in. At Guthrie & Sons Heating, Air & Solar, our licensed, insured techs know these systems inside and out, and we take the time to do the job right.

We provide ductless air conditioner and heating services all over San Diego—Mira Mesa, Clairemont, Rancho Bernardo, Pacific Beach, and plenty of neighborhoods in between. If your home needs better comfort, we’re just a call or click away.