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.

  • INSTALLATION

*Anniversary Sale*
20% Off GulfCoat Coating

In honor of our 20th anniversary, you can get 20% off GulfCoat coating for your heat pump or air conditioning system ($190 value). This protective coating resists condensation and moisture from sea spray, humidity and other harsh environmental conditions while helping to extend the life and efficiency of your system. Not valid on HVAC rooftop or package units. Can be combined with 20% anniversary sale offers only. Restrictions apply. System must be coated by 10/31/25 to receive this offer.

  • INSTALLATION

*Anniversary Sale*
20% Off Insulation and Ductwork

In honor of our 20th anniversary, you can get 20% off ductwork and insulation. Increase the airflow and energy efficiency in your home. Valid on residential properties only. Can be combined with 20% anniversary sale offers and Federal Tax Credits only. Must mention offer at time of estimate appointment. Restrictions apply. See dealer for details. System must be installed by 10/31/25 to receive this offer.

  • INSTALLATION

*Anniversary Sale*
20% Off a New System

In honor of our 20th anniversary, you can get 20% off a new heater, air conditioner, or water heater installation. Valid on residential properties only. Not valid on HVAC rooftop or package units. Can be combined with 20% anniversary sale offers and Federal Tax Credits only. Must mention offer at time of estimate appointment. Restrictions apply. See dealer for details. System must be installed by 10/31/25 to receive this offer.

  • INSTALLATION

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 10/31/25.

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.

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!
LeRoy Lafferty
17:25 31 Jul 25
We had Guthrie and Sons replace our 50 year old house heater with a heat pump. We are very satisfied with the installation performed by Matthew and Andriy. We were impressed with the detail of their work. They paid particular attention to the required sealing and insulating of the system. Even the HERS testing inspector was impressed with their work. We were also impressed by their professionalism and honesty. They gave us an unexpected partial refund off our signed contract.
Nannette Moyer
17:41 29 Jul 25
We have been using Guthrie & Sons for 3 years and I really can’t say enough good things about them. Our technician Mario was incredibly helpful with our most recent AC issue. He spotted the problem quickly and was very knowledgeable when explaining what was happening. I appreciate their honest and fair pricing and would recommend to family and friends. Glad to have an honest company especially with all the price gauging company’s out these days.
Meghan Venanzi
23:31 22 Jul 25
We were incredibly impressed with the prompt and professional service! We called on a Saturday morning, and within just a few hours, a technician was at our home. With the recent heat, getting our AC back up and running was a top priority—and they delivered! Mario clearly explained our options and provided a hassle-free solution that was both quick and effective. The repair was completed shortly after we gave the go-ahead. We’ll absolutely be using them again for any future HVAC needs. Highly recommend this company for their affordability, efficiency, and friendly service—we’re already telling our family and friends! Thanks again Guthrie & Sons!
Laurie Edwards
22:10 16 Jul 25
We were very happy from start to finish. Vlad did a great job in helping us decide what would be best for our house and our needs and the installation crew were the very best. Thank you Guthrie and Sons for a job well done.
Patrice Makovic
17:45 09 Jul 25
Last summer, I used Guthrie and Sons to replace my heating system with a new one and added an air conditioning unit. We also added two different zones in the house to be able to turn the system on independently from one zone to another. From the first contact to the six month maintenance visits, everything has gone smoothly. There were a couple of hiccups, but the company is very responsive and I have never had an issue with them not promptly responding and taking action to figure out and solve any problem. I highly recommend this company.
Carrie Reese
17:06 08 Jul 25
Guthrie & Son's did an amazing job on our new AC units. From sales through install they were all knowledgeable and helpful. They were very quick to get us all setup and when our home posed some unexpected issues they were able to pivot quickly and resolve them. I'd highly recommend them!
Kenneth Adelson
16:04 07 Jul 25
Had use Guthrie in the past for HVAC service, this time had them install a solar attic fan and additional vent. The service, as it had been the first time, was professional, polite, and on schedule. Pricing was fair (and consider that they offered a repeat customer discount without having to be asked). Would be happy to use them again when the need arises.
I offer 4 stars because I'm not a grade inflation sort. Three is sufficient, four is better than average. Five is reserved for knock my socks off amazing in ways I didn't expect - doesn't happen very often.
Patrick Smith
21:42 27 Jun 25
We had central heat and air put in two a year and a half ago. We've need to make a few adjustments to airflow to rooms since then. Each time, they are onsite withing 1-2 days and have resolved the issue each time. Their team is professional and incredibly friendly and knowledgeable. Very happy we went to Guthrie & Sons.
Bennie Beans
15:41 12 Jun 25
Mario was knowledgeable and courteous. He made sure our system would be sized right and that our existing ductwork was able to support the new system. The install team were prompt and efficient. They installed drop cloths and cleaned up inside and out after the job. So far I’ve been very happy with the work Guthrie and Sons have done for us.
Chris Toogood
21:52 06 Jun 25
Great local family business. And you actually get a live person when you call... And the technician was great and they come out quickly. No up selling too. He gave me two different price options on fixing my problem... band aid cheaper way or replacement. Great service.

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.

8248 Ronson Road
San Diego, CA 92111
(619) 269-3013
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