San Diego, CA Ductless AC

Spend Less to Stay Cool

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 air conditioner or schedule service for an existing unit online.

Need Ductless Mini Split Services in San Diego? We Do It All!

Ductless mini splits are everywhere in San Diego, and we love what they bring to the table. From older homes and garage conversions to guest suites, home offices, and business buildings, these systems fit right in! Ductless mini split units are compact, quiet, and energy efficient. Best of all, they don’t rely on air ducts, so you can install them just about anywhere you need AC.

If you’re thinking about installing a ductless air conditioner, Guthrie & Sons Heating, Air & Solar can help you find the right system and get everything set up in no time.

Already have a ductless system? We bet you’ve been enjoying everything they have to offer! But like any HVAC system, they need regular upkeep and only last so long. If yours is due for service, needs a repair, or is ready to be replaced, just let us know. Call now or schedule online for trusted ductless mini split services in San Diego, CA. Family-owned. Fast service. Fair prices. Everything you both want and deserve!

Know What You’re Paying for (And How to Save More)

Know What You’re Paying for (And How to Save More)

We know you have questions, and “how much does a ductless mini split cost?” is usually the first one. The answer depends on a few things, like how many zones you need, the size of your space, and the system that fits best. We break it all down for you so you know exactly what you’re paying for. No hidden fees, no last-minute add-ons—that’s not how we do business. With us, you can expect:

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

Protect Your Mini Split Air Conditioner With a Maintenance Plan

Protect Your Mini Split Air Conditioner With a Maintenance Plan

Your ductless mini split may be small, but it does a big job every day—cooling one room, five rooms, maybe your whole house! And since it works as a full heating and cooling system, it doesn’t get much of a break. If you don’t give it the TLC it needs, 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 out for days.

That’s why we offer the USA Membership. It keeps your system clean, improves energy efficiency, and ensures all parts are in good shape. You’ll get automatic tune-up reminders, discounts on services, priority scheduling during busy times, and other perks. One visit a year saves you a heck of a lot of trouble later.

And if your ductless 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. No one wants to spend a summer weekend with no AC. Let’s protect your investment and peace of mind. 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. We’re also regularly out in neighborhoods like La Jolla, Mission Hills, and San Ysidro. 

Whether you’re cooling individual rooms, working around existing ductwork, or trying to stop wasting energy, ductless systems are a smart solution. Explore our affordable ductless air conditioning services below and let us know how we can help.

A mini split installation lets you create separate cooling zones throughout your home without adding ductwork. The system connects one outdoor unit to indoor air handlers using a refrigerant line that runs through a small hole in the wall. Each indoor unit controls its own space with a remote control, so you’re not wasting energy cooling rooms you aren’t using. Most units are typically mounted on the wall, but some can be installed in the ceiling depending on the layout.

They work especially well in San Diego homes for guest rooms, converted garages, garage apartments, additions, offices, and older houses where a ducted system can be difficult to install. Compared to window units, they’re quieter, more efficient, and do a much better job keeping rooms comfortable year-round.

Mini split maintenance helps your system keep up with daily heating and cooling without losing performance over time. During service, the indoor air handlers, filters, coils, drain lines, and outdoor units are cleaned and inspected to keep the air conditioning system running properly. Refrigerant levels, airflow, electrical parts, and system controls are also checked to catch small problems before they turn into expensive repairs. 

Regular maintenance helps your mini split AC system deliver more efficient cooling, better airflow, and more consistent temperatures from room to room. It can also help lower energy use and reduce wear on important components. If you want your home heating and cooling system to last longer and run more reliably, yearly maintenance has a huge impact.

In San Diego, a ductless heat pump works well year-round since it can cool your home during warm weather and provide heat when temperatures drop at night. A mini split air conditioner also does a great job handling our long stretches of 70-, 80-, and even 90-degree weather. Even though most ductless mini splits last around 15 to 20 years, there comes a point when repairs add up and performance starts slipping. 

If your system is struggling, we install trusted brands like Mitsubishi Electric and Daikin with newer models that are quieter, more efficient, and better at controlling temperatures from room to room. We’ll help you find the right mini split replacement and get everything installed quickly.

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 back in 2005 with a couple of trucks, a small team, and a simple way of doing business: treat people right, do solid work, and stand behind it. A lot has changed since then, but that part hasn’t. We’re still family-owned, still focused on honest service, and still the kind of company that believes good work speaks for itself.

We also believe great service starts with the people doing the work. That’s why we invest in our technicians with training, support, and the right tools so they can take their time and do things properly. No rushed jobs. No pushy sales talk. Here’s more of what you can expect from our local San Diego ductless mini split service company:

  • 100% Customer Satisfaction Guarantee: If something’s wrong, we’ll make it right.
  • Upfront, Honest Pricing: We explain the cost clearly before any work begins.
  • Expert Technicians: Our NATE-certified technicians have advanced certification.
  • 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: We’ll come out and provide all of the pricing upfront.
  • 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.

If you want to see what ductless heating and cooling can do for your home, we’d love to help you get started. And if your current ductless split system needs service, just give us a call or schedule online—we’ll take good care of you.

Frequently Asked Questions

Absolutely. A ductless air conditioner is one of the easiest ways to get comfortable cooling without tearing into your house for ductwork. They’re quiet, efficient, and great at delivering conditioned air right where you need it. A lot of San Diego homeowners love them because they help keep energy consumption lower while giving each room its own temperature control.

The biggest drawback is usually the upfront price, especially if you want multiple zones throughout the house. Some homeowners also need time to get used to seeing the indoor wall units instead of hidden vents. But once the system is up and running, most people end up loving the comfort and lower energy costs.

Not at all. Some homeowners use a home ductless air conditioner setup for just one problem area, while others build out multiple zones across the house. It really depends on how you use the space and where you want better airflow.

A ductless cooling system gives you room-by-room control without relying on ductwork hidden behind walls and ceilings. Because it’s a duct-free air system, you don’t lose cooled air through old or leaking ducts like you can with some central systems. Installation is usually cleaner and faster than putting in a full split-system air conditioner, and the systems are known for running quietly.

The cost of ductless air conditioning depends on how many zones you want, the size of the space, and the type of equipment you choose. A single-room setup will cost less than a larger multi-zone cooling system for the whole house. We’ll take a look at your space and give you clear pricing before anything moves forward.

Not at all. Most ductless systems just need basic yearly maintenance to keep everything running smoothly. Cleaning the filters, checking the indoor and outdoor units, and making sure airflow stays strong can go a long way. A little upkeep now helps prevent bigger repairs later and keeps your system cooling the way it should.

Heating and Cooling Offers You Can't Miss

Big savings, same great service. See what offers are available now 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 7/31/2026.

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 7/31/2026.

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 7/31/2026.

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 7/31/2026.

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

At Guthrie & Sons Heating, Air & Solar, we help homeowners find the best ductless air conditioner for their space, layout, and budget. Our licensed and insured technicians know these systems inside and out, and we take the time to make sure everything is installed and running properly. Whether you need repairs, maintenance, or help planning for the future, we’re here to help you decide what works best for your home. 

We provide ductless heating and cooling services throughout San Diego, including Mira Mesa, Clairemont, Rancho Bernardo, Pacific Beach, and nearby neighborhoods. Give us a call or use our website to schedule service today.