Expert Heating Installation in San Marcos with Guaranteed Workmanship

Ensuring Warmth & Comfort for Every Home

When the winter chill sets in, having a reliable heating system isn’t just a luxury—it’s a necessity. At Oasis Heating & Air Conditioning, we understand the pivotal role a warm home plays in your family’s comfort. With decades of expertise under our belt, we’ve cemented our position as one of the top HVAC contractors in San Marcos.

Our skilled technicians are not just trained—they’re continuously updated with the latest in heating and furnace technology. Whether you’re considering a gas furnace installation, general heater installation, or exploring energy-efficient options, we’ve got the knowledge and tools to ensure the job’s done right.

But our services don’t just end at the installation. We offer an array of heating solutions tailored to the diverse needs of homeowners throughout San Marcos and the wider county. Every furnace or heating system we install is meticulously chosen based on your home’s unique specifications and your personal preferences.

Your peace of mind is paramount to us. That’s why we don’t just promise quality—we guarantee it. All our heating services, from furnace installation to routine maintenance checks, come with extended warranties on equipment and labor. We pride ourselves on transparent pricing, professional services, and an unwavering commitment to your satisfaction.

So, when you think of heating services in San Marcos, CA, think Oasis. We’re here to keep you warm, no matter how cold it gets outside.

Comprehensive Heating Solutions Tailored to Your Home

Deciding on the ideal heating system for your home can be daunting, especially with numerous options available in today’s market. Whether you aim to upgrade your living space with a contemporary, energy-efficient heater, replace a dated and inefficient system, or you’re just venturing into the realm of indoor heating, we’re the trusted choice for heater installations that are executed promptly and professionally.

Our seasoned team possesses an expansive knowledge base, encompassing an array of heating systems, ensuring your home gets the most suited fit. We specialize in:

  • Gas Furnaces: Renowned for their efficiency and longevity, these are among the most popular choices for homeowners.
  • Heat Pumps: These versatile systems can both heat and cool your home, offering year-round comfort.
  • Custom Heaters: For those unique spaces or specific needs, we offer tailored heating solutions designed with you in mind.
  • Electric Furnaces: An alternative to gas, these furnaces can be ideal for homes without access to natural gas.
  • Ductless Systems: Perfect for homes without ductwork or for specific zones in your home, offering flexibility and efficiency.
Stay Cozy with Oasis

Navigating the heating landscape can seem complex. If you’re uncertain about your current heating system or overwhelmed by the choices for a new one, we’re here to assist. Let us simplify the process for you. Schedule an in-home consultation with our furnace installation specialists. They’ll guide you through the options, ensuring the selected system aligns with your comfort needs, the spatial requirements of your home, and your budgetary considerations.

Signs It’s Time to Replace Your HVAC System

Age: Like any mechanical system, it will fail overtime.

High Energy Bills: Older models are less efficient & will lose efficiency as they get older.

Frequent Repairs: Repairs aren’t uncommon, but if they are required often, the system is likely at the end of its lifespan.

Frequently Asked Questions

What makes Oasis Heating & Air Conditioning the go-to choice for furnace installation in San Marcos?

We’re not just experts, we’re also your neighbors! With years of hands-on experience and a commitment to the San Marcos community, we ensure top-tier services and real relationships with our clients.

Everyone's talking about ductless systems. What are they?

Ductless heating, often called mini-splits, offers targeted heating without the need for extensive ductwork. It’s a sleek and efficient option, especially for homes with unique layouts or room-specific heating needs.

I'm on the fence: electric furnace or gas furnace?

Each has its distinct advantages! Heat pumps are versatile, providing both heating and cooling, and are typically more energy-efficient in milder climates. Gas furnaces heat up faster and can be more cost-effective in regions where gas prices are low. Let’s discuss your specific needs to help you pick the right option for your home!

It's my first time considering a furnace. Can you guide me?

Of course! Picking the right furnace is crucial, and we’re here to walk you through every step. We’ll evaluate your space, discuss your needs, and recommend the best options within your budget.

Trusted HVAC & Plumbing Excellence in San Marcos: Experience the Oasis Advantage

100% Satisfaction Guarantee

Providing top-tier HVAC & plumbing services is our standard. With warranties that exceed the usual industry standards for both equipment and labor, our utmost priority is to ensure your complete satisfaction with every project.

Experienced & Knowledgeable

Boasting over three decades in the HVAC & plumbing fields, our team delivers unparalleled expertise to every task. Our commitment to ongoing training and learning guarantees state-of-the-art solutions and premier service for all your home comfort needs.

Fair, Upfront Pricing

Marrying excellent AC, heating & plumbing expertise with clear, upfront pricing is our pledge. You can anticipate competitive rates without any unexpected costs or hidden charges, and our install and replacement estimates will always be free!


We firmly believe that everyone deserves optimal indoor comfort, regardless of budget constraints. Explore our flexible financing options to ensure home comfort without the financial stress.

Above and Beyond Factor

Our dedication to excellence is not just about systems and solutions. It is about the relationships we build. Every interaction, big or small, is valued. We strive to ensure that everyone—whether a loyal customer or a first-time inquirer—feels the depth of dedication and expertise our team brings.

Give Us a Call! Or Let Us Contact You!
(619) 626-2499

    Ready to Get Started?

    Schedule Appointment

    Contact us to schedule your in-home free consultation.


    Home Evaluation & Customized Plan

    We will help you to determine the best system for your home based on your needs, space, and budget.


    Install & Execute

    Our team will install the system of your choice and ensure it works perfectly.

    Don’t Listen to Us.
    Listen to Our Past Clients.

    Vinny B
    Vinny B
    Can't say enough good about this company. They worked with me on price and they offered a labor warranty much longer than the other companies. They are masters at the craft to as they addressed all the old issues I had with the system that was replaced. The new system is working great. They replaced both my heater and air conditioner and did it all in a day. Appreciated the follow up to see how everything is going as well. Get a quote from Oasis for any hvac project. I'm glad I did.
    Paloma Santiago
    Paloma Santiago
    This review is long overdue but I have had time to enjoy our new ac and heater that Oasis heating and air conditioning installed a few months ago. We saw one of their ads on Facebook and requested someone to contact us. We contacted a few companies from ads we saw. Oasis immediately stuck out to us because the gentleman who came showed us their license card when we came to the door. None of the other companies did that so it was different but it was also reassuring since we knew we were making a big investment in our home. One of the issues with our previous system was the poor air flow in our master bedroom. Michael was the only one to recommend increasing the vent to help. Instead of just giving us a quote really quick we could tell he listened to what we talked about and was really trying to fix the issues we had with the old system. They weren’t the lowest bid although close but they were nowhere close to the highest either. Overall we felt most comfortable with Oasis. The install was completed in two days and we have used our ac on many occasions since and weak airflow is fixed. I also tested out the furnace the other morning for the first time too. We are thankful to have found this company and have recommended them to a few other friends and family.
    Beata Zabnicka
    Beata Zabnicka
    Response time is great and very professional!
    Armando Acuna
    Armando Acuna
    Oasis was able to come out for an estimate the same day that I found them on Google. The guy who came out was here longer than some of the other companies sales people and he explained that they try to do as thorough of an inspection as possible when providing an estimate. He went into the attic to check out my old system while some others didn’t. Given the amount of time he dedicated just for a free estimate I was expecting the price to be high. It was quite the opposite and more competitive than most. It wasn’t the lowest but they quoted me the brand I mentioned and most of all I felt confident they would do good work given the effort they put into the estimate. The install was schedule and completed a few days later and everything is working perfectly. The house cools really quick and the system very quiet. I recommended them to a friend already and am glad I found them.
    K G
    K G
    I have been needing to upgrade my home air conditioning system for the past few years and have been putting it off. Instead of doing a repair this year I decided to get a whole new system. I interviewed several companies and decided on Oasis. I was somewhat nervous since they are a new company but that quickly went away. They communicated well, finished the job on time and showed me how to use the thermostat. Also they tested the system afterward while they cleaned up to make sure everything worked. I’m happy I gave them the chance. :)
    michael hurtado
    michael hurtado
    I found Oasis when looking up someone to replace my AC. They were able to give me an estimate that same day and then install everything even that same week. Everything is working perfectly. Appreciate them being so fast so I could stay cool during the heat wave.
    Josh Sotelo
    Josh Sotelo
    Got in touch with oasis when my ac unit suddenly went out. They showed up within a few hours and fixed the issue. Unit is still working and price was reasonable. Give them a call if you need help.