San Carlos, CA homeowners, consider Plum HVAC your reliable, full-service partner for everything from new installations to necessary repairs and seasonal maintenance for your furnaces, air conditioners, heat pumps, and ductwork. Our team emphasizes what really matters: proper system sizing, corrosion resistance to tackle our coastal environment, and outstanding energy efficiency. We make sure you get thorough assessments, clear, itemized estimates, help with permitting, precise installations, and solid post-installation warranties. Plum HVAC doesn't just focus on comfort; we prioritize your indoor air quality, offer smart zoning options, and encourage proactive maintenance. This approach prevents those inconvenient breakdowns, helps lower your energy costs, and ensures your home stays comfortable and healthy throughout the year. Our trusted technicians are here to guide you, from that very first assessment to ongoing care, providing dependable support every step of the way.

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(650) 605 – 5986

HVAC Company in San Carlos, CA

Maintaining year-round comfort in San Carlos, CA requires balancing the area’s mild Mediterranean climate, occasional marine influences, and California energy regulations. Plum HVAC, a full-service local HVAC company, provides the services homeowners need to keep their systems running efficiently. We address common HVAC issues, deliver professional installations and maintenance, and protect your investment through accurate system sizing, thorough testing, and reliable post-installation support. From initial assessment to ongoing care, Plum HVAC ensures San Carlos homeowners enjoy consistent comfort, energy efficiency, and peace of mind.

Why professional HVAC service matters in San Carlos

San Carlos experiences warm, dry summers and cool, wet winters with occasional humidity and coastal air that can accelerate corrosion on outdoor equipment. Proper system sizing, high-efficiency equipment selection, corrosion-resistant materials, and routine seasonal maintenance are critical to achieving reliable comfort and keeping energy bills manageable under California utility and efficiency standards. Addressing small issues early prevents expensive breakdowns during peak use.

Common HVAC issues in San Carlos homes

Uneven temperatures or rooms that never reach setpoints
Frequent cycling, short cycling, or loss of cooling capacity in summer
Reduced furnace or heat pump efficiency as seasons change
Noisy ductwork or airflow restrictions
High humidity or poor indoor air quality during certain seasons
Corrosion or premature outdoor unit failure from marine-influenced air
Thermostat or zoning malfunctions that prevent proper control

Understanding the cause of these symptoms helps determine whether repair, targeted upgrades, or full system replacement is the right choice.

Core services offered

Furnace and air conditioning installation, repair, and seasonal maintenance
Full diagnostics, safe repairs, and preventive tune-ups to restore performance and extend equipment life.
Annual maintenance plans to cover pre-summer A/C checks and pre-winter furnace checks.
Heat pump and ductless mini-split systems
High-efficiency alternatives ideal for California’s climate, offering both heating and cooling with lower energy use.
Ductless mini-splits for room additions, historic homes, or targeted comfort without ductwork.
Ductwork design, repair, and balancing
Custom duct sizing, sealing, and insulation to prevent energy loss and resolve uneven airflow problems.
Thermostat and zoning systems
Smart and programmable thermostat installation and multi-zone solutions to improve comfort control and reduce wasted energy.
Indoor air quality (IAQ) solutions
Air filtration upgrades, UV germicidal options, humidity control, and ventilation solutions to improve health and comfort inside your home.

Typical diagnostic and project process

1. Home assessment and load calculation

A qualified technician evaluates your home’s layout, insulation, windows, occupancy patterns, and local climate effects to perform a heating and cooling load calculation. This ensures correct equipment sizing.

2. Recommendations and written estimate

Receive a clear, itemized scope describing recommended repairs or replacement options, equipment efficiency ratings, anticipated timelines, and permit requirements. Estimates explain trade-offs between upfront cost, operating efficiency, and anticipated life span.

3. Permitting and inspection support

Projects that require permits are planned to meet San Mateo County and City of San Carlos codes. Documentation and inspection coordination are provided to ensure compliance.

4. Installation and workmanship

Installations follow industry best practices: correct refrigerant charge, proper airflow setup, secure duct connections, and electrical compliance. For outdoor units, corrosion-resistant mounts and clearances are prioritized in marine-influenced areas.

5. System startup and testing

Post-install testing includes airflow verification, temperature split checks, thermostat calibration, and system safety testing. Performance metrics are reviewed so the system meets design expectations.

6. Rebates and efficiency incentive support

Guidance is provided on available state and local energy-efficiency rebates and how to submit required documentation to maximize financial incentives.

7. Post-install support and warranty handling

Information on manufacturer warranties and workmanship coverage is provided at handoff. Support includes assistance with warranty claims and recommended maintenance schedules.

Licensing, insurance, and warranty information

Licensed and insured HVAC work protects homeowners and ensures work meets regulatory standards. Projects follow California contractor licensing requirements and local permitting processes. Installed equipment carries manufacturer warranties for parts and compressors; workmanship warranties cover installation labor for a defined period. Documentation outlining both manufacturer and labor warranties is provided with every job so homeowners understand coverage and claim procedures.

COVID-19 safety practices

Safety procedures are adapted to protect homeowners and technicians. Typical measures include:

Pre-visit screening and appointment coordination to minimize contact
Use of personal protective equipment (PPE) and hand hygiene
Minimizing time spent inside occupied spaces when possible and following distancing guidelines
Surface disinfecting of work areas and tools after service
Remote consultation options for initial estimates and follow-up when appropriate

These steps help maintain safe service delivery while ensuring essential HVAC work continues.

Pricing and quote options

Transparent pricing starts with an on-site assessment or remote pre-screen to define scope and equipment needs. Estimates are written and itemized so you can compare options such as equipment efficiency levels, extended warranties, or financing choices. For many projects, multiple equipment and system configurations are offered to match performance goals and budget considerations. Pricing models typically account for equipment, installation labor, permit fees, and any required duct or electrical upgrades.

Benefits of timely action and simple maintenance tips

Investing in the right HVAC solution and regular maintenance delivers:

Improved comfort and consistent temperatures throughout the home
Lower energy bills through efficient equipment and properly sealed ductwork
Fewer emergency repairs and extended equipment life
Better indoor air quality and reduced allergens

Simple homeowner maintenance to prolong system life:

Replace or clean filters regularly (every 1-3 months depending on type and use)
Keep outdoor units free of debris and ensure good airflow around the condenser
Keep vents and registers unobstructed and balanced per room needs
Schedule seasonal professional tune-ups for optimal performance

Choosing a full-service HVAC partner means getting professional assessment, code-compliant installations, and ongoing support tailored to San Carlos conditions like coastal-influenced corrosion risk and California energy rules. Proper sizing, quality workmanship, and planned maintenance reduce lifecycle costs and improve comfort. Detailed estimates, transparent warranties, and inspection support are part of a responsible approach to upgrading or maintaining your home’s heating and cooling systems.

testimonials

hear what our satisfied clients have to say

5.0

We found Plum HVAC in 2024 after spending more than 2 months searching and comparing estimates. The owner Sam gave us a very competitive price for a Mitsubishi mini-split and the installation went off without a hitch. Our experience was so positive that we later requested their services twice more to also install A/Cs for our 2 other rooms. Their technician, Jake, led our installations each time and we were very impressed by their professionalism and quality of work. Now 1 year in and we could not be any happier, nor have we encountered any issues with our models.

Jesse Y.

5.0

Sam of Plum HVAC, responded to our Heat Pump installation request promptly and provided a very competitive estimate after an onsite visit. He was very flexible and patient to answer and explain our questions. After we signed the contract, he and his team of 4 worked very hard to deliver and install the whole Heat Pump system on time with good quality. I am particularly impressed by their problem solving skills to overcome different connection challenges for the attic installation. Each day before they started, they covered the floors with protection blankets and cleaned after they were done for the day. They also revised the drainage and electric work per the city inspection guidance. Sam and his team were professional and honest so we highly recommend Plum HVAC to any customers who need HVAC work done for their houses.

Chunshi C.

5.0

We needed to install a mini-split in a backyard unit. Sam and his team helped with this, and they did a fantastic job. Sam visited our place and clearly explained to me what needed to be done, and offered a great price. He scheduled the job for a few days later, and his team performed the job with extraordinary quality. Later, I noticed a minor issue and reached out to them. Sam helped me to fix the issue on a second visit by his team later in the week, providing top-notch customer service. I will work with them in the future for my HVAC jobs, and highly recommend them given their excellent work quality and customer service.

Majid J.

5.0

I reached out to 4 companies for mini split quotes; Plum HVAC pricing came in the lowest. Beyond that, Sam was very knowledgeable and kind during the in home consultation. He offered a quote in person, & stuck by it. They removed our old furnace, and installed a two head mini split in our two story townhouse. The work as you can see is very clean! The guys who installed it were very fun & professional. Sam & his team were communicative the whole way through including the permitting process. They took roughly one full day for install, which was very fast! Including removal & disposal of our old furnace. Natalie was very helpful throughout the Bayren Rebate process & always available for any questions! This system has changed our lives, wish we would have gotten it done sooner! It’s way better than we could have imagined.

Bobby R.

5.0

Plum HVAC exceeded my expectations in every way. Sam and his installer team were not only professional but also incredibly responsible throughout the entire process. They provided top-notch service at a very reasonable price, which is hard to come by these days. I highly recommend Plum HVAC to anyone looking for quality HVAC services. You won't be disappointed!

A Chui

5.0

I recently engaged Plum HVAC to install two mini-split units at my residence, and I'm thrilled with the outcome.Throughout the entire process, from the initial consultation to the project's completion, Plum HVAC showcased professionalism and expertise. The technician, Sam, arrived promptly and conducted a comprehensive assessment of my HVAC system. Sam took the time to thoroughly explain the technicians' tasks, the estimated duration of the project, and provided transparent pricing options.

Romero J.

5.0

Wonderful experience with Plum HVAC on a heat pump installation! I checked several companies, compared their recommendations, timelines, reputations and prices.Sam, the owner, was very professional and has almost 2 decades of experience in HVAC. When I asked dumb questions, he answered most graciously. And when I noted that some companies we queried said we could get away WITHOUT replacing our original ductwork from 1965, he gave us his honest opinion why that wasn't a good idea. (Hubby remembered later that people who worked in our attic adding insulation told us there were lots of duct leaks.)

Marlene S.

5.0

I called 8 different HVAC companies for quotes for a heat pump heating/ac system because I want to save money by switching from a forced air gas furnace to an electric heat pump system which will give me both heating and air conditioning. In addition my old furnace (circa 1991) was way oversized for my home and the air coming out too noisy. The New heat pump system is quieter and more efficient. Back to the quotes for the system, all the other 7 companies sent a salesperson/advisor to give the quote. Sam, the owner of Plum HVAC came our to give the quote. He was quick with his quote and was very knowledgeable. He didn't try to upsell me on anything and have the lowest quote of them all. His price was 60% less than the highest quote and 15% lower than the next second lowest quote.

Michael C.

5.0

Plum HVAC is an extremely professional, knowledgeable, and an established company to hire. I highly recommend Plum HVAC! Sam and his crew did a wonderful job. Sam worked with my schedule and his crew had completed the job with ease.

Blake

5.0

Sam was one of the most professional business owners I had the chance to meet over the past few years and I'm so happy I trusted him to install our new A/C unit.- He showed up on time- He was transparent (and reasonable) regarding pricing- He offered 2-3 options- His crew did a very clean/thorough jobWhat I loved the most though, was the fact he was very easy to communicate with. I would definitely use him again and recommend him to our neighbors/friends.

Bruno L.

5.0

We recently had a complicated Bryant Evolution dual fuel system with variable speed and zoning installed in our home by Plum HVAC, and we are very pleased! The team also changed the entire crawl space ducting, ensuring a comprehensive upgrade. The price was fair, and the team was always on time and easy to contact. Sam Mousavi, the head of the team, paid great attention to detail and demonstrated a strong understanding of systems. His expertise in HVAC systems and his friendly character made us feel comfortable throughout the process. We highly recommend Plum HVAC for their professionalism and excellent service.

Amirali B.

5.0

I cannot say enough about Plum HVAC, who replaced my aging heater furnace, and in particular Sam. Sam was very highly recommended by my sister, who replaced her furnace and added air conditioning.First, they gave me a good deal for a 2-stage, at the same cost as the lowest bid for a 1-stage. The other bids were dancing around some gas line work made by previous owners.

Kumar S.

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