For homeowners in Daly City, Plum HVAC offers comprehensive HVAC solutions, covering everything from new installations and replacements to essential repairs and ongoing maintenance for your furnaces, air conditioners, heat pumps, and ductless systems. Every project we undertake starts with a thorough site assessment, ensuring proper system sizing and expert duct sealing. We also offer great options like smart thermostats, effective zoning solutions, and indoor air quality upgrades specifically designed to handle coastal conditions. Our main goal is to deliver energy efficiency, unwavering safety, and long-term reliability for your home. You'll benefit from our clear pricing, straightforward warranty guidance, and neighborhood-specific recommendations. This local expertise from Plum HVAC helps minimize downtime, significantly reduce energy costs, and extend the life of your equipment through truly trusted, local craftsmanship.

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(650) 605 – 5986

HVAC Company in Daly City, CA

Keeping your home comfortable year-round in Daly City means dealing with coastal fog, high humidity on some days, salt air exposure, and a mix of older and modern construction. As a full-service HVAC company in Daly City, CA, we handle installation, replacement, repair, and maintenance for furnaces, air conditioners, heat pumps, and ductless mini-splits, plus ductwork, thermostats and zoning systems, and indoor air quality equipment. This page explains what to expect, common local issues, the service process, warranty and rebate assistance, COVID-19 safety measures, and practical tips to improve efficiency and system life.

Why professional HVAC service matters in Daly City

Daly City homes face unique conditions: the marine layer and salt air can accelerate corrosion on outdoor equipment, while cooler summers and mild winters make heat pump and ductless systems particularly cost-effective. Older houses often have undersized or leaky ductwork, and moisture in coastal neighborhoods can create mold or indoor air quality concerns. Professional HVAC service tailored to these conditions prevents recurring breakdowns, improves comfort, and lowers energy use.

Our core HVAC offerings

System installation and replacement: Furnaces, central AC, heat pumps, and ductless mini-splits sized for your home and lifestyle.
Repair and diagnostics: Fast troubleshooting for intermittent failures, refrigerant issues, compressor and fan problems, ignition or pilot issues, and airflow or duct leaks.
Seasonal maintenance and tune-ups: Fall heating checks and spring cooling tune-ups to maximize performance and avoid emergency calls.
Ductwork services: Repair, sealing, insulation, and design improvements to reduce leaks and balance airflow.
Thermostat and zoning systems: Smart thermostats, multi-zone controls, and zoning dampers for better comfort and energy savings.
Indoor air quality: HEPA filtration, UV germicidal lights, ERV/HRV ventilation systems, whole-home humidifiers and dehumidifiers.

Common HVAC issues in Daly City homes

Corrosion and outdoor unit wear from salt air
Reduced efficiency due to leaky or poorly insulated ducts in older homes
Frequent cycling or short-cycling in improperly sized systems
Excess humidity or mold growth in basements, crawlspaces, and poorly ventilated rooms
Thermostat inaccuracy or poor zoning for multi-level homes
Uneven heating and cooling due to inadequate airflow or blocked return vents

The service process — what to expect

Site assessment
A technician inspects your property, evaluates current equipment, measures rooms and insulation, and checks ductwork. For replacements, we use industry-standard load calculations to match system capacity to your home’s needs.
System sizing and selection
Proper sizing prevents short cycling, poor dehumidification, and premature wear. We explain the differences between options—high-efficiency heat pumps vs. traditional furnaces, ducted vs. ductless solutions—and how each performs in Daly City’s climate.
Professional installation
Installations follow manufacturer guidelines and local code. For replacements, we address duct sealing, refrigerant line routing, and electrical connections. For ductless systems, we plan placement to maximize comfort and visual impact.
Diagnostic repairs
For repair visits, we perform step-by-step diagnostics: electrical checks, refrigerant pressure and leak detection, combustion safety for gas systems, and airflow measurement. Repairs include component replacement, refrigerant service, motor or blower repairs, and control system updates.
Seasonal tune-ups
Tune-ups include filter changes, lubrication, safety checks, electrical tightening, calibration, and performance testing to restore factory-like efficiency.

Warranty and rebate assistance

We guide homeowners through manufacturer warranties and help document eligible repairs or replacements to protect your investment. Daly City residents may qualify for utility or state incentives for efficient equipment—assistance includes verifying program eligibility, completing required paperwork, and ensuring installations meet rebate conditions.

Pricing and quote transparency

Estimates begin with a no-surprise assessment and include a written scope of work, equipment options, efficiency ratings, and expected timelines. Quotes explain the lifetime value of higher-efficiency systems rather than focusing only on upfront cost, helping you weigh energy savings and potential rebate benefits.

COVID-19 safety precautions

Technicians follow updated safety protocols to minimize exposure risk: wearing masks and gloves, practicing social distancing during assessments, using contactless documentation when possible, sanitizing tools and work areas, and offering flexible appointment options to reduce time on site. Indoor air quality upgrades like upgraded filtration and ventilation can further reduce airborne contaminants.

Energy efficiency and system care tips for Daly City homes

Replace basic filters monthly; use MERV-rated filters compatible with your system for better air quality.
Schedule tune-ups twice a year: one before cooling season and one before heating season.
Seal and insulate ductwork in attics and crawlspaces to prevent energy loss.
Consider a smart thermostat or zoning to reduce energy use in unoccupied rooms and nights.
For homes with salt exposure, inspect outdoor units periodically for corrosion and rinse gently as recommended.
If your house lacks ducts or has difficult rooms, ductless mini-splits provide targeted comfort with high efficiency.

Long-term benefits of professional HVAC care

Regular, professional HVAC service in Daly City improves indoor comfort, reduces emergency repairs, extends equipment life, and lowers energy bills. Addressing local issues like duct leaks, humidity control, and salt-related wear early prevents costly failures and maintains healthy indoor air.

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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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