Our Millbrae HVAC team at Plum HVAC is proud to provide expert heating, cooling, and indoor air quality solutions for both homes and businesses, offering reliable installation, replacement, repair, and maintenance services. Each project begins with a detailed assessment and a transparent service plan, ensuring your system is perfectly sized and optimized for Millbrae’s unique coastal climate. We're skilled at addressing common local HVAC issues and offer ongoing maintenance programs specifically designed to boost efficiency and extend your system's lifespan. Our technicians adhere to strict safety and code-compliance standards, and we're here to assist with permits, warranties, rebates, and available financing options. Whether you need a brand-new installation, a system upgrade, or routine seasonal maintenance, Plum HVAC is focused on delivering lasting comfort, improved air quality, and lower energy costs—keeping your indoor environment efficient and dependable throughout the year.

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(650) 605 – 5986

HVAC Company in Millbrae, CA

Plum HVAC provides full-service heating, ventilation, and air conditioning solutions for Millbrae, CA homeowners and businesses. With experience across installation, replacement, repair, and routine maintenance, Plum HVAC handles furnaces, central air systems, heat pumps, ductless mini-splits, ductwork, thermostats, zoning systems, and indoor air quality equipment. In Millbrae’s mild coastal climate — where fog, salt air, and temperature swings between morning fog and sunny afternoons can stress HVAC systems — properly sized, installed, and maintained equipment translates to greater comfort, lower energy bills, and longer equipment life.

Common HVAC issues in Millbrae and the services that fix them

Many Millbrae homes face the same recurring problems due to regional conditions and housing stock age. Typical issues Plum HVAC resolves:

Insufficient cooling on warm afternoons despite normal thermostat settings — often caused by undersized systems, refrigerant issues, or poor duct airflow.
Uneven temperatures between rooms — frequently due to duct leaks, lack of zoning, or incorrect system sizing.
Corrosion and premature component failure in coastal properties — salt air can accelerate wear on outdoor units and electrical connections.
Short cycling and frequent on/off cycles — usually linked to bad thermostats, improper sizing, or failing compressors.
Stale indoor air, dust accumulation, or humidity concerns — addressed with filtration upgrades, UV air purifiers, and balanced ventilation.

Services offered:

System assessment and professional system sizing for accurate load calculations
Furnace and air conditioner installation and replacement
Heat pump and ductless mini-split supply and installation
Ductwork repair, sealing, and redesign
Thermostat upgrades, smart controls, and zoning systems
Indoor air quality solutions: filtration, humidification, dehumidification, and UV options
Emergency and routine repairs

The Plum HVAC service process in Millbrae

A reliable installation or repair begins with a methodical process that protects performance, safety, and energy compliance.

Assessment and diagnostics

Comprehensive walkthrough of your home or building to identify comfort goals, existing system condition, and ventilation needs.
Load calculation and system sizing using industry-standard methods to match equipment capacity with actual heating and cooling requirements.

2. Proposal and options

Clear comparison of appropriate system types (furnace, air conditioner, heat pump, or ductless options) with expected efficiency, lifecycle, and indoor air quality benefits.
Explanation of zoning, controls, and ductwork modifications where applicable.

3. Professional installation or replacement

Removal of old equipment with minimal disruption and responsible disposal.
Precise installation following manufacturer specifications: electrical, refrigerant handling, duct transitions, condensate management, and protective measures against coastal corrosion.
Coordination with HERS or other energy raters when required by local code or for incentives.

4. Testing, balancing, and commissioning

System start-up, refrigerant verification, airflow measurement, and thermostat calibration.
Duct sealing verification and airflow balancing so every room meets comfort targets.
Documentation of performance and handoff instructions for operation and maintenance.

Installation and replacement considerations for Millbrae homes

Correct sizing matters: undersized systems struggle on warmer days; oversized systems short cycle and reduce humidity control.
Heat pumps are an excellent choice for Millbrae’s moderate climate, offering efficient heating and cooling in one unit.
Ductless mini-splits provide targeted comfort for additions, older homes without ducts, and rooms with unique load conditions.
Coastal exposure requires corrosion-resistant components and regular inspection of outdoor units.
Permitting and HERS coordination are common in local projects; Plum HVAC assists with local permit paperwork and energy rating coordination.

Maintenance programs and tune-up checklist

Regular maintenance keeps systems efficient, prevents breakdowns, and preserves warranties. Typical maintenance program features:

Seasonal tune-ups scheduled for spring and fall
Priority service windows and maintenance reminders
Filter replacement guidance and filter delivery options
Inspection reports with recommended actions and estimated remaining life

Standard tune-up checklist:

Visual inspection of system and cabinet integrity
Clean and inspect outdoor condenser or heat pump coil
Check refrigerant levels and electrical connections
Clean or replace air filters and inspect indoor coil
Test thermostat accuracy and control systems
Check furnace burners, ignition, and heat exchanger for safety
Inspect condensate drain and pans for proper flow and algae buildup
Verify airflow and measure static pressure when needed
Lubricate moving parts where applicable

Warranties, rebates, and permit assistance

Plum HVAC emphasizes equipment backed by manufacturer warranties and provides workmanship guarantees for installations and repairs. For Millbrae projects, Plum HVAC helps identify local and state energy efficiency incentives, assist with documentation required to claim rebates, and manage the permit process with city building departments. Coordination for HERS verification or energy compliance testing can be included where required to secure rebates or satisfy local code requirements.

Pricing and financing options

Transparent pricing begins with an on-site assessment and written estimate that outlines the recommended scope, equipment options, and anticipated timeline. While specific pricing varies by system type and home requirements, Plum HVAC can explain typical cost drivers — equipment efficiency, ductwork needs, electrical upgrades, and permitting — and outline available financing options designed to spread project costs over time. This helps homeowners make informed decisions that align with budget and long-term energy savings goals.

COVID-19 safety and healthy-air practices

Recognizing ongoing concerns about indoor air quality and safety, Plum HVAC implements enhanced hygiene protocols during service visits. Technicians follow personal protective measures, maintain social distancing where feasible, minimize time inside occupied spaces, and sanitize work areas and touchpoints after service. Beyond immediate safety, solutions like higher-efficiency filtration, increased ventilation, and UV germicidal options can further reduce airborne contaminants inside Millbrae homes.

Long-term benefits of professional HVAC care in Millbrae

Investing in professional HVAC installation and scheduled maintenance delivers measurable benefits:

Improved year-round comfort, even with Millbrae’s coastal microclimates
Lower energy use and more predictable utility bills
Fewer emergency repairs and extended equipment life
Better indoor air quality for families and occupants
Compliance with local permitting and energy standards, protecting resale value

Plum HVAC positions itself as a full-service partner for Millbrae residents seeking reliable, code-compliant HVAC performance, from precise system sizing to ongoing maintenance and rebate coordination. Detailed assessments, professional installations, and documented tune-ups ensure systems run safely and efficiently in Millbrae’s coastal environment.

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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