Sunnyvale homeowners can count on Plum HVAC for expert installation, repair, and indoor air quality solutions designed for our region’s mild California climate. Each service we provide begins with a detailed system assessment and precise Manual J/D sizing to ensure optimal performance and efficiency. Our specialists offer energy-efficient equipment options, ductwork design and optimization, zoning systems, and smart thermostat installations—all aimed at delivering customized comfort for every home. We also provide preventative maintenance plans, warranty assistance, rebate guidance, and help with local permitting to simplify the process from start to finish. With a strong focus on safety, code compliance, and prompt service, our local Plum HVAC team ensures dependable comfort, lower energy costs, and improved air quality through both hot summers and cool winters.

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(650) 605 – 5986

HVAC Company in Sunnyvale, CA

Keeping your home comfortable and healthy in Sunnyvale means selecting the right HVAC solutions for our mild Mediterranean climate, occasional heat waves, and seasonal wildfire smoke. Whether you need air conditioning installation, heat pump conversion, ductwork repair, or enhanced indoor air quality, a local HVAC company that understands Sunnyvale homes and permitting requirements delivers better performance, long-term savings, and peace of mind.

Common HVAC problems in Sunnyvale homes

Air conditioning short-cycling or weak cooling during summer heat spikes
Inefficient heating or noisy older furnaces and heat pumps during cool nights
Uneven temperatures from poor duct design or leaky ducts in older homes
Indoor air quality issues from wildfire smoke, pollen, or household contaminants
Rising energy bills due to aging equipment or suboptimal thermostat settings
Need for ductless mini-splits or heat pump solutions for retrofit projects

Full range of services

Our approach covers the full lifecycle of home comfort systems so you can choose the right equipment and keep it operating efficiently:

System assessment, sizing, and replacement planning for AC, furnace, heat pump, and ductless mini-split systems
Installation of energy-efficient central AC, heat pumps, furnaces, and mini-splits including commissioning and performance testing
Repair and diagnostics for compressors, motors, capacitors, refrigerant leaks, blower motors, thermostats, and zoning controls
Ductwork services: sealing, insulation, redesign, and installation to improve airflow and balance
Thermostat and zoning system installation including smart thermostats and multi-zone controls for better comfort and savings
Indoor air quality equipment: high-efficiency filters, HEPA air purifiers, UV germicidal lights, and ERV/HRV ventilation options
Maintenance plans and seasonal tune-ups to maintain efficiency and extend equipment life
Rebate and permitting assistance: guidance on local utility incentives, permitting, and necessary license compliance

How system assessment and sizing works

A properly sized system is the foundation of comfort and efficiency. The assessment typically includes:

Home inspection to evaluate insulation, windows, orientation, and existing ductwork
Load calculation (Manual J) to determine precise heating and cooling needs specific to Sunnyvale conditions
Duct design or Manual D review to ensure airflow meets the selected equipment’s requirements
Energy efficiency targets based on budget, usage patterns, and local incentives
A written recommendation that compares equipment options, expected performance, and estimated operating costs

Choosing the right SEER, HSPF, and AFUE ratings matters. For Sunnyvale, efficient cooling performance (higher SEER) and electrification-ready heat pumps provide the best balance of comfort and long-term energy savings.

What a professional installation and repair looks like

Installation and repair procedures follow established best practices to ensure safety and durability:

Pre-install checklist and site prep to protect surfaces and preserve homeowner belongings
Safe recover and disposal of refrigerants, electrical and gas shutoff procedures where applicable
Proper mounting, refrigerant charging, duct transitions, and airflow balancing
System commissioning: temperature rise, static pressure, safety controls, and thermostat calibration
Final walkthrough explaining operation and maintenance needs

Repairs begin with targeted diagnostics to identify root causes, not just symptoms. Common fixes include capacitor and motor replacement, refrigerant leak repair, control board replacement, and thermostat calibration.

Maintenance plans and warranties

Regular maintenance prevents breakdowns and maintains manufacturer warranties. Typical plan benefits:

Biannual or annual tune-ups covering filter checks, coil cleaning, refrigerant levels, safety controls, and electrical inspections
Priority scheduling and documented service history to support warranty claims
Recommendations for seasonal filter types and replacement intervals based on indoor air quality goals

Manufacturer warranties vary by equipment. Proper installation, timely maintenance, and documented service are essential to preserve coverage.

Rebates, permits, and licensing in Sunnyvale

Upgrading to high-efficiency equipment often qualifies for incentives. Local and regional programs to consider include Pacific Gas and Electric (PG&E) rebates, BayREN efficiency incentives, and federal or state heat pump tax credits. A knowledgeable contractor will identify eligible rebates and help with paperwork.

Permitting and code compliance are required for many installations. In Sunnyvale, work typically requires permits through the City of Sunnyvale Building Division and adherence to California energy code requirements. HVAC contractors in California hold the appropriate C-20 HVAC license or other required contractor classifications to pull permits and ensure code-compliant installations.

Air quality solutions for Sunnyvale homeowners

Wildfire smoke and seasonal allergens make air quality an important consideration:

High efficiency MERV-rated filters and whole-house filtration systems reduce particulates
HEPA purifiers and UV germicidal lights address fine particles and biological contaminants
ERV or HRV systems provide balanced ventilation without sacrificing efficiency
Targeted solutions like dedicated smoke filtration packages during wildfire season

Selecting the right combination depends on house tightness, occupancy, and specific air quality concerns.

COVID-19 safety protocols

Ongoing safety practices help protect occupants and technicians:

Use of personal protective equipment and regular tool sanitization
Contactless estimates and virtual consultations where appropriate
Minimizing time spent inside occupied spaces and respecting homeowner safety preferences
Enhanced ventilation and air cleaning recommendations after service work

Why timely HVAC service matters in Sunnyvale

Addressing HVAC needs proactively reduces repairs, lowers energy costs, and improves indoor air quality. A properly sized, well-installed, and regularly maintained system delivers consistent comfort through Sunnyvale summers and mild winters while minimizing environmental impact. Free written estimates are commonly provided after on-site assessment and typically include scope, timeline, permit assistance, and equipment comparisons to help homeowners make informed decisions.

Providing local expertise, code-compliant installations, and targeted indoor air quality solutions is essential for long-term comfort and savings in Sunnyvale homes.

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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