Mountain View residents looking to install or upgrade their air conditioning can rely on Plum HVAC for expert, full-service solutions focused on comfort, efficiency, and compliance. We handle all system types—including central, ductless, package units, and heat pumps—while performing detailed site assessments with Manual J and D calculations to ensure proper sizing and energy efficiency. Our team manages the entire installation process, including permitting, inspections, commissioning, and warranty documentation, while addressing local climate considerations and providing guidance on maintenance and system controls for reliable, long-lasting performance.

Air Conditioning Installation in Mountain View, CA

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Air Conditioning Installation in Mountain View, CA

A well-designed and properly installed air conditioning system keeps your Mountain View home comfortable during summer heat while lowering energy costs and prolonging equipment life. Whether you’re replacing an older system, installing a new central AC, or converting to ductless mini-splits, Plum HVAC ensures a professional installation that prevents common issues like short cycling, uneven cooling, and high energy bills. Our team handles every step—from installation day expectations to inspections, warranty support, and energy-saving recommendations tailored to Mountain View’s local climate.

Why proper AC installation matters in Mountain View

Mountain View’s mild Mediterranean climate still brings hot, humid summer days and occasional inland heat spikes. High-efficiency systems and correct sizing are important because:

Energy costs in the Bay Area can be significant, so efficiency saves money.
Local building codes and California energy standards (including Title 24 requirements) influence equipment choice and installation details.
Proper ventilation and ductwork reduce indoor humidity and improve comfort in homes with modern open layouts common in Mountain View neighborhoods.

Common air conditioning installation types for Mountain View homes

Central air conditioning (split systems) for homes with existing ductwork.
Package units for homes without basements or attic space.
Ductless mini-split systems for older homes, additions, or zone cooling.
Heat pump systems that provide both efficient cooling and heating during cooler months.Each option has tradeoffs for efficiency, upfront cost, and aesthetics. System selection is driven by load calculations, existing ductwork, and your home’s layout.

Initial site assessment: what we evaluate

A thorough site assessment forms the basis for correct system selection and sizing. Key elements reviewed:

Square footage, ceiling heights, insulation levels, window orientation, and air infiltration.
Existing ductwork condition and layout; need for duct sealing or redesign.
Electrical capacity and panel space for new equipment.
Preferred locations for outdoor and indoor units, refrigerant line routing, and condensate drainage.
Occupant comfort preferences and typical schedules for optimizing controls.

A proper assessment includes a Manual J load calculation and, if ducts are present, a Manual D duct evaluation. These calculations help avoid an undersized or oversized system that leads to performance and efficiency problems.

System selection and sizing

Correct sizing matters more than brand. Oversized units cycle on and off frequently, reducing dehumidification and lifespan. Undersized units run continuously and may not maintain comfort during peak days.

SEER and HSPF ratings: choose higher SEER for greater cooling efficiency. In Mountain View, higher-efficiency models typically pay back faster because of frequent summer use.
Variable-speed or inverter-driven compressors often deliver more consistent comfort and better humidity control.
Consider refrigerant type and future regulations; newer low-GWP refrigerants are increasingly common.

Professional installation steps

A professional installation follows a predictable sequence to ensure safety and performance:

Pre-install preparation: protect flooring, furniture, and landscaping; stage equipment.
Removing old equipment (if applicable), inspecting the pad or mounting surface.
Installing indoor components: air handler, evaporator coil, or indoor mini-split heads.
Installing outdoor condensing unit and securing electrical and refrigerant connections.
Running and insulating refrigerant lines and installing proper condensate drainage.
Electrical hookup, circuit installation, and ground connections following local code.
Ductwork repairs or upgrades, including sealing, adding insulation, or zoning dampers if needed.
Evacuation and charging of refrigerant to specified levels.
System startup, airflow balancing, and thermostat configuration.

Permits, inspections, and code compliance

Mountain View and Santa Clara County require permits for most new AC installations or significant equipment replacements. Professional installers typically handle permit applications and coordinate inspections with local building departments. Expect the following:

Permit application and fees submitted prior to installation.
Mid-install or final inspections by local inspectors to verify electrical work, refrigerant handling, and adherence to energy code requirements (e.g., Title 24 measures).
Documentation provided for compliance and for registering warranties when required.

Timely permit coordination reduces the risk of rework and ensures your system meets local safety and efficiency standards.

Post-installation testing and commissioning

After installation, a comprehensive commissioning process confirms the system performs as intended:

Verify correct refrigerant charge and pressure.
Measure airflow and static pressure; adjust blower speeds for optimal distribution.
Test safety controls, condensate backups, and electrical connections.
Confirm thermostat calibration and program schedules for efficient operation.
Walk-through with homeowners to demonstrate system operation, maintenance needs, and troubleshooting basics.

Proper commissioning reduces callbacks and improves long-term reliability.

Warranty and documentation

New equipment typically carries a manufacturer warranty for parts and sometimes compressors. Professional installations should also include an installer workmanship warranty. Keep these records:

Manufacturer warranty paperwork and serial numbers.
Installer service documentation and any permit/inspection records.
Maintenance schedule and recommendations to preserve warranty coverage.

Common installation issues and how they’re prevented

Incorrect sizing (oversized/undersized): prevented through Manual J load calculations.
Poor duct sealing or undersized ducts: resolved by duct testing, sealing, and redesign when necessary.
Improper refrigerant charge or airflow: corrected during commissioning with professional tools.
Electrical capacity problems: identified during the site assessment and addressed with proper circuit installation.
Delayed permits causing work stoppages: mitigated by early permit application and experience with local jurisdictions.

Energy-saving recommendations for Mountain View homeowners

Choose high-SEER systems and variable-speed compressors for better efficiency on warm Bay Area days.
Install a programmable or smart thermostat to match cooling to occupancy and reduce run time.
Improve insulation, seal windows and doors, and add shading or reflective window film to reduce heat gain.
Use ceiling fans to allow slightly higher thermostat settings while maintaining comfort.
Schedule regular maintenance, including filter changes, coil cleaning, and annual system checks.

Regular preventative maintenance keeps systems running at peak efficiency and helps avoid expensive repairs.

What to expect on installation day

Clear arrival window and a brief site walkthrough to confirm scope.
Protection of floors, landscaping, and valuables; equipment staged outside.
Install team will remove old unit (if present), install new equipment, and test systems.
Typical installations take one to two days for central systems; ductless or complex retrofits may require additional time.
The team will conduct final testing and provide a system walkthrough, showing how to use controls and maintain the equipment.

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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