Looking for an energy-smart upgrade in Hillsborough, CA? Our heat pump installation service outlines all the steps, from evaluating your home and sizing your system to the final commissioning. We address common local issues like ductwork, electrical requirements, and coastal corrosion. We emphasize precise placement, insulation, and noise control. Our guide details the step-by-step installation workflow, from permits and outdoor unit placement to indoor connections and final commissioning, along with maintenance tips to maximize efficiency and protect your warranties. Trust Plum HVAC to handle your installation with care.

Heat Pump Installation in Hillsborough, CA

Schedule My Service

(650) 605 – 5986

Heat Pump Installation in Hillsborough, CA

Installing a heat pump in Hillsborough, CA is a practical, energy-smart upgrade for local homes. With the Bay Area's mild Mediterranean climate, heat pumps deliver both efficient heating on cool coastal nights and reliable cooling during inland warm spells. This page explains how professional heat pump installation in Hillsborough, CA works, what to expect during each stage, common installation issues in the area, and how proper sizing, placement, commissioning, and maintenance protect system performance and warranty coverage.

Why a heat pump makes sense for Hillsborough homes

Hillsborough’s generally moderate temperatures let heat pumps run near peak efficiency year-round, lowering energy bills compared with older electric resistance or gas systems.
Many local residences have a mix of older ducted systems and rooms without ducts. Both ducted heat pumps and ductless mini-splits are common installation options.
Electrification trends and local incentive programs mean homeowners may qualify for permit support and rebates when upgrading to high-efficiency heat pump technology.

Common heat pump installation types and issues in Hillsborough, CA

Ducted heat pump installation: Replaces or retrofits existing forced-air systems; requires duct assessment to confirm sizing and leakage levels.
Ductless mini-split installation: Ideal for room additions, historic homes, or spaces without ducts; multiple indoor heads can be zoned for precise control.
Hybrid systems: Heat pump paired with existing gas furnace for peak-cold backup in poorly insulated homes.
Common local issues:
Undersized units selected without accounting for local microclimates or attic heat gain.
Poor duct integration in older Hillsborough homes with unsealed or undersized ducts.
Inadequate electrical service or panel capacity for larger heat pump models.
Exterior unit placement problems (noise, sightlines, inadequate airflow, or exposed to heavy coastal fog causing accelerated corrosion if not specified correctly).

Initial consultation and site evaluation

A reliable installation starts with an on-site evaluation that includes:

Home heat load calculation based on square footage, insulation, window orientation, and occupancy patterns (Manual J style assessment).
Ductwork inspection for leakage, insulation, and airflow capacity, or assessment of ideal locations for mini-split indoor heads.
Electrical panel review to confirm voltage, breaker space, and wiring needed for new equipment.
Determination of outdoor unit placement for airflow, noise mitigation, and service access while respecting Hillsborough setback and neighborhood aesthetics requirements.This step informs system sizing and model recommendations so the chosen equipment meets comfort goals and efficiency expectations.

System sizing and model recommendations

Proper sizing is crucial. Oversized heat pumps cycle too frequently and reduce comfort; undersized units struggle on peak days. Model selection considers:

Heating and cooling loads for your specific Hillsborough home
Required capacity and efficiency ratings (SEER/HSPF or HSPF2 for cold-climate ratings)
Noise levels, especially in neighborhoods with close property lines
Corrosion-resistant coatings or inverter-driven compressors for coastal influence
Compatibility with existing ducts or preferred mini-split indoor head stylesExperienced installers will present multiple model options with performance tradeoffs and estimated operating cost comparisons for your home.

Installation steps: placement, refrigerant lines, electrical, and duct or mini-split work

Typical installation workflow:

Site preparation and permits: Secure local permits and schedule inspections per Hillsborough codes.
Outdoor unit placement: Install pad or brackets, position for airflow, and manage sightlines and drainage.
Indoor equipment installation:

Ducted: Connect air handler, modify or seal ducts, install supply and return connections.
Mini-split: Mount indoor heads, run refrigerant lines and condensate drain, conceal tubing where possible.

Refrigerant and line set installation: Vacuum and charge refrigerant per manufacturer specifications; minimize line length for efficiency.
Electrical connections: Install breakers, disconnects, and ensure proper wiring, grounding, and surge protection as required.
Integration with controls: Install or upgrade thermostats and program zoning where applicable.
Inspections and paperwork: Complete final inspections and documentation for rebates and warranty activation.

Commissioning and performance testing

Commissioning ensures the installation meets design intent:

Verify refrigerant charge using superheat and subcooling measurements.
Test airflow and temperature split (delta T) across coils for adequate heat transfer.
Confirm electrical loads, start-up current, and safety circuits.
Check control logic, thermostat calibration, and zone balancing.
Leak testing and system evacuation to confirm integrity.Professional commissioning data is often required for rebate qualification and warranty registration in Hillsborough.

Homeowner orientation and maintenance tips

A thorough orientation helps you get the best life and efficiency from your heat pump:

Thermostat settings: Program schedules and recommended setpoints to balance comfort and savings.
Filter care: Inspect or replace filters monthly during heavy use; washable filters should be cleaned regularly.
Outdoor unit maintenance: Keep 2 feet of clear space, rinse debris seasonally, and check for corrosion especially in coastal fog areas.
Condensate management: Ensure drain lines are unobstructed and sloped for proper removal.
Annual maintenance: Pre-season tune-ups before cooling and heating seasons to check refrigerant, clean coils, test controls, and inspect electrical components.

Suggested maintenance schedule:

Monthly: Filter checks and basic thermostat review
Annually: Full system tune-up and refrigerant check
Every 3-5 years: Duct inspection and sealing if ducted system
As needed: Outdoor unit corrosion checks and protective measures in high-salt or fog-prone locations

Permit handling, rebate support, and warranties

Professional installations in Hillsborough should include:

Permit procurement and coordination with local inspections to ensure compliance with municipal and state codes.
Documentation support for available rebates and incentive applications, including performance data and invoices needed for submission.
Post-installation warranty support: Manufacturer equipment warranties and workmanship guarantees from the installer, with clear terms on coverage duration and recommended maintenance to keep warranties valid.

Benefits of timely installation and proper maintenance

Investing in professional heat pump installation in Hillsborough, CA:

Improves year-round comfort with both efficient heating and cooling
Reduces energy use and often lowers monthly utility costs in the Bay Area climate
Preserves indoor air quality and comfort through proper ductwork or mini-split zoning
Protects equipment performance and warranty eligibility through correct commissioning and consistent maintenance

Choosing the right system and following a thorough installation and commissioning process eliminates common problems seen in local installations and ensures long-term reliability. Proper permit handling and documented rebate support make the transition smoother and help maximize the value of your heat pump investment in Hillsborough, CA.

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.

Leave a Review

View All Reviews