Heating installation in Los Altos Hills, CA involves choosing the perfect system for our mild winters and cool nights. We'll help you evaluate options, from high-efficiency heat pumps to gas furnaces and ductless solutions. Our professional pre-installation assessment utilizes Manual J and D methods, combined with envelope inspections and site-specific considerations, to ensure accurate sizing and precise cost estimates. We cover everything from expert duct design and zoning to smart controls and rigorous safety testing, followed by system startup, a clear orientation, and detailed maintenance guidance to maximize efficiency, reliability, and long-term performance for your home.

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Heating Installation in Los Altos Hills, CA

Installing a new heating system in a Los Altos Hills home requires attention to local climate patterns, home construction, and California energy codes. Whether you are replacing an aging furnace, converting to an electric heat pump, or adding a ductless solution for a sunroom or addition, a properly scoped and executed heating installation improves comfort, lowers operating costs, and reduces the risk of future breakdowns. This page explains common options, the pre-installation assessment and load calculation process, ductwork and zoning considerations, quality checks (including HERS/testing where applicable), and what to expect after installation.

Common heating needs and system options in Los Altos Hills, CA

Los Altos Hills has mild winters but cool nights and microclimates across the hills. That pattern shapes which systems perform best:

High-efficiency heat pumps (air-source and cold-climate models): Popular in California for year-round efficiency and to support electrification goals. Best for energy savings and comfortable, even heating.
Furnaces (natural gas): Effective where deeper heating is required; still used in some homes with existing gas infrastructure.
Ductless mini-split systems: Ideal for older homes without ducts, additions, or rooms with independent temperature needs.
Hybrid systems: Heat pump paired with a gas furnace for optimized performance during the coldest nights.
Ducted central systems: When ducts exist, replacement of the air handler and retrofit of ducts can be cost-effective, provided ducts are sized and sealed properly.

Common heating installation issues in Los Altos Hills include undersized systems, poor duct sealing, inadequate insulation in older homes, and mismatched thermostats or zoning that undermines efficiency.

Pre-installation home assessment and load calculation

A reliable installation starts with a detailed assessment:

Manual J load calculation: This determines the precise heating capacity your home needs by accounting for square footage, window types, insulation levels, orientation, and local temperature data specific to Los Altos Hills.
Manual D duct design: If ducts are present or planned, proper duct sizing and layout prevents airflow imbalance and noise.
Envelope inspection: Attic and wall insulation levels, air leakage points, and window performance directly affect system sizing and operating cost estimates.
Fuel and infrastructure review: Evaluate existing gas lines, electrical service capacity, and space for outdoor units (for heat pumps) or flues (for furnaces).
Site considerations: Placement must consider hillside grading, noise constraints, and neighbor impact, as well as local permitting requirements.

Accurate load calculations reduce the risk of oversizing (short cycling, higher costs) or undersizing (poor comfort).

Ductwork design, modification, and sealing

Ductwork is often the weak link in comfort and efficiency:

Duct inspection and testing: Visual inspection plus, where applicable, duct leakage testing ensures integrity.
Design and sizing: Properly sized supply and return ducts prevent pressure differentials and uneven heating.
Sealing and insulation: Sealing joints and insulating ducts in unconditioned spaces avoids heat loss—important in cooler Los Altos Hills evenings.
Modification or addition: For remodels or new systems, new trunk runs, returns, or boots may be necessary to balance rooms.
Transition to ductless: For homes without ducts, wall-mounted or ceiling cassettes provide zone-level control without invasive construction.

Thermostat, zoning integration, and controls

Thermostat selection and zoning are key to performance and comfort:

Smart thermostats and control systems: Provide scheduling, remote access, and integration with home automation, improving efficiency in variable-occupancy homes.
Zoning with dampers: Dividing a home into temperature zones reduces wasted energy and allows for tailored comfort (e.g., lower temperatures in seldom-used guest rooms).
Temperature sensors and balancing: Additional sensors can eliminate hot/cold spots and help the system run more efficiently.

Proper control integration ensures the installed equipment delivers the performance expected from its efficiency rating.

Professional installation process and quality checks (including HERS/testing)

A professional, documented installation follows consistent steps and verification:

Permits and scheduling: Confirm local permitting and inspection timelines for Los Altos Hills and Santa Clara County where applicable.
Equipment delivery and staging: Verify equipment matches specifications from the load calculations and proposal.
Mechanical installation: Correct mounting, refrigerant linework and charging (for heat pumps), gas line connections and combustion venting (for furnaces), and electrical connections.
System startup and adjustments: Balancing airflow, calibrating controls, and setting thermostats to design parameters.
Safety and emissions tests: Combustion analysis and carbon monoxide checks for gas equipment; electrical safety checks; refrigerant leak checks for heat pumps.
HERS and performance testing: Where required or recommended, blower-door testing, duct leakage testing, and HERS verification validate efficiency targets and code compliance.
Documentation: Provide equipment manuals, performance reports, and compliance paperwork for inspections and future reference.

These checks protect your investment by ensuring proper operation and compliance with efficiency programs and building codes.

Post-installation startup, orientation, and maintenance

After installation you should receive a full orientation:

System walkthrough: Explanation of how equipment works, where shutoffs are located, and how to change filters.
Thermostat programming: Demonstration of schedules, setback/hold functions, and remote access if available.
Maintenance guidance: Filter replacement frequency, recommended annual tune-ups, and simple troubleshooting tips.
Warranty registration and paperwork: Manufacturer warranty details and how labor warranties are applied.
Service plans: Typical plans include annual inspections, priority service, and discounted repairs; these help maintain efficiency and extend equipment life.

Regular maintenance is especially useful in coastal-hill microclimates where salt air and temperature swings can affect outdoor equipment.

Warranties, service plans, and what they cover

Understanding warranty distinctions prevents surprises:

Manufacturer warranty: Covers defective components for a set period; length and terms vary by model and often require registration.
Labor warranty: Covers installation workmanship for a defined period; verify what is included.
Extended protection plans: May cover parts and labor beyond manufacturer terms and typically include annual maintenance visits.
What to watch for: Voiding conditions (improper maintenance, unauthorized repairs) and required maintenance frequency to keep warranties valid.

Steps to get a quote and schedule installation (what to expect)

A typical homeowner experience includes these neutral steps:

Provide basic home details (square footage, existing system type, and any remodels).
Arrange a site visit for a full assessment, Manual J load calculation, and duct inspection.
Receive a written proposal outlining system options, equipment specifications, installation scope, permitting requirements, and timeline estimates.
Select system and schedule permitting and installation windows consistent with local inspection availability.
Installation, testing, HERS/verification if applicable, and post-installation orientation and documentation.

Choosing the properly sized, installed, and verified system tailored to Los Altos Hills climate and home specifics ensures better comfort, lower energy use, and long-term reliability. Regular maintenance and attention to controls and ductwork preserve performance for years to come.

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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