(408) 978-3093

Mini-Split Installation and Repair in San Jose, CA

Heat and cool a room, an addition, an ADU or a whole home without ductwork. Our licensed San Jose HVAC technicians design and install single and multi-zone ductless mini-splits and repair and maintain the ones you have. A single-zone system typically costs $3,000 to $8,000 installed; multi-zone systems run $9,000 to $15,000.

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Mini-Split Services in San Jose

Wall-mounted, ceiling cassette and ducted mini-split heat pumps from major brands.

  • Mini-split installation

    Single and multi-zone systems sized room by room, with clean line-set routing, condensate drains and a dedicated circuit.

  • Mini-split repair

    Error codes, no heat or cooling, water leaks, ice, noisy fans and refrigerant leaks diagnosed and fixed.

  • Mini-split maintenance

    Filter and coil cleaning, blower wheel cleaning, drain flush, and refrigerant and electrical checks.

  • ADUs, additions and garages

    Efficient heating and cooling for spaces the main system doesn't reach, without extending ducts.

  • Whole-home ductless

    Multi-zone systems that replace wall heaters or a failing furnace in homes without ducts.

  • Problem rooms

    Upstairs bedrooms, sunrooms and home offices that are always too hot or too cold.

Is a Mini-Split Right for You?

Ductless systems solve these common comfort problems.

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  • No ductwork

    Older homes heated by wall or floor furnaces, or with no AC.

  • An addition or ADU

    New space that the existing system can't handle.

  • One room is always uncomfortable

    A bedroom over the garage or a sunny office that never stays cool.

  • Replacing wall heaters

    Efficient heat pump heating in place of old gas wall furnaces.

  • Zoned control

    Each zone has its own thermostat, so unused rooms aren't heated or cooled.

  • Your mini-split needs service

    Leaks, error codes, odors or weak airflow from an existing unit.

How a Ductless Mini-Split Works

A mini-split has an outdoor heat pump connected to one or more indoor units by a small line set (refrigerant lines, power and a condensate drain) that passes through a three-inch hole in the wall. Each indoor unit has its own fan, filter and thermostat, so you heat or cool only the rooms you’re using. Variable-speed compressors adjust output smoothly, which makes them quiet and efficient.

Indoor Unit Options

  • Wall-mounted units: the most common and affordable.
  • Ceiling cassettes: recessed into the ceiling, blowing air in four directions.
  • Floor consoles: low on the wall, good under windows and in rooms with sloped ceilings.
  • Concealed ducted units: hidden in an attic or soffit, serving one or two rooms through short ducts.

Mini-Split Repair and Maintenance

The most common problems we see are dirty filters and coils, clogged condensate lines that leak water down the wall, failed sensors and boards that throw error codes, and refrigerant leaks at flare connections. Regular cleaning prevents most of them. Indoor coils and blower wheels can also grow mold if they’re not cleaned, which shows up as a musty smell when the unit starts.

Sources

Checked October 2026.

How Much Does a Mini-Split Cost in San Jose?

A single-zone ductless mini-split in San Jose typically costs $3,000 to $8,000 installed; multi-zone systems run $9,000 to $15,000.

Typical mini-split services prices in San Jose, installed, in US dollars. Checked October 2026.
ServiceTypical San Jose price (USD)
Ductless mini-split, single zone$3,000–$8,000
Ductless mini-split, multi-zone$9,000–$15,000
Ducted heat pump, for comparison$8,000–$25,000
Inspection feeWaived for service plan members$59

What affects the price

  • Number of zones. Each indoor unit adds equipment and line set.
  • Line-set length and routing. Long or concealed runs take more time.
  • Electrical. A new dedicated circuit, or a panel upgrade in some homes.
  • Indoor unit style. Ceiling cassettes and ducted units cost more than wall units.
  • Rebates. Heat pump rebates may apply when replacing gas heat.

Most repairs are quoted as a fixed price before we start. Ranges are typical for San Jose and the South Bay and don't include current specials.

Read the heat pump installation cost guide →

How Our Mini-Split Installation Works

  1. Assess the space

    We measure rooms, check sun exposure, insulation and the electrical panel.

  2. Size each zone

    We size each indoor unit with a load calculation.

  3. Plan the layout

    We place indoor units, the outdoor unit and line-set routes for performance and looks.

  4. Written price and permit

    You get a written price; we pull the permit.

  5. Install and commission

    We mount units, run lines, vacuum and charge, and test every zone.

  6. Teach and maintain

    We show you the remote and filters, and can add maintenance to a service plan.

Mini-Splits in San Jose

Why ductless systems are popular in South Bay homes.

  • ADU construction

    Accessory dwelling units are common across San Jose, and mini-splits are a natural fit for them.

  • Older homes without ducts

    Many older homes still rely on gas wall or floor furnaces; mini-splits replace them with efficient heat pump heating and add cooling.

  • Rebates

    San Jose Clean Energy's EcoHome Rebate covers qualifying heat pump systems that replace gas equipment; check current terms.

  • Permits

    Mini-split installations need a mechanical and electrical permit; we handle them.

Neighborhoods we serve: Downtown San Jose · Willow Glen · East San Jose · South San Jose · Evergreen · Cambrian Park · West San Jose · Berryessa · North San Jose · Blossom Valley

Current Specials

Save on your visit. Mention the offer when you book.

What Our Customers Say

Google 4.9 from 130+ reviews: read more →See photos of our work →

  • Our new heat pump system has just been installed and we are very pleased with CPI and the new equipment. We are especially grateful for the knowledgeable and hard-working technician Bunhak, who worked throughout our recent heatwave to finish the job. We would highly recommend CPI for any HVAC installation or maintenance.

    Linda G.Google review

  • CPI Service is a great company to use for HVAC too! Our A/C stopped working during the recent heatwave & another company wanted to replace our whole unit. Then we called CPI & they found it didn’t need to be replaced, they fixed it that day! I really appreciate a company that responds quickly, is very professional & reasonably priced!!! I’ll be using them for sure in the future.

    Jaycee V.Google review

  • Great, reliable, and timely service at a reasonable price. I shopped around quite a bit before landing on CPI. Their rates were competitive, they responded promptly, and their plumber fixed a few issues quickly and without much fuss. I’ll definitely be calling them again the next time we have issues!

    Allan H.Google review

Mini-Split Services FAQs

How long does mini-split installation take?

A single-zone system usually takes one day. Multi-zone systems take one to three days, depending on the number of zones and line-set routing.

How often should a mini-split be serviced?

Clean the filters monthly in heavy use, and have the system professionally serviced once or twice a year.

How long do mini-splits last?

Typically 15 to 20 years with regular maintenance.

Should I repair or replace my mini-split?

Most problems, like sensors, boards, fan motors and leaks, are repairable. Replace when the system is old, uses phased-out refrigerant, or needs a compressor.

Can a ductless mini-split heat and cool my home?

Yes. Mini-splits are heat pumps that provide both heating and cooling, and they heat efficiently in San Jose's mild winters.

How much does a mini-split cost in San Jose?

Typically $3,000 to $8,000 for a single zone and $9,000 to $15,000 for multi-zone systems.

Helpful Guides

Serving San Jose and the South Bay

Our shop is at 2880 Aiello Dr in San Jose. We provide mini-split services across the city and nearby South Bay and Peninsula communities. See our full service area.

Content and prices reviewed October 2026.

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