A wall-mounted mini split in a bedroom with wood panelling
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Boost Services Heating and CoolingMini Splits

Ductless mini split systems

Room-by-room heating and cooling for additions, garages, ADUs and homes without ducts.

A mini split is a heat pump without ducts: an outdoor unit, one or more indoor heads, and refrigerant lines through a small hole in the wall. Each head has its own remote and its own temperature.

We install, repair and maintain them. They suit rooms the ducts never reached, additions and conversions, and houses with no ductwork at all.

Where they disappoint, it is almost always sizing or placement: a head too big for the room, an outdoor unit boxed in where it cannot breathe, or a drain line without a slope. Those are decided on installation day, which is why the visit before the quote matters.

How it works

How a mini split works

One outdoor unit holds the compressor. A line set runs through a single small hole in the wall to each indoor head: two refrigerant lines, a communication wire and a drain hose. Each head has its own remote and its own temperature, and because the system is a heat pump the same unit heats in winter.

How a mini split works An outdoor unit with the compressor connects through one small hole in the wall to one or more indoor heads by a line set: two refrigerant lines, a communication wire and a drain hose. It cools in summer and, being a heat pump, heats in winter. Outdoor unit compressor and coil one hole through the wall line set: two refrigerant lines communication wire and drain hose Indoor headits own remote, its own setpoint Second head (optional)multi-zone: same mode, own temperature refrigerant out refrigerant back (reverses in winter: it is a heat pump) condensate to the outside
Mini split services

Everything we do with mini splits

Sound familiar?

Why people call us for mini splits

  • A room the central system never reaches
  • An ADU, garage or converted space
  • No existing ductwork
  • Independent control per room
  • Quiet operation
A ductless outdoor unit installed below a row of windows
What the visit includes

$69 diagnostic, credited toward the work

  1. Site survey and head placement
  2. Single or multi-zone design
  3. Line set routing and finish
  4. Condensate and disconnect tie-in
  5. Commissioning and controls walkthrough
Schedule service
What to expect

How we work on mini splits

Tell us what you have, or what you want: a new system for a room the ducts never reached, a head that is not cooling, a drip down the wall or a yearly cleaning.

For new work the room gets measured before any equipment is named. For a fault, the system is tested before anything is assumed, starting with the simple things: the remote's mode, the setpoint, a timer, the filter and the drain line.

You get a written price before any work starts. For a repair, the $69 diagnostic is credited toward the work. Installed, repaired or cleaned, the system is run and checked in both heating and cooling before we leave, and our labor carries a one-year warranty.

Brands we service

We repair, maintain and install these brands. Logos identify the equipment we work on and do not imply endorsement by the manufacturer.

Good to know

Before you call

  • Sizing decides it

    An oversized head hits its setpoint fast, shuts off and swings, and the room never dehumidifies. Ceiling height, an uninsulated door and west sun count more than square footage. Read more

  • Every head runs in one mode

    On a multi-zone system all the heads share one compressor, so they all heat or all cool. Each room can have its own temperature, but a head asking for heat while the others cool will sit idle. Read more

  • Filters monthly, deep clean every year or two

    Rinse the filters monthly during the cooling season. A professional coil and blower cleaning roughly every one to two years suits most homes, sooner near a freeway, with pets, or after a smoke season. Read more

  • Dripping means the drain

    The head pulls moisture out of the air and a small hose carries it outside. Block the hose, tilt the head or freeze the coil and the water finds another way out, usually down the wall. Read more

  • Where the water goes

    The head drips into a shallow pan under the coil, and a flexible drain hose runs out through the wall inside the line-set cover to a stub near the outdoor unit. If you have seen it dripping outside on a hot day, that is the system working. Read more

FAQ

Common questions

A ductless heat pump. The compressor sits outside, a slim head sits on the wall inside, and refrigerant lines connect them through one small hole. It heats and cools, and it runs at partial speed instead of slamming on and off, which is why it is quiet.

★★★★★
“David was great and super helpful, got our AC back and running within an hour! He was also very flexible with my rescheduling which I really appreciated.”
Jake L. · Google · Read our reviews
Get in touch

Schedule service

Fill in the form or call. We are on the phones 6am–10pm.

818-277-5056

Licensed #1119892 · Veteran-owned · Pasadena & Reseda

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