Ductless Mini Split Installation in Oakland, CA

Room-by-room comfort without ductwork — ideal for additions, garages, and older homes. In Oakland (Alameda): Microclimates: cooler flats near the lake, hotter inland hills. Mixed housing stock. Typical demand: Repair on older systems, mini-splits for flats and ADUs, heat pumps with Ava rebates.

Ductless mini splits are the cleanest way to heat and cool spaces where running ducts isn’t practical: ADUs, garages, additions, or older Bay Area homes that never had central air.

We mount the indoor heads, set the outdoor unit, run the line set through a single small penetration, and commission every zone so it performs the way the spec sheet promised.

How the visit runs. Zone mapping: Free estimate where we walk the rooms you actually use and size each zone — one head per zone you want to control. Placement plan: Indoor head positions, outdoor unit location, and line routing planned so the install stays clean and quiet. Install day: Heads mounted, outdoor unit set, line set through a single small penetration — a typical single-zone install takes about a day. Commissioning: Vacuum, pressure test, and refrigerant charge by the book, then remote and app control set up for every zone.

OTTER HVAC is based at 2939 Santos Ln, Walnut Creek, CA 94597. Oakland is a regular route. Hours: 7:00am–5:00pm, seven days a week. Diagnostic visits are $69. New installation estimates are free in-home. Call (650) 900-0440.

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