Mini-Split Installation in Mercer Island, WA
Zoned, whisper-quiet comfort without ductwork. Perfect for additions, ADUs, and rooms that never quite reach the right temperature.
A ductless mini-split is often the practical answer for Mercer Island's shoreline Point homes and other tight lots where running new ductwork isn't realistic given the island's grading and access constraints.
Symptoms we see every week in Mercer Island
- One room that's always too hot or too cold
- Adding an ADU, addition, or converted garage
- Ductwork is impractical or too costly
- You want per-room temperature control
Spec'd to your Mercer Island home
We size every system to your actual demand — not a one-size guess. Here's what a typical mini-split installation includes:
| Capacity | 9k–48k BTU |
|---|---|
| SEER2 | Up to 30.5 |
| Noise | 19–26 dB (whisper) |
| Zones | 1–8 per system |
Mini-Split Installation in Mercer Island: what's different here
Elevation on the island runs from about 18 feet at the lakefront to almost 400 feet near the ridge, so equipment placement, condensate drainage and access change from block to block. Ductless mini-splits are a good fit for older Mercer Island homes in East Seattle and the North End that have baseboard heat or no ductwork upstairs. We plan line-set routes to keep them neat on the outside of the house.
Permits and inspections
A mini-split install typically needs a mechanical permit plus an electrical permit for its dedicated circuit. Mechanical and plumbing permits in Mercer Island go through the City of Mercer Island Permit Center. When the work needs a permit, we pull it, schedule the inspection and leave you the paperwork.
Utilities and rebates
Mercer Island homes get electricity from PSE, and most have PSE natural gas. Mercer Island homeowners may qualify for utility, state or federal rebates. We point you to the current programs for your address before you sign.
Where we work in Mercer Island
Our job records show more than 80 completed jobs for Mercer Island customers across ZIP codes 98040. We take mini-split installation calls in East Seattle, the North End, the South End, First Hill and the rest of Mercer Island.
Work we stand behind
12-year compressor warranty, 2-year labor, and a free first-season tune-up.
Book this serviceGet a same-day quote from a real technician in Mercer Island.
Straight answers for homeowners in Mercer Island.
Who issues the permit for mini-split installation in Mercer Island?
Mechanical and plumbing permits in Mercer Island go through the City of Mercer Island Permit Center. For mini-split installation, we apply for the permit, book the inspection, meet the inspector on site, and give you the final sign-off for your records.
Can a mini-split heat my whole Mercer Island home?
Yes, a multi-zone system can heat and cool most Mercer Island homes, but it depends on layout and insulation. We do a room-by-room load calculation and give a written quote. Mercer Island homeowners may qualify for utility, state or federal rebates. We point you to the current programs for your address before you sign.
Which Mercer Island neighborhoods do you cover?
Our job records show more than 80 completed jobs for Mercer Island customers across ZIP codes 98040. We take mini-split installation calls in East Seattle, the North End, the South End, First Hill and the rest of Mercer Island. Call (425) 615-5000 for same-day service.
Related services in Mercer Island
One electric system that heats and cools — the cold-climate models we install work down to -13°F — and pairs with solar.
Learn moreHeat pump not heating, cooling, or defrosting right? Same-day diagnosis with a written price before any work begins.
Learn moreA properly sized, high-efficiency furnace for Pacific Northwest winters.
Learn moreSame-day furnace repair when the heat goes out, with a written price before any work begins.
Learn more