Ductless mini splits are the fix for Sammamish’s most common comfort problems — the too-hot bonus room, the cold daylight basement, the addition with no duct connection. HotWire designs and installs mini split systems from single-zone add-ons through 8-zone whole-house conversions.
Sammamish Problems Ductless Solves
Single-zone systems — one outdoor unit paired with one indoor head — install in 4–6 hours in most Sammamish homes and solve targeted comfort problems for a bonus room, basement, or addition. Sizing typically 9,000–24,000 BTU. Multi-zone systems pair one larger outdoor unit with 2–8 indoor heads across the house — outdoor capacity ranges 24,000 to 60,000+ BTU. Indoor unit styles include: wall-mount high (most common, 90° up angle, discreet), wall-mount low (near the floor, good for rooms with cathedral ceilings), ceiling cassette (recessed, 360° discharge, most premium look), slim-duct concealed (feeds into short duct runs for hidden install, good for master suites), floor-mount console (looks like a heater under the window, easy retrofit). Line sets — the refrigerant and communication cables between outdoor and indoor units — route through walls, attics, and along exterior walls. Careful routing plan makes the install look intentional, not tacked on.
Ductless installation quality separates a system that works beautifully for 15 years from one that leaks refrigerant, drips condensate, buzzes at night, and gives you buyer’s remorse. The details that matter: proper vacuum on the line set (400 microns or lower, held for 30 minutes minimum) before releasing refrigerant; nitrogen purge during brazing; correctly sized line-set for actual run length; drainage pitched correctly with condensate pump where required; wall bracket rated for the outdoor unit’s weight and vibration; line-set covers routed cleanly on the exterior; proper commissioning per manufacturer procedure. HotWire’s install technicians do all of it because we’ve done thousands of ductless installs and we know which shortcuts create service calls later.
Sammamish ductless projects typically start with a site visit and design walkthrough — we walk your home, identify the problem spaces, discuss aesthetic preferences for indoor unit placement, evaluate line-set routing options, check electrical capacity, and produce a written design with equipment specifications. Install day: crew of two, single-zone install completes in a day, multi-zone typically 2–3 days depending on head count and line-set complexity.
Mitsubishi installs qualify for Diamond Contractor extended labor warranty (12 years on parts, 12 years on compressor, 5 years on labor with registration). Daikin installs qualify for their 12/10-year warranty. PSE ductless rebates $600–$1,600 per outdoor unit. Federal 25C tax credit 30% up to $2,000. All paperwork handled.
We provide HVAC and appliance repair throughout Sammamish, including:
