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What type of home do you live in?
How much of your home do you want to cool?
Is your home single or multi-story?
Is there an existing cooling system installed in your home?
How big is your home?
Does your home have existing ductwork?
Which city are you in?
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Cooling Options
AC Systems for Snohomish County
Local 2026 pricing — installed cost
Central AC
Best for homes with existing ductwork. Cools the whole home evenly. Most cost-effective replacement for ducted homes.
Ducted Heat Pump
Heats AND cools using existing ducts. Most efficient for PNW climate. Qualifies for federal tax credit up to $2,000.
Federal credit eligible
Ductless Mini Split
Single zone — perfect for one room or addition. No ductwork needed. Heats and cools year round.
Federal credit eligible
Multi-Zone Ductless
Multiple wall units from one outdoor system. Whole-home cooling without ductwork. Each room controlled independently.
Federal credit eligible
Common Questions
AC System FAQ
Specific to Snohomish County homeowners
For homes without ductwork in Snohomish County, a ductless mini split or multi-zone ductless heat pump is almost always the right choice. No major construction required — installation typically takes one day per zone.
If your home has ductwork in good condition, central AC or a ducted heat pump is usually the most cost-effective choice. Without ductwork, ductless is more practical. For Pacific Northwest climates, heat pumps outperform standard AC for year-round efficiency.
A heat pump makes more sense for most Snohomish County homeowners — it cools in summer and heats in winter. It also qualifies for federal tax credits up to $2,000.
Adding AC to a Mill Creek home typically costs $4,000–$22,000 depending on system type and zones. A single-room ductless unit starts around $4,000. Whole-home coverage without ductwork runs $8,500–$22,000.
Heat pump installations qualify for a federal tax credit up to $2,000 on your tax return. Snohomish County PUD also offers rebates of $1,800–$2,500 for qualifying heat pump installations through registered contractors.
Most ductless mini split installations in Mill Creek are completed in one day. Central AC with existing ductwork takes 1–2 days. Jobs requiring new ductwork may take 3–5 days.
A mini split (also called a ductless mini split or ductless heat pump) is a heating and cooling system that requires no ductwork. It has two main parts — an outdoor compressor unit and one or more indoor wall-mounted air handlers connected by a small conduit through the wall. Mini splits are popular in Snohomish County homes without existing ductwork, and in older homes where installing ducts would be costly or impractical. Most units heat and cool, making them a year-round solution.
A single-zone mini split handles one room or area — typically up to 500–1,200 sqft depending on the unit size. For whole-home coverage, a multi-zone system connects multiple indoor units to one outdoor unit. Most Snohomish County homes need 2–4 zones for full coverage across all living areas.
For most Snohomish County homeowners, yes. Mini splits are quieter, more efficient, heat AND cool, and don’t block windows or require seasonal removal. They cost more upfront than window units but last 15–20 years, qualify for federal tax credits up to $2,000, and provide consistent year-round comfort — something window units can’t match.