Quick answer
Choose ductless when you lack ducts, need zone control, or add a room; choose central AC when you have sound ductwork and want whole-home cooling from one outdoor unit — Seattle's mild cooling load makes both viable with correct sizing.
- Compare practical options by risk, cost range, and comfort outcome.
- Identify what to verify in an estimate before you sign.
- Choose a path that fits your budget and timeline.
Deciding between quotes
You received both ductless and central proposals for the same comfort problem.
Compare your options
Ductless wins when
No existing ducts, targeted rooms, baseboard heat replacement, or PSE ductless rebate applies.
Central wins when
Existing duct system is sized and sealed, whole-home cooling needed, aesthetic preference for hidden delivery.
Key terms and context
This guide is written for heating & air decisions in the Puget Sound. It uses the same terminology you'll hear from inspectors, technicians, and permit offices.
Too many ductless heads
Whole-home via many heads can exceed central cost — design matters.
How we build this guidance
- Straight answers first, so you know your options without the fluff.
- Written and reviewed by techs who do this work every day.
- Specific to Puget Sound homes, weather, and utilities.
- Updated 2026-06-08 from real heating & air jobs around the region.
Methodology: Decision framework from Eco load calculations and rebate eligibility.
Last updated: 2026-06-08
Ready for the next step?
Get a free, no-obligation estimate from Eco — honest range before any work begins.
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Common questions
Can ductless heat too?
Yes — most Puget Sound ductless units are heat pumps providing year-round comfort.