Definition
Zone HVAC system with outdoor compressor and indoor head(s) — no ductwork; common for additions, ADUs, and baseboard replacement in Washington.
Why this term matters for homeowners
In the Puget Sound, HVAC terms often connect to efficiency ratings, comfort outcomes, and rebate eligibility.
- Use this term to ask better follow-up questions during estimates.
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- Confirm how this applies to your specific home age, layout, and utility setup.
Related pages
Trade: Heating & Air