Craftsman and Tudor homes from the 1900s–1930s with no original ductwork. Steep hillside lots make retrofit duct runs impractical. Mini-splits install in a day with minimal structural impact — ideal for zoning upper and lower floors independently.

Historic homes · No ductwork · Multi-floor zoning 
· Hilly terrain

Brick apartment buildings, co-op condos, and vintage single-family homes — mostly built without central air. Running ducts through plaster walls or masonry is invasive and costly. Mini-splits add heating and cooling without structural compromise and are the most practical first-time AC solution here.

Brick buildings · Condos & co-ops · No central air · AC

Early 20th-century bungalows built without forced-air systems. Mini-splits are the direct solution — no duct retrofit needed, and they eliminate the 15–20% energy loss common in older leaky ductwork. Newer infill townhouses may qualify for a ducted heat pump depending on what’s already installed.

Bungalows · No existing ducts · Energy efficiency

Compact lots, older homes, and live-work spaces where duct retrofits are rarely practical. Mini-splits provide zoned comfort — heat or cool only the rooms in use. Lower operating costs and reduced emissions align well with the neighborhood’s energy-conscious character.

Compact lots · Zoned comfort · Live-work spaces

Predominantly postwar single-family homes from the 1950s–70s, many with existing forced-air furnace systems and functional ductwork. Replacing an aging gas furnace with a ducted heat pump here is straightforward — the infrastructure is already in place.

Postwar homes · Existing ductwork · Furnace replacement

Mid-century and postwar construction with central forced-air systems. Larger lot sizes and well-maintained homes make ducted heat pump upgrades practical and cost-effective. Strong candidate for PSE rebates when replacing gas or electric resistance heat.

Mid-century · Central ducts · PSE rebate eligible

Craftsman homes, Seattle Boxes, and postwar bungalows — most without central ductwork. Hilly terrain adds complexity to any duct retrofit. Mitsubishi Hyper Heat models work down to −13°F, which matters on Beacon Hill’s exposed elevated streets during cold snaps

Seattle Box & Craftsman · Hilly terrain · Cold-climate models

Older Craftsman and bungalow stock mixed with mid-century homes that may have functional forced-air. Homes with oil or electric baseboard heat are strong heat pump candidates with WA state rebates available; homes without ductwork are better served by mini-splits.

Oil heat conversion · Baseboard replacement

Older single-family homes, converted multi-units, and apartment buildings from the 1920s–60s — most without central ductwork. Mini-splits are common for both owner-occupied and rental properties. For landlords, ductless systems service each unit independently without affecting neighboring tenants.

Rental properties · Multi-unit · Property management