Ductless vs ducted heat pump: which fits your home?

The basic difference

Both are heat pumps — they heat and cool using the same technology. A ducted heat pump uses an indoor air handler (or your furnace's blower) and sends air through your existing ducts. A ductless mini-split puts small indoor heads directly in the rooms they serve, connected to the outdoor unit by refrigerant line sets.

When ducted is the better choice

Ducted systems shine in homes that already have forced-air heating with ducts in decent shape — common in Eastside suburbs like Bellevue, Redmond, Sammamish and Bothell, and in many Seattle homes built after the 1960s.

• Nothing visible inside except vents and a thermostat.
• Whole-home filtration — easy to add MERV-13 media filters for wildfire smoke.
• One system to maintain.
• Often the simplest swap when replacing a furnace and AC together.

When ductless is the better choice

Ductless fits homes without ducts — electric-baseboard ramblers, many older Seattle bungalows, condos, ADUs — and spaces ducts don't serve well, like bonus rooms, additions and converted attics.

• No ductwork needed — minimal disruption to plaster and finished spaces.
• Room-by-room control — heat or cool only the rooms you use.
• High efficiency with no duct losses in crawlspaces or attics.
• Can be installed in stages, one zone at a time.

Trade-offs to weigh

Ductless heads are visible on walls or ceilings, and each one needs periodic filter cleaning. Ducted systems depend on duct quality — leaky or undersized ducts cost efficiency and comfort, so a ducted quote should include a duct inspection and any sealing needed.

Cost depends on the house. A ducted system on good existing ducts can be very cost-effective; a whole-home multi-zone ductless system with many heads can cost more. On the other hand, adding new ducts to a home that has none is rarely worth it compared to ductless.

Hybrid setups

Many Puget Sound homes use both: a ducted heat pump for the main floors and a ductless head in a bonus room, addition or finished attic. It's often the most comfortable and cost-effective answer for houses that have been added on to over the years.

Rebates

Utility incentives can change the math more than any other line item. Seattle City Light and Puget Sound Energy both run heat pump incentive programs, and some Eastside cities add local programs on top. Eligibility depends on your utility, what you're replacing (gas, oil, electric resistance or an older heat pump) and the efficiency rating of the new equipment. We confirm what applies to your home during the estimate, show the price after incentives, and file the paperwork for you.

How we decide during an estimate

We start by looking at your existing system and ducts: where they run, whether they're sealed and insulated, and whether every room gets enough supply and return air. We measure the home for a load calculation and check the electrical panel. Then we ask how you use each room — which ones are too hot or cold, which ones you rarely use, and whether wildfire smoke or allergies are a concern.

From there we'll usually show you two or three options: a ducted heat pump on improved ducts, a ductless layout, and sometimes a hybrid. Each comes with the price after any rebates you qualify for, so you can compare comfort, looks and cost directly.

If you've already received a quote and you're not sure whether ducted or ductless was the right recommendation, a free in-home estimate from us is a quick way to compare.