Quick answer
The right system depends on the house more than the brochure. A pre-1940 Craftsman with plaster walls and no ducts, a 1960s rambler on electric baseboard, and a 2005 townhome with a tiny mechanical closet each point to different equipment — and different electrical and plumbing realities along the way. Pick the home style below that sounds like yours and see what genuinely fits, what's worth comparing, and which guides to read next.
- Seattle's housing stock falls into a handful of patterns — and each pattern has a known best-fit retrofit path.
- Pre-war homes usually skip ducts entirely (ductless multi-zone); duct-equipped homes usually reuse what they own.
- The electrical panel and the water heater ride along on almost every comfort decision — that's why we assess all three trades at once.
- Guidance, not a spec: the real answer always comes from an in-home load calculation and inspection.
Why does home style matter more than brand?
Because the house sets the constraints: whether ducts exist and are usable, whether the panel can carry new loads, where equipment can physically fit, and how many zones daily life actually needs. Two neighbors can buy the same excellent heat pump and get opposite results if one home's ducts leak into the crawlspace and the other's panel was already at capacity. Match the system to the house first; pick brands and models second.
How to use this guide
Find your home in the picker below — by era and description, not exact year. Each style shows the honest constraints we see in that housing stock, the system that fits most homes like it, an alternative worth comparing, the electrical-and-plumbing note that usually rides along, and the deeper guides to read before you get quotes.
How it works
The pattern behind the picker
Every recommendation below follows the same logic: use what the house already has when it's sound (existing ducts in a two-story, a healthy panel), don't fight the house when it isn't (no ducts in plaster walls means ductless, not demolition), size to the actual rooms rather than the nameplate, and sequence the enabling work — panel capacity, duct sealing, water heater placement — before the shiny equipment. That order is what separates retrofits that work from retrofits that disappoint.
Where the trades overlap
Comfort projects in Seattle homes almost always touch the other two trades: electrification needs panel headroom, ADUs need circuits and hot water, mechanical closets are shared between air handlers and water heaters, and 'one cold room' is sometimes a circuit or airflow problem rather than an equipment problem. That overlap is why the picker's guidance includes the tri-trade note — and why one whole-home assessment beats three separate service calls.
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.
Buying equipment before checking the house
The most common retrofit mistake: choosing a system from a brochure, then discovering the panel needs an upgrade, the ducts leak, or the closet is four inches too small. The house always gets a vote — measuring first (load calculation, duct test, panel assessment) turns surprises into line items you can plan for.
Treating this guide as a spec
It isn't one. Styles blur — plenty of remodeled Craftsmans have modern ducts, and some 1990s townhomes hide pre-war-grade quirks. The picker tells you what usually fits and what questions to ask; the in-home assessment tells you what your house actually needs.
How we build this guidance
- Patterns drawn from retrofit work across Seattle's real housing stock — pre-war plaster homes, mid-century ramblers, suburban two-stories, townhomes, and the ADU boom.
- Tri-trade view: the same visit assesses comfort systems, panel capacity, and plumbing so nothing gets promised the house can't support.
- Hedged, honest guidance — no invented counts, prices, or one-size answers; every path ends in a real load calculation.
Methodology: Style patterns reflect Seattle-area housing stock and the retrofit work Eco performs across all three trades; recommendations are general guidance and every project is confirmed with an in-home load calculation, duct evaluation, and panel assessment.
Last updated: 2026-07-03
Ready for the next step?
When you're ready to move forward, explore your options or book service with upfront pricing.
Continue exploring
Common questions
My home doesn't match any of the six styles — now what?
The styles are patterns, not boxes. Mixed and remodeled homes usually combine two patterns (a Craftsman with a 1990s addition behaves like both), and the guidance still applies piecewise. When in doubt, the in-home assessment answers it for your actual house.
Do older Seattle homes really need a panel upgrade for a heat pump?
Often, but not always — pre-war homes commonly run 60–100 amp panels, and whether a heat pump fits depends on a load calculation, not the panel label alone. Load-management devices and right-sized equipment sometimes avoid the upgrade; sometimes the upgrade is genuinely step one. We tell you which honestly.
Is ductless a downgrade compared to central air?
No — it's a different delivery method for the same heat pump technology, and in homes without usable ducts it's the better engineering answer, not the compromise. Room-by-room control is a genuine upgrade for many households. Where good ducts exist, ducted systems keep the vents you're used to — that's the real trade-off.
Can Eco handle the electrical and plumbing parts too?
Yes — that's the point of the tri-trade notes. Panel upgrades, new circuits, subpanels for ADUs, water heater replacement and relocation, and the comfort system itself are all licensed Eco work, coordinated in one project instead of three contractors pointing at each other.