First: nobody is making you buy one
No. Section N1105.8 of the 2026 Oregon Residential Specialty Code applies to new dwellings where split-system air-conditioning is installed. The Building Codes Division's own technical summary says it “is for new dwellings only and does not apply to the replacement (alteration) of an existing cooling system,” and that it “does not dictate the heating system fuel for the home.” If a quote for a replacement is built around “the state requires a heat pump now,” ask which code section requires it for your replacement. The full code language is here.
A heat pump may well be the right choice for your house. It should be your choice, made on cost, comfort and running cost — not on a code section that does not apply to you.
Ducted or ductless — what each suits
A ducted (central) heat pump uses your existing ductwork: an outdoor unit, an indoor air handler or coil, and the ducts you already have. It is the like-for-like replacement for a furnace-and-AC pair, and it is the cheap version only if the ducts are adequate. Undersized returns and leaky runs are where thousands of dollars appear in a quote.
A ductless mini-split pairs an outdoor unit with one or more wall or ceiling heads, each serving a zone. It suits homes without ducts, additions, converted garages and rooms that never heat or cool properly. It does not need duct work and it does not fix bad ducts elsewhere in the house.
Energy Trust of Oregon's equipment conditions are a useful floor for either type, whether or not you qualify for the money: a ductless system must be inverter-driven with an HSPF2 of 8.10 or greater, with the highest-capacity indoor head serving the main living space; a ducted system needs an HSPF2 of 7.50 or greater and, where electric auxiliary heat is present, a thermostat lockout set to 35°F or lower so the strip heat does not run when the heat pump could.
Cold weather: the rating that matters
The question everyone asks is whether a heat pump keeps up in a Portland-metro winter. The answer lives in one number that most quotes leave out: the coefficient of performance (COP) at 5°F, and the share of rated capacity the unit still delivers at that temperature. The extended-capacity tier that Energy Trust incentivises is defined by the 2025 CEE Tier 1 Path A criteria: SEER2 ≥16.0, EER2 ≥9.8, HSPF2 ≥8.5, COP at 5°F ≥1.75, and a capacity ratio of at least 60% at 5°F versus 47°F. Ask for those figures for the exact model on the quote.
How much that number matters depends on where in Oregon the house is. NOAA's 1991–2020 climate normals count an average of 0.0 nights a year at or below 10°F at Portland airport, against 8.9 at Bend and 11.1 at Redmond. West of the Cascades the 5°F rating is insurance; in Central Oregon it is the specification. The regional pages set out the station figures: Bend, Salem, Eugene, Medford.
Every heat pump also has a backup. The 2026 code language itself describes the arrangement: heat pump operation is first-stage heating, and “the heat source sized for the dwelling design-day heating load provides heating where first stage heating cannot maintain the minimum required space temperature.” That backup can be electric resistance strips or an existing gas furnace — the dual-fuel (hybrid) arrangement, where the furnace takes over below a set-point temperature. Ask what the backup is, and at what outdoor temperature it takes over, because that decides your winter bill.
What it costs
Angi's Portland figure for a heat pump is $4,763–$9,116, average $6,915. A 2026 national guide quotes $12,000–$18,000 installed for a ducted whole-home system, and $3,500–$8,000 for a one- or two-zone ductless system. The gap between the Angi average and the national range is mostly whether duct modification, a dedicated circuit or a panel upgrade, permit and haul-away are inside the number. The full table, and how to read a quote that looks too good, is here.
Rebates: check the fuel you have now, not the equipment you want
The federal credit is gone. Public Law 119-21, signed 4 July 2025, ended the section 25C and 25D credits for property placed in service after 31 December 2025. Energy Trust of Oregon incentives are real — $800 for a ductless heat pump, $1,000 ducted, $1,000 extended-capacity for an owner-occupied single-family home served by Portland General Electric or Pacific Power, effective 1 January 2026 — but they require the heat pump to replace electric resistance heat or an electric forced-air furnace, and the ducted and extended-capacity tiers say it cannot have a backup gas heating system. A home heated by a gas furnace today qualifies for none of it. The state's HP3 owner-occupied funding is fully reserved and HEAR has not opened. The full 2026 picture, with the program documents it was checked against, is here.
Questions to put to a contractor
- What is your CCB number? Check it — license status, bond, insurance and years trading take about eight seconds.
- Which model numbers, exactly — outdoor unit and indoor unit — and what are the HSPF2, SEER2 and COP-at-5°F figures for that pairing?
- Was a load calculation done for this house? Manual J is the ACCA residential load-calculation standard. Sizing to the old unit's nameplate, or to square footage alone, is a guess.
- What is the backup heat, and at what temperature does it take over?
- Does my electrical panel have the capacity? A dedicated circuit is normal; a panel upgrade is a separate trade and a separate permit, and a common line to find missing from a low quote.
- What is the total installed price with permit, electrical, duct changes and removal of the old equipment included?
- What is the labor warranty, and for how long? Manufacturer parts warranties are near-identical between brands; labor warranties are where installers differ.
If you already have one
A light frost on the outdoor unit that clears during the defrost cycle is normal in a wet Oregon winter; a unit frozen solid for hours is not. Auxiliary or emergency heat running in mild weather is worth a look, because it is the expensive way to heat a house. The troubleshooting guide covers what is normal, what you can check, and what needs a technician.
Nearby
Local pages for the Clackamas County market, each with the licensed contractors registered in that city:
Sources. Cost ranges are quoted from the published 2026 guides named on the cost page (Angi Portland; Costadia Portland 2026; a 2026 national guide), as verified there on 23 September 2026. Incentive figures and equipment conditions are from Energy Trust of Oregon information sheets PI 0320I v2026.5 and PI 0320I-HP v2026.4 (both revised 9 September 2026), IRS guidance on Public Law 119-21, and Oregon Department of Energy program pages, as verified on the rebate page. Code language is quoted from the Oregon Building Codes Division technical summary First-Stage Heat Pump — 2026 ORSC Provisions Summary. License facts are from the State of Oregon CCB Active Licenses open dataset g77e-6bhs. This page is general information, not a bid, a code ruling or tax advice.