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Sizing a heat pump for this county is not a task a contractor can do from a catalog. The outdoor coil and the refrigerant circuit are the parts doing real work when temperatures drop, and a system undersized at installation runs those parts harder and longer before the thermostat is satisfied. Homes in Tillamook County, OR run heat about ten months a year, from September through June. That puts the load calculation and the backup heat decision at the front of any quote here, because a contactor or reversing valve that cycles through most of the calendar accumulates wear a milder or shorter season would slow.
Ductwork laid out for a furnace or older system does not automatically carry a heat pump the way the original design intended. A contractor quoting a heat pump installation here will open walls or pull registers to see what the existing ducts actually handle before pricing the equipment itself. Half the homes in Tillamook County, Oregon were built in 1980 or earlier (2020-2024 ACS 5-year). That share of the housing stock was ducted for something else, which means the duct layout, sizing, and condition shape the job as much as the unit selected does. Electrical service gets the same look, since the panel has to support what the new equipment draws.
What Gets Installed With a New Heat Pump
The outdoor unit is the piece most homeowners notice first. It sits on a pad beside the house and holds the compressor and the outdoor coil, which together do the main work of moving heat between the refrigerant and the outside air. Inside, the air handler mounts in a utility space, a closet, or an attic and pushes conditioned air through the home.
A refrigerant line set runs between the two units, carrying refrigerant back and forth through insulated copper tubing. A thermostat goes on an interior wall and gives the homeowner control over the whole system. Some installations also include a supplemental electric resistance element inside the air handler for the coldest days.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines exactly how each piece applies to your house.
Get matched in Tillamook CountyTillamook County, by the numbers
10 severe weather events were recorded in Tillamook County, Oregon between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Tillamook County, Oregon were built in 1980 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesTillamook County, Oregon holds 19,213 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 74.3% of the occupied homes in Tillamook County, Oregon (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Behind Heat Pump Installation in Tillamook County, Oregon2 sourced rules and standards
Contractor Rules in Tillamook County, Oregon
Oregon’s contractor licence does not reach casual, minor or inconsequential work on one structure where the person’s contracts total less than $1,000 — and the exemption is unavailable to anyone who advertises or signs themselves as a contractor, at any price.
Oregon requires a current Construction Contractors Board licence, with the right endorsement, to undertake, offer to undertake or bid construction work.