Spokane WA Heat Pump Installation is a heat pump contractor providing central heat pump systems for homeowners and property owners across Spokane County, WA and out to the Idaho state line. Every job starts from a load calculation rather than the size of whatever came out.
A central heat pump is a split system: an outdoor section containing the compressor and outdoor coil, and an indoor air handler containing the blower and indoor coil, connected by a refrigerant line set. The two halves have to be a certified matched pair, because the published efficiency and capacity numbers only apply to the specific combination that was tested together. Mixing an outdoor unit with whatever indoor coil happens to be in stock produces a system with no valid rating at all. Most central changeouts take one to two days.
Published heating capacity is measured at 47°F outdoor temperature. Spokane's design condition is far colder than that, which is why we read the expanded performance tables at 17°F and 5°F rather than quoting the headline number.
Central systems are the default for houses that already have ducts, and the difference between a good one and a poor one is mostly in the commissioning.
Reusing an existing line set on a central changeout is a decision that deserves more scrutiny than it usually gets. If the old system used a different refrigerant, or failed with a burnout, the residual oil and contamination in that line set will damage the new compressor. Line set diameter also has to suit the new equipment, and it is not always the same. We inspect, flush or replace as the situation requires and we tell you which of those three we are doing and why.
Swap the outdoor unit, leave the indoor coil and line set alone, and hand over a system whose real efficiency nobody has ever verified.
Specify a certified matched pair, record the AHRI reference on the paperwork, and either replace the line set or document why the existing one is suitable.
Central systems are sized from a whole-house ACCA Manual J load calculation, then equipment is selected under Manual S using the manufacturer's expanded performance data. Because heating loads in Spokane dominate cooling loads, the selection usually gets driven by the winter condition, and the resulting equipment is often larger in cooling capacity than a cooling-only calculation would suggest.
That creates a real tension. A unit sized to cover the full heating load at 5°F may be oversized for the July cooling load, which hurts humidity control. Modern variable-speed equipment resolves most of this by turning down, which is one of the practical reasons we specify inverter-driven systems for Spokane rather than single-stage units.
Central system pricing is driven by capacity, the efficiency tier you choose, and whether the indoor section can stay in its existing position. A straight changeout in the same location is the least expensive path. Relocating the air handler, changing from a horizontal to a vertical configuration, or adding a new condensate route all add scope.
Replacing only the outdoor unit is occasionally proposed as a cheaper option. We will explain why that produces an unmatched, unrated system, and we would rather lose the job than install one.
A whole-house Manual J establishes the actual heating and cooling loads rather than working from the size of the outgoing equipment.
Indoor and outdoor sections are chosen as a certified pair under Manual S, and the AHRI reference goes on your quote.
Old refrigerant is recovered, the old sections come out, the line set is replaced or verified, and the new pair is installed and brazed under nitrogen.
The system is evacuated, charged to the manufacturer's subcooling target, and airflow and temperature split are verified in both heating and cooling.
A central changeout involves both the outdoor unit and the indoor air handler, so both ends need to be reachable on the day.
New central systems now ship with A2L refrigerants rather than R-410A. Our A2L refrigerant guide explains what changed, what it means for servicing, and why it matters when you are choosing between a current model and old stock. Read the guide.
Call for a load calculation and an itemised quote. You keep the numbers either way.
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