Spokane WA Heat Pump Installation is a heat pump contractor providing heat pump installation 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.
Installing a heat pump properly is three quarters preparation and one quarter equipment. Before anything is ordered we run an ACCA Manual J load calculation on the actual house, select equipment under Manual S from the manufacturer's expanded performance data, and check the duct design against Manual D if the system is ducted. On the day, refrigerant joints are brazed under flowing nitrogen, the system is pressure tested, evacuated to a deep vacuum and charged by weight. Most residential installations run one to two days.
Every load calculation starts from an indoor design temperature, normally 70°F for heating, and works out the heat loss to Spokane's winter design condition. Change that indoor number and the whole calculation moves, which is why it goes on the paperwork.
The parts of an installation that determine how long the system lasts are mostly finished before the panels go back on.
Nitrogen purging during brazing is invisible in the finished job and matters enormously. Without it, brazing copper produces a black flaking oxide scale on the inside of the pipe, and that scale eventually travels into the compressor and the metering device. It is the kind of shortcut nobody can see on handover day and everybody pays for in year six. We do it on every joint and we are happy to be watched doing it.
Size the new system to match whatever came out, braze the joints in open air, charge until the pressures look about right and leave.
Calculate the actual load, braze under nitrogen, pull a documented deep vacuum with a decay test, and weigh the charge in against the manufacturer's figure.
Manual J is a room by room heat loss and heat gain calculation using the actual construction of your house: insulation levels, window area and orientation, air leakage, and Spokane's design conditions. It produces a number in BTU per hour rather than a tonnage guess, and it is common for the result to be meaningfully smaller than the equipment being replaced, because older systems were routinely oversized.
Manual S then selects equipment against that load using the manufacturer's expanded performance data at the relevant outdoor temperatures. This is the step that gets skipped most often, and it is the one that determines whether the system holds capacity when Spokane drops to 5°F. Both documents go to you with the finished job.
Installation pricing is driven by system capacity, efficiency tier, and how much of the existing infrastructure can be reused. Ductwork, electrical supply and the equipment location are the three variables that move a quote most.
We itemise the quote so equipment, labour and any infrastructure work appear separately. If your panel needs a circuit added, or the duct needs modification, that shows as its own line rather than being folded into a single number you cannot interrogate.
We measure the house, run a room by room Manual J, and check the electrical supply and duct system against what the result requires.
Equipment is selected under Manual S from low-temperature performance data, and the quote itemises equipment, labour and any infrastructure work.
Old equipment is removed with refrigerant properly recovered, new equipment is set, and refrigerant joints are brazed under flowing nitrogen.
The system is pressure tested, evacuated to 500 microns with a decay test, charged by weight, and the commissioning figures are recorded for you.
Installation day involves moving substantial equipment in and out, plus electrical and refrigerant work at both ends of the system.
Every installation starts from the same design conditions. Our Spokane heat pump sizing and climate guide explains the Climate Zone 5B figures the load calculation uses and why the old rule of thumb approach no longer passes inspection. Read the guide.
Call for a load calculation and an itemised quote. You keep the numbers either way.
Request a quote