Heat Pump Payback in Post Falls, ID
Should Post Falls switch to a heat pump?
Post Falls is a place where a heat pump genuinely costs more to operate than the alternative. Against a like-for-like gas furnace and AC swap, going electric costs $5,500 more up front here. Unfortunately the electric bill outweighs the gas bill it replaces by about $250 a year here, so the extra spend stays unrecovered. That's Post Falls's own climate and rates talking, not a hedge or a caveat.
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Landed on Post Falls by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
Post Falls's weather, in the numbers that matter
Degree days tell the story here: Post Falls racks up 6151 heating degree days each year (base 65°F), and summers add a moderate cooling load, with 556 cooling degree days on the cooling side. The 99% winter design temperature here, the cold snap equipment must be sized for, not the seasonal average, is -7.6°F, and the coldest daily reading in the 2024 station record was -15°F. That puts the seasonal coefficient of performance at 2.52 for the recommended cold-climate unit. Below the 25°F line where a standard machine starts leaning on resistance backup, Post Falls sits firmly in cold-climate territory, so that's the class of unit priced here. These numbers come from Coeur D'Alene Air Term Apt, the closest NOAA station, 6.6 miles out.
What it actually costs to run, year to year
A 2000-square-foot house here would pull roughly 6,181 heating kilowatt-hours annually on top of cooling, totalling about $833 a year on electricity. Post Falls's gas rate of $7.69 per Mcf, applied to the 64 Mcf a year the furnace burns, puts the current furnace-and-AC running cost near $583 a year, against 12.52¢ per kWh for electricity. Because the heat pump costs more to run here, the gap only widens with time: $9,255 behind after 15 years compared with replacing the furnace and AC like-for-like.
The break-even point in Post Falls
For the verdict in Post Falls to flip, electricity would need to drop to about 8.3¢/kWh from 12.52¢, or gas climb past $11.60 per Mcf from $7.69. A utility offering a lower heat pump rate can change this. Until then, no quote price makes a heat pump pay back against gas in Post Falls; the case for one here rests on comfort, cooling, or replacing electric heat instead.
The other scenario: no gas furnace to begin with
Gas isn't universal in Post Falls, many houses run on electric heat already. Swap the comparison to resistance heat instead of gas, and Post Falls's answer improves. About $1,207 a year comes back this way, enough that the 8.3-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Post Falls ranks in this dataset
Among 3206 cities, Post Falls's winter puts it at rank 171 for severity, while its size puts it at rank 895 for population, 1 in both cases being the extreme. That's the coldest third of the dataset, where climate does most of the work behind this figure.
What to do with this number in Post Falls
Post Falls, Idaho is home to about 45,800 people, and the figures above are the same ones a local HVAC contractor uses to size and quote a system, this site doesn't guess where a real quote would land, it just tells you whether it's worth asking for one. In Post Falls, nothing is lost by holding off until the current equipment genuinely fails.
Line up a few local HVAC quotes before you decide.
Where Post Falls's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Post Falls's 2.52 seasonal COP and payback figure. At a -7.6°F design temperature, Post Falls sits in cold-climate territory; the guide to that class of unit explains why.