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Cold-climate heat pumps for South Dakota

Across the 375 ZIP-code areas in South Dakota, the winter design temperature runs from −10°F to −2°F for most areas, with a median of −5°F.

The design temperature is the annual 99% value: only the coldest 88 hours of an average year fall below it. Each area takes it from the nearest weather station, 2015 to 2024.

Winter design temperatures across South Dakota

ZIP-code areas in South Dakota, by design temperature
Design temperature Areas Share
Below 5°FNo certified heating figure 375 100%
5 to 17°F 0 0%
17 to 47°F 0 0%
47°F and above 0 0%
Coldest areas in South Dakota
Place ZIP code Design temperature
Bowdle 57428 −12°F
Eureka 57437 −12°F
Hosmer 57448 −12°F
Warmest areas in South Dakota
Place ZIP code Design temperature
Jefferson 57038 −1°F
North Sioux City 57049 −1°F
Fairfax 57335 −2°F

Sizes certified to cover a typical house at −5°F

The size calculator uses 22 to 38 Btu/h per square foot for a typical house where the design temperature is below 0°F. Below 5°F the certified data has no figure. Sizes are compared on the 5°F full-speed test.

For each type: the smallest size class whose median model is certified to deliver the bottom of the range at 5°F, and the smallest that reaches the top. The medians count one value per model. Size classes are named by cooling capacity.

1,500 sq ft: 33,000 to 57,000 Btu/h

2,500 sq ft: 55,000 to 95,000 Btu/h

No single size class has a median model certified for 55,000 Btu/h at 5°F. A load this size is normally met by more than one system, or by zones.

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6,618 of 8,420 certified units carry EPA's cold-climate designation. Cold-climate heat pumps by size

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