Higher scores indicate an easier, lower-cost climate for maintaining the reference plunge at 50°F.
Cooling burden through the year
Monthly values use NOAA 1991–2020 normals when available. Costs use the latest state residential rate loaded from EIA or the bundled fallback rate.
What this means in Minneapolis
The reference model assumes a covered, insulated 100-gallon outdoor plunge maintained at 50°F, with continuous low-power circulation and a chiller operating at an assumed coefficient of performance. It is designed for city-to-city comparison, not to predict the exact power draw of a specific product.
Cold-weather operation may require freeze protection, winterization, or equipment rated for freezing conditions.