DOI: https://doi.org/10.70098/OUAN6240

Mepsy is CLASP’s appliance and equipment climate impact calculator. It’s designed for policymakers, researchers, and other industry stakeholders to model different policy scenarios and measure their impact.

Mepsy uses a “bottom-up” accounting approach, considering the number of appliances in use in a country, the energy performance of representative products, the climate-intensity of the local power grid, and other variables to analyze the electricity use, carbon dioxide emissions, and consumer energy costs associated with a given policy scenario.

Wherever possible, the calculator references precise stock, sales, and energy performance data from recent CLASP in-country market studies, or country-level estimates from reputable market research firms. Where country-level data for a particular product are not available, calculations are based on estimates from regional or global averages, accounting for differences in country population, economics, or climate as relevant to a particular appliance. Future and past shipments are extrapolated based on recent trends.

The Mepsy Methodology outlines all underlying calculations and data sources behind the tool. For appliance-specific data for each of the ten appliances featured on Mepsy, please refer to the respective technical appendix:

• Air conditioning
• Beverage cooler
• Distribution transformer
• Fans
• Lighting
• Motors
• Refrigerator
• Space heater
• Television
• Water heater

In addition, the annex “Extending Mepsy to 2050” details the methodology behind projecting Mepsy’s insights through 2050, including key assumptions, modeling approaches, and data sources used in this effort.

To learn more about Mepsy or use our free tool, click here.