In order to determine the energy, economic and emissions avoided contribution of Domestic Solar Water Heating Systems based on the Thermosyphon Principle (DSWHS-TP) in a country, a detailed methodology was designed. The methodology was applied to three countries (Mexico, Costa Rica, and Democratic Republic of the Congo (DRC)) to show its versatility. Results showed that the annual average energy supplied by a DSWHS-TP (150 L with a collector gross area of 2 m²) in Mexico, Costa Rica, and DRC is 5.27, 4.15, and 4.67 GJ, respectively, which represents a solar fraction of 86.6, 98.9, and 76.1%. Consequently, annual money savings of 428, 249, and 614 USD, respectively could be realized. The CO₂ avoided emissions are affected by the conventional energy source used to heat water. Costa Rica and DRC have an annual average of CO₂ avoided emissions per house of 0.049 and 0.006 tons due to the use of electricity produced largely by renewable energy sources compared to Mexico with 0.55 tons of CO₂ per house due to the use of the Liquefied Petroleum Gas. Hence, the methodology presented can be an essential tool to establish the benefits of using DSWHS-TP and the avoided emissions of CO₂ in the environment.

为了确定一个国家基于热虹吸原理（DSWHS-TP）的家用太阳能热水系统在能源，经济和排放方面所避免的贡献，设计了一种详细的方法。该方法已应用于三个国家（墨西哥，哥斯达黎加和刚果民主共和国（DRC））以展示其多功能性。结果表明，在墨西哥，哥斯达黎加和DRC的DSWHS-TP（150 L，集热器总面积为2 m ²）的年平均能量分别为5.27、4.15和4.67 GJ，这代表了太阳能的一部分分别为86.6、98.9和76.1％。因此，每年可分别节省428、249和614美元。一氧化碳₂避免的排放受到用于加热水的常规能源的影响。哥斯达黎加和DRC具有平均每年的CO ₂避免每0.049和0.006吨房子排放由于相比于墨西哥0.55吨二氧化碳的可再生能源在很大程度上产生的电力使用₂每家由于使用液化的石油气。因此，提出的方法可能是建立使用DSWHS-TP的好处以及避免环境中CO ₂排放的重要工具。