In cold-climate regions of developing countries, access to a reliable and affordable heat supply is critical to the well-being of the rural and peri-urban poor, who enjoy only limited access to district heating, natural gas, and electricity networks. Most of them have long relied on solid fuel-fired, traditional heating stoves or simple low-pressure boilers (LPBs), which are fuel-inefficient, leaky, and highly polluting both indoors and outside. Having access to high-efficiency, low-emissions (HELE) heating stoves offers under-served households a cost-effective, intermediate solution until fuel-switching to gas or electricity is possible. Recent World Bank- supported winter heating pilot programs in the Central Asian countries of Tajikistan and Kyrgyzstan brought to market a small number of advanced, solid fuel-fired space heating and cooking stoves. This technical report aims to document the Central Asia pilot experience with HELE heating technologies and their potential use as a cost-effective, intermediate solution for millions of underserved households for improving health and reducing household air pollution, energy poverty, and climate impacts.