Energy poverty, i.e., inefficient heating and insufficient access to energy services, can turn a shelter into a health hazard. We find that substandard housing and ineffective heating is associated with a higher risk of poor health in an urban context. We surveyed people living in two middle-sized cities in a coal-dependent region of Poland and used objective and subjective indicators of energy poverty and self-assessed health status. We demonstrate that people who live in substandard housing are more likely to exhibit poor musculoskeletal and cardiovascular outcomes, by 10 and 6 pp, respectively than otherwise similar people living in suitable housing conditions. We show that energy-poor people who use coal or a wood stove have a 24 pp higher likelihood of respiratory disease than the energy-poor who live in flats connected to district heating. We also find that a significant amount of the explained variance in the probability of respiratory disease is attributable to energy poverty. To improve the housing conditions and reduce the risk of poor health outcomes, we recommend two policy instruments: 1) a full subsidy for thermal retrofits and connecting multi-family buildings to the district heating network and 2) a targeted energy voucher for clean heating.