Proper installation is crucial for safety and optimal performance. * Maintenance: * Regular maintenance, including cleaning and ash removal, is necessary. * Emissions: * It is important to consider the smoke emmited from these devices. Where They're Common: * These heaters are particularly prevalent in regions where wood is abundant and where access to conventional energy sources is limited. India is a place where they are manufactured and used. If you're considering a wood-fired water heater, it's essential to research specific models, installation requirements, and local regulations regarding wood burning.