Carbon monoxide poisoning is one of the most dangerous hidden risks in daily life. Carbon monoxide is colorless and odorless, so families often cannot detect it without professional protection. That is why carbon monoxide poisoning prevention should never depend on human senses alone. The safer solution is to combine correct appliance use, proper ventilation, and a reliable fire and monoxide alarm. For families, the first step is to avoid outdated or unsafe water heaters. Obsolete flue-type water heaters and direct-discharge water heaters may create serious safety hazards in enclosed spaces. In winter, many people close doors and windows tightly during showers to keep warm, but poor ventilation can increase indoor risk. A safer home starts with properly installed equipment and better air circulation. The second step is to use coal fires more carefully. If coal heating is still necessary, the room should include practical safety devices such as small ventilation windows and a properly installed chimney. Families should never ignore airflow when using indoor heating equipment. A reasonable chimney design and clear exhaust path can reduce the chance of dangerous gas accumulation. Understanding possible symptoms of carbon monoxide poisoning is also important, because early awareness can help people respond faster......