Core Viewpoint - The article discusses common misconceptions and practices related to heating systems in China, highlighting the inefficiencies and health risks associated with improper use of heating equipment and methods. Group 1: Heating Practices and Misconceptions - Using radiators to dry wet clothes is inefficient and leads to energy waste, as it creates an insulating barrier that hinders heat transfer and consumes energy through evaporation [2][3] - Covering radiators with wet clothes can create a high-humidity environment conducive to the growth of bacteria and mold, posing health risks [2][3] - The recommended indoor humidity during heating season is between 40% and 60%, but using wet clothes can cause fluctuations that may lead to health issues [3] Group 2: Energy Efficiency in Heating - Turning off heating systems when leaving home is often believed to save energy, but maintaining a low temperature (12-16 degrees Celsius) is more energy-efficient than frequent on-off cycles [4][5] - Restarting heating systems after being turned off requires significantly more energy to reheat the space and the thermal mass of walls and furniture, potentially consuming 2 to 3 times more energy [4][5] - For short absences, lowering the heating temperature by 2 to 3 degrees Celsius is advised instead of turning off the system completely [6] Group 3: Common Errors in Heating System Maintenance - The belief that releasing water from radiators will improve heating is a misconception; it can disrupt the heating system and lead to colder indoor temperatures [7][8] - Proper maintenance involves checking for air blockages and ensuring filters are clean, rather than releasing water [7][8] Group 4: Health Risks of Improper Heating Water Use - Using heating water for cleaning or flushing toilets is hazardous, as it contains chemicals that can harm skin and respiratory health [9][10] - Heating water is not suitable for direct contact due to its high pH and potential presence of harmful substances, including heavy metals and antifreeze agents [9][10] - Unauthorized use of heating water is a violation of regulations and can result in fines and penalties [10]