All Mill panel heaters have an IPX4 certification and are approved for use in bathroom zone 2. Therefore, they can be safely used in a bathroom. Other types of heaters do not have this certification and should not be used in wet rooms. Related ArticlesCan the Mill Sense be used in bathrooms?Can Wi-Fi Socket be used in bathrooms?Can I use my Mill-devices outdoors?What is the difference between Mill steel and Mill glass panel heaters?