Rental apartments (for residing, while traveling, etc.) are sometimes equipped with household furniture and appliances such as refrigerators, mattresses, utensils, and so on. What is the ruling of ritual purity when it comes to these items, especially when we know that the previous tenant or guest in most cases is not a Muslim, such as someone from the people of the book, a Buddhist, a Hindu, or even someone without a religion, who does not believe in the existence of God, prophets, and messengers?
They should consider everything pure as long as they do not know for certain, or have contentment, that the item has become mutanajjis (i.e., ritually impure due to contact). Strong presumption (dhan) of the ritual impurity of something should be disregarded.