There are many ways to warm the RV overnight in winter, including air conditioning, oil/gas/electric heating system and floor heating system. Even in theory, household electric oil and small sun can be used. RV, also known as "home on wheels", has two functions, namely "house" and "car", but its attribute is still a car, and it is a mobile vehicle equipped with necessary facilities for home. RV is a fashionable facility car imported from abroad. Its home facilities include bedding, stoves, refrigerators, cabinets, sofas, dining tables and chairs, toilet facilities, air conditioners, televisions, stereos and other furniture and electrical appliances, which can be divided into driving area, living area, bedroom area, sanitary area and kitchen area. RV is a collection of "food, clothing, housing and transportation".