Many people are choosing to invest in outdoor heaters because they provide the opportunity to socialize outdoors all year round. Outdoor heaters are safe, quiet and affordable and are available in a number of designer colors. Outdoor heaters typically use either propane or natural gas, and can generate up to 50,000 BTUs of heat, providing warmth for a 20-foot diameter area. Outdoor heater prices start at around $200 online, but can cost up to $1000 depending for more elaborate styles and designs. Outdoor heaters have become popular at restaurants and bars with outdoor patios as they provide customers with the option of dining and smoking outdoors.