A heating system is a mechanism for maintaining temperatures at an acceptable level. It uses thermal energy to heat a home, office, or other dwelling. The system may be central heating, meaning the thermal energy is produced in one central location and distributed throughout the building. Or, the system may be distributed, meaning the thermal energy is produced in multiple locations and then distributed. Often, the heating system is part of an HVAC (heating, ventilation, air conditioning) system. This type of system regulates the temperature, humidity, and air quality within a building. The HVAC system may include a furnace, heat pump, or boiler to produce the thermal energy; and then distribute it through ductwork or radiant flooring. By using a heating system, occupants of a home or office can maintain comfortable temperatures indoors regardless of the weather outdoors.