HVAC machinery is a term used to describe the equipment used to provide heating, ventilation, and air conditioning in a home or commercial building. This type of machinery is designed to regulate the temperature, humidity, and air quality of the space, as well as provide ventilation and air circulation. HVAC systems are typically composed of a furnace, air conditioner, and other components such as a heat pump, humidifier, and air filter. The furnace is responsible for providing heat to the space, while the air conditioner cools the air. The other components are used to regulate the air quality, humidity, and air circulation. HVAC systems are essential for providing a comfortable and healthy environment in any home or commercial building.