Air handler manufacturers are responsible for producing air handlers, which are a type of equipment used to condition and circulate air in a building. Air handlers typically consist of a blower, heating and cooling elements, filter racks or chambers, sound attenuators, and dampers. The blower is used to move air through the system, while the heating and cooling elements are used to regulate the temperature of the air. Filter racks or chambers are used to remove dust, pollen, and other airborne particles from the air. Sound attenuators are used to reduce the noise of the system, while dampers are used to control the flow of air. Air handlers are typically used in residential and commercial HVAC systems, and they are designed to be energy efficient and reliable. Air handler manufacturers must ensure that their products meet industry standards and regulations, and they must also ensure that their products are safe and reliable.