A variable volume, variable temperature (VVVT) air handling unit (AHU) is a type of HVAC system that is designed to adjust both the volume of air being distributed and the temperature of the air based on the heating and cooling needs of the space being served. VVVT AHUs are typically used in systems where the heating and cooling needs of a space can vary significantly over time, such as in office buildings or schools.

In a VVVT AHU, the air is drawn into the AHU and passed through a filter to remove contaminants and impurities. The air is then conditioned using a heating, ventilation, and air conditioning (HVAC) system, which regulates the temperature and humidity of the air. The conditioned air is then distributed to the space being served by the AHU through a network of air ducts.

VVVT AHUs typically have a number of features and components to help condition and distribute the air, including filters to remove contaminants and impurities, heating and cooling elements to regulate temperature, and humidity control systems to regulate humidity.

VVVT AHUs are typically controlled by a central HVAC controller or thermostat, which monitors and adjusts the temperature and humidity of the air being distributed by the AHU. The controller or thermostat may also be used to control the flow of air to the space being served, depending on the needs of the space and the system configuration. To adjust the volume and temperature of the air being distributed, VVVT AHUs use a combination of dampers and heating and cooling elements to vary the amount of air being distributed and the temperature of the air.

• VVVT AHUs are typically used in systems where the heating and cooling needs of a space can vary significantly over time, such as in office buildings or schools.
• In a VVVT AHU, the air is conditioned using a heating, ventilation, and air conditioning (HVAC) system, which regulates the temperature and humidity of the air. The conditioned air is then distributed to the space being served by the AHU through a network of air ducts.
• VVVT AHUs typically have a number of features and components to help condition and distribute the air, including filters to remove contaminants and impurities, heating and cooling elements to regulate temperature, and humidity control systems to regulate humidity.
• VVVT AHUs are typically controlled by a central HVAC controller or thermostat, which monitors and adjusts the temperature and humidity of the air being distributed by the AHU. The controller or thermostat may also be used to control the flow of air to the space being served, depending on the needs of the space and the system configuration.
• To adjust the volume and temperature of the air being distributed, VVVT AHUs use a combination of dampers and heating and cooling elements to vary the amount of air being distributed and the temperature of the air. The position of the dampers and the operation of the heating and cooling elements are typically controlled by a VAV controller, which receives signals from temperature sensors in the space and adjusts the dampers and heating and cooling elements as needed to maintain the desired temperature.
• VVVT AHUs are typically more energy efficient than constant volume AHUs, as they can adjust the volume and temperature of the air being distributed to match the changing heating and cooling needs of the space. This can help to reduce the amount of energy needed to condition and distribute the air, which can result in significant energy savings over time.