Whats the difference between a CAV and a VAV?

While a CAV system uses variable air temperature and constant airflow, a VAV system keeps constant temperature and variable airflow.

What is the difference between VAV and VVT?

VAV systems use variable frequency drives to slow the supply fan speed when the dampers in the boxes close. VVT systems maintain a bypass between the supply and return ducts to the unit, meaning that the fan runs full tilt regardless of whether the VVT boxes are fully open or averaging 20\% open.

What is a CAV?

From Wikipedia, the free encyclopedia. Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning (HVAC) system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space.

What is the CAV?

Constant air volume (CAV) is a type of heating, ventilating, and air-conditioning (HVAC) system. In a simple CAV system, the supply air flow rate is constant, but the supply air temperature is varied to meet the thermal loads of a space. Most CAV systems are small, and serve a single thermal zone.

What is VAV electrical?

Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system. The simplest VAV system incorporates one supply duct that, when in cooling mode, distributes approximately 55 °F (13 °C) supply air.

What is the difference between a vav and a VCD?

Answer Wiki. Both VAV and VCD are used to adjust/control the volume of air/ airflow through a branch of duct. VCDs are placed b/w 2 ducts or at a branch. VCDs usually have a handle with which we can open, close and regulate the damper blades/ louvers to resist / allow the flow of air through it.

What is the difference between a CAV and VAV system?

Ventilation systems can be classified into constant air volume (CAV) and variable air volume (VAV) systems, and this article will compare both types. CAV systems supply a constant airflow at variable temperature. VAV systems supply a variable airflow at constant temperature.

How does a motorised VCD work?

Motorised VCDs are also used in which an actuator open and close the damper. In the case of VAV, air flow through the branches are controlled by the VAV itself. Manual adjusting / closing of the damper is not required. For this purpose VAVs contains, a damper, a damper actuator , controller, a digital thermostat (fixed in the room).

What is CAV (constant air volume) ventilation?

Twenty to thirty years ago it was common practice to install a CAV (constant air volume) system in commercial buildings for ventilation and air-conditioning. These types of HVAC systems require high airflow rates and higher amounts of energy for heating and cooling.