Higher aspect ratio (the long side is much longer than the short side) ducts will have a longer distance to travel along the long side, which will help to distribute the air more evenly across the cross-sectional area.

Steel sheets are exclusively used for medium and high pressure ducts because they are stronger and more rigid than other materials, such as aluminum or plastic.

When there is an abrupt expansion in the duct, the pressure loss in the duct will be significant. As the duct expands abruptly, kinetic energy of the air flowing will be converted to pressure drop

Chiller dehydrators are typically installed in the condenser or evaporator of an HVAC system. They work by passing the refrigerant through a drying medium, such as silica gel or activated alumina. The drying medium absorbs the water and non-condensable gases from the refrigerant, leaving the refrigerant dry and free of contaminants. Presence of water and non-condensable gases in refrigerant results in reduced efficiency, corrosion and foul odor in HVAC system

The larger condenser area allows for more heat to be transferred from the refrigerant to the airstream. Therefore refrigerant leaving condenser will have lower temperature

The wet-bulb depression is the difference between the dry-bulb temperature and the wet-bulb temperature. When there is less moisture in the air, the wet-bulb temperature will be lower, and the wet-bulb depression will be greater.

An activated carbon adsorber is a device commonly used to remove gaseous contaminants from the air. Activated carbon is a highly porous material with a large surface area, which makes it effective for adsorption.

It is a measure of the total energy contained in a unit mass of air. The enthalpy of air is a function of the temperature, pressure, and humidity of the air.

When the air temperature drops below the dew point temperature, the excess water vapor condenses into liquid water.

The charged ions attract the dust particles, which then stick to the stainless steel plate. The plate can then be easily cleaned to remove the dust.

Ducturns help to smooth out the airflow, which reduces the turbulence and the associated pressure loss. Ducturns are specially designed to reduce the turbulence that occurs when air flows through a square elbow. This turbulence can cause a significant amount of pressure loss, which can reduce the efficiency of the HVAC system.