The attested static of the system may differ conditional on the choking of filters, positioning of dampers, diffuser positioning etc, which results in the real static pressure of the system, which is relatively less than the maximal design total pressure. The overall static pressure consists of a squared law relation with power consumption of the Air Handling Unit.

Temperature forms an essential part of cooling applications and is relatively achieved in the area as a result of many factors such as ambient temperatures, fresh air availability, temperature of coolant, man movement in the area and the direction of the area.

Heat load refers to the amount of heat energy that would be required to be excised from the system to maintain a comfortable working temperature. The Heat Load is classified into two parts –
a) Sensible
b) Latent
The factors regulating the latent heat of the system are no. of people, ambient temperature, equipment and appliances, including motor heat load as well. The heat load added on the system due to the motor inefficiencies is also considered in the designing of the system vis-a-vis CFM and Cooling capacity. With the use of AAD TECH System there can be a considerable amount of reduction of heat load.

Cooling of air in an AHU is a function of heat transfer to the air passing through the cooling coil. Usually this is considered with a combination of 2 things –
a) Chill water/coolant temperature which is incoming in the coil is used to transfer the coolness to the air passing through the coil.
b) The holding time of the air through the cooling coil i.e. the speed of the air passing through the coil should be optimum in order to maintain efficient heat transfer.
Once the above 2 combinations are prepped, the AHU executes its work to cool down the air at the best efficiency. The role of fan in the cooling of air –
a) Scenario 1
In case of retrofit done if we regulate the FPM (Feet per minute / velocity) of the air through the cooling coil the hold time of air remains the same and hence the coil efficiency and heat transfer is not bothered. In other words system performance is unaffected if the before and after CFM is kept the same.
b) Scenario 2
In case of a new AHU we have to design optimal velocity of air through the cooling coil to keep efficient heat transfer. Again the job of the fan and motor is to blow the amount of air which is set as design parameter.
The added benefit of AAD TECH EC drives in both the scenarios is that because of the very high efficiency of the motors the heat imparted (motor heat load) to the system is nil as compared to the conventional AC motors, hence the extra CFM required for the latent load can also be reduced.