wo items are significant in deciding the choice of the final equipment :
i) The amount of latent (moisture) load in relation to the total load.
ii) The relative humidity specified to be maintained
a) Generally, if the relative humidity is to be maintained between 50-60%, it is more economical and preferred to employ standard air conditioning. However, if the latent load, even at this RH levels, is predominant or significant, e.g. Supermarkets, large fresh air equipments, it is recommended and preferred to divide the sensible load on the refrigeration equipment and latent load on desiccant dehumidification equipment.
b) For relative humidity to be maintained below 45 to 50%, desiccant dehumidifiers offer the most economical, efficient and simplest method of humidity control.
c) Often humidity levels are not correctly specified as the user is not aware as to what RH levels and moisture will have ill-effect on its products and processes.