Comment on Discussion on four aspects of Misunderstanding analysis of “dry coil”

Points out that the intention of using “dry coils” is to let no water condensed from the fan coil unit (FCU); that the experiment performed by the author is aimed at determination of the critical inlet water temperature of the “dry coil”; that careless use of the wet-dry condition theory of the coil in the “dry coil” have lead to a series of misunderstanding; that further study is needed of the cooling capability calculation of“dry coils”; that outdoor air reheating in comfortable DOAS is unreasonable and unnecessary; and that the control method of avoiding condensation in “dry coil” is already a well-commercialised technique. The “dry coil” technique should not be used for merely keeping the condensed drain pan dry and the indoor air quality better because of its poor cost-effectiveness while there are many other cheaper and effective approaches available.