Book - School of Science and Technology

202 Heat emitting equipmentcovered with a variety of books and papers: a top angled at 45 is an encouraging first stepin the movement of letters towards files (and files towards cabinets).There are many further aspects in application of convective heating equipment whichare unique to a given manufacturer and reference must in those circumstances be made tothe technical data published. One single point, however, which seems to receive inadequateattention is that the heating elements of most natural and forced convectors areparticularly susceptible to reduced output as a result of accumulation of air in the waterways.As will be appreciated, there is little free space above the tubes in the elementheaders to accept air, in contrast with that available in a radiator. With those waterswhich tend to encourage the initial formation of gas and air mixtures, some engineers fitair bottles above the element header as a palliative.Any form of convector, natural or forced, requires some level of maintenance to keepthe finned heating element free from dust, etc., even if this is no more than good housekeeping:it is for this reason that particular attention to convenience of access is not onlydesirable but absolutely essential.