TABLE OF CONTENTS Once the criteria and multipliers are developed as described above, the load calculations are simply a matter of accurately determining areas, internal load densities such as people and watts per square foot, special process loads, and any unusual conditions. Where more than one room or zone has the same size, exposure, and internal loads, a typical calculation can be done. Corner zones should always be calculated separately. East-facing zone loads will normally peak from 10 to 12 a.m., while most building loads will peak from 3 to 5 p.m. South-facing zones are similar but will peak usually from noon to 2 p.m. and may peak in winter. All zones should be calculated at both zone peak (for sizing air-handling equipment) and building peak (for sizing central equipment). Buildings such as churches and restaurants will usually have peaks at times within an hour or two after maximum occupancy occurs. Judgment and experience must be applied.
Calculations should be done on standard forms. There are many such forms. Designers should use whatever form is found most satisfactory, or is required. Figure 3.9 (p. 71) is a form which has been used satisfactorily. Zone and room calculations must then be summarized, by grouping rooms and zones in the way in which air-handling systems will be applied. A typical summary form is shown in Fig. 3.10 (p. 72).
The summary includes a column for listing the design airflow in cubic...
