Book - School of Science and Technology

16 Fundamentalsmeasure them, application of this knowledge to system design cannot proceed without themore detailed examination of the various aspects, as outlined in the chapters whichfollow. This brief reÂsume of the fundamentals may thus be best summarised by referenceto Tables 1.8 and 1.9 which provide, respectively, proposed values of dry resultanttemperature (t res ) for most common applications and outdoor air supply rates for sedentaryoccupation.The temperatures proposed are for the basis of design and relate to normal clothing forthe listed enclosures. Summer temperatures apply to air conditioned or comfort cooledapplications; higher temperatures may be acceptable where such conditioning is notprovided. For naturally ventilated spaces, typically, a dry resultant temperature of25 C may be acceptable if this is not exceeded for more than about 5% of the occupiedperiod. In a year-round controlled environment, there is no merit for normal comfortapplications in controlling temperatures within close tolerances. Both in terms of comfortTable 1.8 Proposed comfort criteriaDry resultant temperature t res ( C)Type of enclosure Winter SummerBars, lounges 20±22 22±24Call centres 21±23 22±24Churches 19±21 22±24Conference, board rooms 22±23 23±25Dwellings:bathrooms 26±27 26±27bedrooms 17±19 23±25kitchens 17±19 21±23living rooms 22±23 23±25Exhibition spaces 19±21 21±23Factories:heavy a 11±14 spot coolinglight a 16±19 spot coolingsedentary 19±21 21±23General areas, corridors, etc. 19±21 21±23Hotel:bathrooms 26±27 25±27bedrooms 19±21 21±23Kitchens:commercial 15±18 18±21Museums:galleries b 19±21 21±23Offices:executive 21±23 22±24general 21±23 22±24open plan 21±23 22±24Swimming pool:changing 23±24 24±25halls c 23±26 23±26Sports centres:changing 22±24 24±25halls c 13±16 14±16Restaurants 22±24 24±25Shopping centres:malls 19±24 21±25Shops:stores 19±21 21±23Teaching spaces 19±21 21±23NotesFor accommodation in hospitals refer to the DHSS Building Notes.a Subject to legislation.b Conditions for exhibits may override comfort criteria.c Audience spaces may require different comfort conditions.