Show HEALTH A affa mir 1 H proper ventilation is 1 being obtained as long as I 1 air remains in motion 7 by virginia vale V WEARS EARS ago in lecturing on I 1 I 1 ventilation to school teachers I 1 gave the old rule every pupil should have an air space of 1000 cubic feet 10 feet high 10 feet wide and 10 feet long and the air should be changed three times in each hour is today and for many years past air space is not discussed because as long as air is in motion carrying used air away and allowing fresh air to enter a room proper ventilation is being obtained that the air may not be moving too fast thus causing drafts is now being carefully watched however in addition to moving air air must be of a certain t a in temperature and moisture for both health and c comfort so trains cars and even or dr barton busses b e si d e s homes homei offices and other buildings are now equipped with what is well known as air conditioning in order that the general public should know more about air condl conditioning tio ning what is the proper rate of movement of air and also the proper temperature and moisture the amer american ican society of heating and ventilating engineers has made a cod of f minimum requirements tor for comfort air conditioning set ideal conditions for winter air conditioning 70 degrees fahrenheit indoor temperature pera ture with 35 per cent relative humidity moisture when outdoor temperature is 30 degrees is set as a minimum design standard for summer air conditioning an indoor design schedule of effective temperatures which are an index of comfort based on a combination of temperature relative humidity and air motion is established ranging from 71 degrees effective temperature pera ture when it is 80 degrees outside to degrees effective temperature pera ture when it is degrees outdoors the code specifies the introduction of outside air tor for ventilating purposes at a rate of not less than 0 cubic feet per hour per occupant or not less than 15 cubic feet in premises where smoking Is permitted with removal of 95 per cent of ordinary dust particles to provide the necessary air purity the rate at which air is allowed to now flow into the room should should be total more than 50 linear feet per minute 0 bell syndicate service |