OCR Text |
Show Pure Air Devices In Demand. Hard apace after the water Alter and distiller In tho race for hyglono comes the ventllntor. A Boston builder build-er says that ventilation is, In effect, tho process of dilution, and that when the vitiation to bo maintained in apartmonts is decided the necessary constant supply of fresh air to maintain main-tain this standard may bo calculated. Tho average production of carbonic acid by un adult at rest is O.C cubic foot per hour, tho proportion of this gas In the external air being four parts In 10,000. The 0.6 cubic foot of carbonic acid produced per hour by a single Individual will require for Its diluting 3,000 cubic foet of air por hour. But tho absolute air volumo to bo supplied cannot be specified without with-out a thorough knowledgo of nil tho conditions and modifying circumstances circum-stances tho climate, construction of tho building, size of tho rooms, number num-ber of occupants, their healthfulncss and activity, together with tho tlmo occupied, all must bo considered. |