Practical sanitation; a handbook for sanitary inspectors and others;with apxon Sanitary law, by Herbert Manley . brackets when fixed on awall in the neighbourhood of afire-place may be ventilated by anoverhanging pipe communicatingwith the flue; this arrangementneed not necessarily be connecting such ventilatingpipes, it is important to notice that the flue in question is notcommon to two rooms. It is by no means an unusual custom,although it is a highly objectionable one, to connect a fire-placeon the first floor with the flue coming from one on the groundfloor, and, under such c
Practical sanitation; a handbook for sanitary inspectors and others;with apxon Sanitary law, by Herbert Manley . brackets when fixed on awall in the neighbourhood of afire-place may be ventilated by anoverhanging pipe communicatingwith the flue; this arrangementneed not necessarily be connecting such ventilatingpipes, it is important to notice that the flue in question is notcommon to two rooms. It is by no means an unusual custom,although it is a highly objectionable one, to connect a fire-placeon the first floor with the flue coming from one on the groundfloor, and, under such circumstances, if the gas ventilatorbelonging to the down-stairs room is carried into the flue, theoffensive fumes are likely to be discharged into the room too little attention is paid to the method of lighting roomsby gas.* What in itself is injurious when burned in the roomas a naked flame, owing to the impurity which is added to thea tmosphere as the result of combustion, may, by an arrangement * For a description of various gas burners, see Our Homes, Chaps, xliv.—R. BrudeneU Fig. 18. VENTILATION AND WARMING. 69 such as has been described, not only be rendered harmless, butactually turned to account as an excellent aid to ventilation. Inall new houses especially this fact ought not to be lost sight of. A small jet of gas burning in an outlet ventilating shaft—apart from any consideration of lighting—will greatly facilitatethe upward current of air. Steam may, when available, be used as a means of ventila-tion by extraction, by being discharged in the form of a jet intothe outlet shaft. By this means a volume of air is set in motionwhich is said to exceed by 200 times the volume of the steam. The following is a summary of some of the chief points thathave to be borne in mind in connection with ventilation:— 1. That in order to keep the air of a room within the recog-nised standard of purity, it is necessary that 3,000 cubic feet offresh air
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