8o Ventilation with Heating. 



The idea of keeping the strata of warm pure air unbroken by 

 the rush of this hot air through them from the floor to the 

 ceihng, had not completely matured when this arrangement 

 was designed. This may be an advantage, as it will give an 

 opportunity of comparing the effectiveness of the two plans. 

 The ceiling of the rooms being fourteen feet high, there will be 

 the power of a column of hot air of some fourteen feet in height 

 driving air into the upper rooms, and of thirteen feet in height 

 in. the lower rooms. This of itself would deliver a large 

 quantity of pure air, but as well managed Soldiers' Homes are 

 frequently crowded to overflowing, an additional power of 

 ventilation has been provided. This is accomplished with a 

 centrifugal fan driven by a gas engine. Tubes, controlled by 

 valves, lead from the level of the floor of the public rooms to 

 the fan. These tubes will carry away the cold foul air at a 

 moderate rate without the fan being put in motion, so long as 

 the stove is driving air into the rooms by its heat. To give a 

 homely effect to the rooms there is an open Marlborough grate 

 in each. The grates when lighted will assist the ventilation. 

 Even when not lighted there seems always to be a fair draft up 

 the flue, probabl_y caused by wind blowing across the chimney. 



The rooms are lighted with Siemens's Regenerative Lamps, 

 hung under ventilating tubes, without any special alteration of 

 their pattern to suit ventilation. The distance from the funnel 

 of the lamp to the opening of the ventilator is about a foot. 

 The hot current from the lamp for such a short distance cannot 

 cause much disturbance of the horizontal strata of the warmed 

 air. This leaves the rooms with nothing more to deal with in 

 the way of ventilation than the emanations from the assembly. 

 Should the theory of ventilation by descending strata of warmed 

 air not prove correct, there will still be sufficient change of air to 

 prevent the atmosphere of the rooms becoming oppressive 

 during the time of an evening gathering. 



By measurement in the school before mentioned there was a 

 discharge up the foul air flue of 165 cubic feet per minute, and 

 the smoke flue was probably taking away an equal quantity. It 



