. The principles of ventilation and heating and their practical application. Figure 71.—DETAIL OF MIXING VALVE. these halves is connected to the supplementary-coil chamber, and has astopper at the bottom, while the other half is open. The register,instead of having valves in the ordinary way, has a solid semi-circulardisk, which can be revolved under the fretwork by a key introducedinto the slot in the middle, as shown. This semi-circular disk may beturned so as to close one or other of the semi-circular pipes, or it may VENTILATION AND HEATING. 213 be made to cover one-half of each, so that o
. The principles of ventilation and heating and their practical application. Figure 71.—DETAIL OF MIXING VALVE. these halves is connected to the supplementary-coil chamber, and has astopper at the bottom, while the other half is open. The register,instead of having valves in the ordinary way, has a solid semi-circulardisk, which can be revolved under the fretwork by a key introducedinto the slot in the middle, as shown. This semi-circular disk may beturned so as to close one or other of the semi-circular pipes, or it may VENTILATION AND HEATING. 213 be made to cover one-half of each, so that one-quarter of the fretworkis delivering air at 60 degrees, while another quarter is at120 degrees, or any other proportions of the two currents may beobtained by shifting the position of the semi-circular disk without reduc-ing the Figure AND SECTION OF MIXING REGISTER. A modification of this register for side-wall flues has also beendesigned by the same person. I consider it to be very desirable that some form of valve calculatedto effect the purpose for which the above are suggested should be usedmuch more extensively than is at present the case, and it is in this 214 VENTILATION AND HEATING. direction that the most immediate and important improvement of ven-tilation of dweUing-houses in this cHmate can be effected. Nor should the application of this method be confined to steam andhot-water heating, seeing that it is quite as important, to say the least, infurnace-heated houses. At present, in the most costly dwellings heatedby indirect radiation, the only way to promptly diminish the heat whenit becomes oppressive is to close the register, and shut out the fresh airas well. It may be well, however, to warn the architect or heating engi-neer that to obtain good results from this device it is necessary
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Keywords: ., bookcentury1800, bookdecade1880, booksubj, booksubjectventilation
