File:N&AMOV - Schoolroom - Impulsion.png

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DescriptionN&AMOV - Schoolroom - Impulsion.png	English: MECHANICAL VENTILATION ON THE DOWNDRAUGHT SYSTEM, BY IMPULSION, OR THE 'PLENUM' PRINCIPLE, APPLIED TO SCHOOLROOMS. A Roof Ventilator. B Main Upcast Shaft. C Horizontal Foul Air Trunk. DD Connecting Pipes from Foul Air Flues. EE Foul Air Flues. FF Foul Air Exits into Flues EE. GG Fresh Air Supply Flues through which the air is mechanically projected at a high velocity up on to the ceiling and then descends, escaping at Exits FF into Flues EE. N.B. The fresh air supply heated to such a temperature, as is necessary to effectually warm a building, is thereby seriously deteriorated for breathing purposes, therefore to secure healthy ventilation the heating of a building should always be separate and distinct from that of the air supply. BLUE Fresh air supply. 蓝色：新风供给。 YELLOW Products of combustion. BROWN Products of respiration. RED Products of respiration from infected scholars.
Date	1899
Source	Natural & Artificial Methods of Ventilation
Author	Robert Boyle & Sons

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	15:14, 14 March 2011		468 × 440 (87 KB)	Ktulu789 (talk \| contribs)	Reduced yellowish look. Now references look fine. Older red and brown seemed equal.
	01:42, 3 June 2008		468 × 440 (358 KB)	T. Mazzei (talk \| contribs)	{{Information \|Description={{en\|1=MECHANICAL VENTILATION ON THE DOWNDRAUGHT SYSTEM, BY IMPULSION, OR THE 'PLENUM' PRINCIPLE, APPLIED TO SCHOOLROOMS.}} \|Source=Natural & Artificial Methods of Ventilation \|Author=Robert Boyle & Sons \|Date=1899 \|Permission=

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