Health and comfort in house building, or, Ventilation with warm air by self-acting suction power : with review of the mode of calculating the draught in hot-air flues; and with some actual experiments / by J. Drysdale and J.W. Hayward.

  • Drysdale, J. J. (John James)
Date:
1872
Catalogue details

Licence: Public Domain Mark

Credit: Health and comfort in house building, or, Ventilation with warm air by self-acting suction power : with review of the mode of calculating the draught in hot-air flues; and with some actual experiments / by J. Drysdale and J.W. Hayward. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    We need not insist on the above fact, because it is re- cognised by most persons of experience in the art of ventilation, and tliey generally provide two apertures. But here they stop, as though the making of a suf- ficiently capacious inlet and outlet were all that is neces- sary. Messrs. Potts, MacKinnell, Muir, and Watson indeed strongly contend that nothing more is requisite. And this is really all that is generally done in the way of ventilation; in fact it forms the basis of nearly all the plans of ventilation at present in use. But this is not enough ; and it does not, will not, and cannot answer for house-ventilation in this country; because there is at least one circumstance that forms a fatal objection to all these schemes, and that is that nearly always the outer air is cold air ; and cold air cannot with safety be admitted into our rooms at all times; nor indeed will it be, for in cold weather the inmates will stop up the holes in order to keep it out. Of this we have had ample evidence, and observation in this direction will quickly convince any one of the fact, as it did the Goveenment CoMMissiONEES ; the results of whose investigation are given in the following words:— The science or art of ventilation of buildings has never been reduced to system. Openings are made from the open air outside a building, below for the admission of fresh air, and above for the escape of the foul, in various fanciful ways; but the cold draughts are so inconvenient that every endeavour is practised to obstruct the inlet. {Goveimment Blue Booh on Warming and Yentilation of DivellmcjSj p. 126.) The writer of the most recent summary of this question says:-—The art of warming or ventilating a building is not a difficult one; but the art of warming and ventilating is extremely difficult, and cannot be said to have attained to anything like perfection. {Cydopcedia of Usefid Arts, published