This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol6", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
(Contributed by H. C. QuEree)
Horses and cows appreciate comfort, are sociable, and require careful treatment. Therefore it is our duty to make their homes pleasant, and to remove all that might be injurious to them, such as hard and sharp corners, door knobs, or in fact any projection which can be avoided. The air which they breathe may be rendered pure by means of good drainage and adequate ventilation.
The air may be admitted by window, " hit and miss " grating, or some such special appliance; but however this may be done, it is necessary to provide some means by which the impure air may find its passage out. A foul-air shaft, taken from the ceiling to a ventilator of some description at ridge level, will afford the necessary means of exit. One or more shafts may be used according to the size of the stable, but they should be taken from as central a position as possible, although, for economy of space in the usual loft above, it is found oftentimes convenient to place the grating in a corner of the stable and to carry the shaft in line with the rafter. At the same time, it would appear wise to secure the best means of ventilation, even though it may mean some slight inconvenience. A fixed iron grating may be placed at the mouth of shaft, or else it may be covered with mesh wire or perforated zinc and have a wood door fixed in grooves, sliding so as to leave ventilator closed or open at will, and controlled by a rope and pull carried over a pulley and fixed at a convenient place. This is shown in Fig. 20, and is a very usual arrangement, but any other of the many systems of ventilation already described in full in Volume III. may be adopted.