But open fires involve
great destruction of fuel and expenditure of money, and in consequence
economic methods have been introduced to the great destruction of
health and life.
Of these methods, the most popular is that by which radiated heat is
banished, and all warmth is gained by introducing heated air. This is
the method employed in our national Capitol, where both warming and
ventilation are attempted by means of _fans_ worked by steam, which
force in the heated air. This is an expensive mode, used only for large
establishments, and its entire failure at our capitol will probably
prevent in future any very extensive use of it.
But the most common mode of warming is by heated air introduced from
a furnace. The chief objection to this is the loss of all radiated
heat, and the consequent necessity of breathing air which is
debilitating both from its heat and also from being usually deprived
of the requisite moisture provided by the Creator in all out-door air.
Another objection is the fact that it is important to health to preserve
an equal circulation of the blood, and the greatest impediment to this
is a mode of heating which keeps the head in warmer air than the feet.
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