Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 208
if it be first introduced at the floor, so that there is noadvantage, in the way of heating the floor, by having the hot-air registersin or near it. This may be easily verified by burning some damp straw inthe fresh-air box or flues of a furnace and observing the course taken bythe warm air, thus… … Fig. 146. Movement of Hot Air from Furnace Flues. ceeds more or less that of the surrounding air. Outside of this columnthe air will be no warmer at or near the floor than if no register thereexisted, until the heated air at the top descends in regular strata to thebottom. In fact, one of the best…
Fireplaces
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