Mechanical Devices in the Home
CHAPTER VII. WARM-AIR FURNACES 57
56. Principle upon which a furnace works. 57. The stove part. 58. The cold-air shaft. 59. Hot-air pipes. 60. Location of the furnace. 61. Air. 62. Pipeless furnaces.
Mechanical Devices in the Home
56. Principle upon which a furnace works. 57. The stove part. 58. The cold-air shaft. 59. Hot-air pipes. 60. Location of the furnace. 61. Air. 62. Pipeless furnaces.