The ventilation hand book
Subtitle: the principles and practice of ventilation as applied to furnace heating; ducts, flues and dampers for gravity heating; fans and fan work for ventilation and hot blast heating
By: by Charles L. Hubbard. A series of questions, answers and descriptions, illustrated by one hundred and thirty-seven engravings.
Publisher: The Sheet metal publication company
Published: 1916
Place of publication: New York
Subjects: Ventilation.