Hoffman Data Book for Heating Engineers and Contractors (1925)

Download pdf (15 MB)

Here is the Hoffman Data Book for Heating Engineers and Contractors, Second Edition compiled for the Hoffman Specialty Company in 1925. "The Hoffman devices which transform what would be an ordinary steam heating system into Hoffman controlled heat are six in number: the control valve (No. 7 Hoffman modulating valve), the trap (No. 8 Hoffman return line valve), the vent valve (No. 11 Hoffman vapor vacuum valve), the Hoffman differential loop, the Hoffman damper regulator, and the Hoffman ther-kompo gage. The book also includes tips for figuring heat losses and radiation, the heat transmission of building materials, pipe sizing data, and more.

Thanks to Patrick Linhardt and J.P. Freeley for scanning and sharing this classic book.


Leave a comment

Related Posts

Jarecki Radiators (1890)

Here are ratings for the Erie radiator from Jarecki Mfg Co Ltd. They were based in Erie, PA and their radiators appeared in issues of Domestic Engineering in the 1890s. 


Published on 04/22/2024 4:07 PM
Posted in Heating Museum
A History of the Radiator

Brian Roberts & Paul Yunnie compiled this document that contains beautiful vintage advertisements and illustrations of radiators from the mid to late 1800s and early 1900...

Published on 02/07/2024 2:34 PM by Brian Roberts & Paul Yunnie
Posted in Heating Museum