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After moving the gravity-hot-water-system expansion tank from the attic to the basement, The Stack Heater Company introduced a heating system that didn't need a tank at a...

Here instructions for the Thrush Flow Control Valve from the H.A. Thrush & Company. Thanks to Mike Zydiak for finding and sharing this document with us.

H. A. Thrush & Company of Peru, Indiana published this book for contractors about the Thrush System of Hot Water Heating.

Before circulators arrived, heating contractors tried some very interesting things to get the water to flow where they wanted it to flow. Here's a good example of that fr...

This article about calculating floor types for radiant heating systems first appeared in Plumbing & Heating Business magazine in September 1941.

The things we talk about today, they talked about more than 50 years ago. Check out this article from the Western Plumbing and Heating Journal in 1950 regarding the actua...

This document is from the 1949 edition of Audel's Plumbers and Steam Fitters Guide #3 and includes an informative section on radiant heating. Thanks to Larry Weingarten f...

Bundyweld was lightweight tubing that came out of the automobile industry and was a radiant-heating alternative to wrought iron and steel pipe in the days following World...

A.M. Byers Company sold wrought iron pipe, not systems, but they put this booklet together to promote radiant heating. It's really well done, with lots of installation ph...

Here are the complete installation instructions for the radiantly heated homes in the Weathersfield development of Schaumburg, Illinois, built by the Campanelli Brothers....