The Improved Webster Type "R" System of Steam Heating is a service bulletin from Warren Webster and Company (The Pioneers of Vacuum Steam Heating), established in 1888.
Condensing Furnaces: Lessons from a Utility
This is a great article from Home Energy Magazine. The author is Jonathan Beers, Residential Services Manager at Madison Gas and Electric Company. We thank him for giving us permission to post it in our Heating Museum.
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