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DanHolohan Member, Moderator, Administrator Posts: 16,568
Trane's vacuum system, from the Turn of the 19th Century. Enjoy!

<a href="http://www.heatinghelp.com/article/163/Older-Steam-Heating-Systems/1828/Trane-Vacuum-System-A-Perfected-Heating-System">http://www.heatinghelp.com/article/163/Older-Steam-Heating-Systems/1828/Trane-Vacuum-System-A-Perfected-Heating-System</a>
Retired and loving it.
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