Thank Denis A brief history of the steam pressure-relief valve. Dan Holohan March 15, 2013 A brief history of the steam pressure-relief valve.Read More
We Put the Fish in Efficiency What exactly is higher efficiency higher than? Dan Holohan February 13, 2013 My friend, Jenni, was visiting from Scotland and had never been to Central Park, so I took her there for a long walk, a ride on the carousel and some wine at the boathouse. We sat outside.Read More
Energy and Power They're not the same thing John Siegenthaler, P.E. February 13, 2013 Most of you reading this column consider yourselves heating professionals.Read More
Understanding barometric dampers Controlling boiler draft saves heat and reduces operating costs Ray Wohlfarth January 15, 2013 One of the most misunderstood components inside a boiler room is the barometric damper, which is used to control the draft inside a boiler.Read More
Heat pumps are renewable energy heat sources John Siegenthaler, P.E. January 15, 2013 I recently read an Internet posting asserting that heat pumps, both air-source and geothermal, should not be considered renewable energy heat sources.Read More
Hydronic heating has come a long way, but system innovation continues Dan Holohan January 15, 2013 Twenty years ago this month, I wrote a column for this fine magazine titled, “Reaching for Higher Plateaus.”Read More
Vertical heating Dan Holohan December 1, 2012 Unraveling the mysteries of early 20th century high-rise steam-heating systems.Read More
Do this, do that John Siegenthaler, P.E. December 1, 2012 A new piping concept and control wiring challenge. Read More
The house by Cedar Hill Dan Holohan November 1, 2012 The early days of district steam heating systems in NYC.Read More