Commercial Geothermal Heat Pump Systems (PART ONE) John Siegenthaler P.E. May 1, 2009 Consider their many attributes, which are well-suited to address concerns about a building’s operational cost and environmental impact. Read More
Expansion Tank Sizing for Solar Collector Circuits John Siegenthaler P.E. April 1, 2009 As with hydronic heating systems, the conservative approach is good “insurance” against the system requiring servicing following a stagnation condition.Read More
Solar Loop Pressurization John Siegenthaler P.E. February 1, 2009 It’s different than with standard hydronic systems. Read More
Flow Intelligence John Siegenthaler P.E. January 1, 2009 New circulators represent a quantum leap in technology. Read More
Hotter Than You Think" John Siegenthaler P.E. December 1, 2008 What happens when a solar collector stagnates? Read More
Panel Radiator vs. Radiant Panel John Siegenthaler P.E. November 1, 2008 The difference is more than a play on words. Read More
Competing Collectors (Part 3) John Siegenthaler P.E. October 1, 2008 There are several qualitative factors to consider in the decision process - any one of which could tip the scales in favor of a specific type. Read More
Competing Collectors (Part 2) John Siegenthaler P.E. August 1, 2008 Comparing numerical performance data has its place, just be sure to remember that the numbers don’t tell the whole story. Read More
Competing Collectors (Part1) John Siegenthaler P.E. June 1, 2008 What's the best type of solar energy collector? Read More
Throttled Down John Siegenthaler P.E. May 1, 2008 Setting the flow restrictor valve for a variable-speed injection mixing assembly. Read More