David Grassl, PE, Ring & DuChateau LLP, Milwaukee

Articles

Codes and Standards: HVAC February 1, 2014

Don’t blow your money on a steam trap

Steam and condensate leaks cost buildings and industrial plants millions of dollars in lost energy, while increasing emissions from boilers due to increased operation, creating potential safety hazards, and lowering the reliability of operations. This article will review the many factors that impact the reliability, performance, longevity, and maintenance requirements for condensate return piping systems.

By David Grassl, PE, Ring & DuChateau LLP, Milwaukee
HVAC/R and Mechanical December 16, 2013

Optimizing hot water systems with condensing boilers

Selecting a condensing boiler has the potential for high efficiency gains, but understanding special considerations for these boilers could cost you if you design the way you have in the past.

By David Grassl, PE, Ring & DuChateau LLP, Milwaukee
Plumbing, Pumping and Pumps December 16, 2013

Top 10 design tips for condensing boiler systems

There are ten design items that should be considered for designing condensing boiler systems.

By David Grassl, PE, Ring & DuChateau LLP, Milwaukee
Boilers, Chillers September 16, 2013

Selecting chillers, chilled water systems

Selecting the right chiller is generally dictated by capacity, and there are many philosophies on the best way to control, operate, and calculate system operational costs.

By David Grassl, PE, Ring & DuChateau LLP, Milwaukee
HVAC/R and Mechanical September 16, 2013

Calculating chiller selection

An analysis on an office building in Milwaukee shows a dramatic difference in chiller operating costs for a building based on chiller selection.

By David Grassl, PE, Ring & DuChateau LLP, Milwaukee
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