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Stetz Consulting LLC brings over 20 years of energy-efficiency experience to your project or facility. We can help save you money by reducing operating costs, improve comfort and climate control, and minimize your carbon footprint. Let us help identify inefficiencies that contribute to high operating costs, recommend technologies and strategies to improve performance, and evaluate the economics of potential facility upgrades. During 2011 and 2012, Stetz Consulting conducted forty-five energy audits covering over 7.8 million SF of data center, commercial, warehouse, and industrial facilities. These audits identified 30 million kWh, 10,000 MMBTU, 18,000 metric tons of carbon dioxide emissions, and 2.4 million dollars in potential energy savings. Specialties include:

  • Measurement & verification of energy savings resulting from performance contract, either owner or energy-service company perspective.
  • Conducting energy audits to identify energy- and cost-saving strategies.
  • Participating in the building design process to incorporate daylighting, passive solar heating, reduced solar gain and cooling loads, and reducing overall energy use.
  • Evaluating renewable energy and emerging technologies for specific applications.
  • Supporting LEED BD&C and EB/OM projects.
  • Develop and conduct training workshops in M&V, energy efficiency, economics, and statistics.


New Webinar

December 11, 2013 Economizer Diagnostics Utilizing Data Loggers

Commercial building air handlers and rooftop units use economizers to save energy. Economizer failure leads to energy waste by increasing heating and cooling consumption and absent any obvious comfort problems, failures are typically not identified. These “invisible” failures are the leading cause of energy waste in HVAC systems, but are easily repaired.

This 1-hour online course hosted by Onset and developed by Mark Stetz, discusses how economizers should work – and why they don’t – not all failures are apparent. A case study demonstrates rooftop unit evaluation using portable data loggers and Microsoft Excel. These methods can be applied to BAS data as well. At the end of this course, attendees will be able to:

  • Understand how economizers reduce energy use
  • Understand failure modes
  • Develop and implement an economizer diagnostic plan
  • Evaluate information obtained from data loggers or a BAS
  • Interpret results and develop a corrective course of action

This course is intended for facility managers and operators, HVAC technicians, mechanical engineers, and commissioning agents. Participants should be familiar with air handler and rooftop unit operations and maintenance, temperature and humidity sensors, basic computer skills, and be able to use Microsoft Excel.

This course is approved for one GBCI credit hour. A Certificate of Completion will be provided for self-reporting to GBCI and other organizations. ___________________________________________________________________________________

E-learning Course: Using Excel® to Evaluate Building and System Data-

Stetz Consulting – in partnership with Onset Computer – is introducing an online self-paced course using Microsoft Excel to evaluate data logger and BAS data. Six recorded modules are available on demand. They demonstrate manipulation of time-series data in order to extract meaningful information from data loggers, building automation systems, and utility interval data. . The course will show you how to:

  • Calculate energy consumption by time-of-use
  • Calculate maximum, minimum, and average temperatures for occupied & unoccupied periods
  • Merge time-series data from different sources
  • Create informative graphs

These manipulations and calculations are necessary to convert time-series data into actionable information for energy auditing, commissioning, measurement & verification, and diagnostic purposes.

This course is intended for commissioning agents, energy consultants, simulation modelers, facility operators, and anyone who uses data loggers, extracts data from a building automation system, or needs to evaluate building load profiles. A general knowledge of the Microsoft Excel spreadsheet program, data loggers, building automation systems, and utility interval data is expected. Module 6 assumes a basic knowledge of statistics and linear regression models. This course is an excerpt from the 4 hour webinar ‘Using Data Loggers for Performance Monitoring’, but the methods shown can be used to evaluate any time-series data. It is approximately 1.5 hours in length and has been approved for one GBCI CEU. Cost is $95.


Using Data Loggers for Performance Monitoring – Online Professional Training. Learn how to select and use data loggers for building diagnostics, commissioning, and performance verification.

Developed and presented by energy consultant and educator Mark Stetz, P.E. of Stetz Consulting and hosted by Onset Computer, this 4 hour online course is taught in two, 2-hour sessions. You will learn:

  • How to evaluate and deploy data loggers for building diagnostics, commissioning and measurement & verification projects
  • How to interpret collected data to understand building system behavior and identify problems.

First Quarter 2014

USGBC Education Provider
Energy Star Partner