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Hvac guide 1 onset Monitoring HVAC Performance with Data Loggers HOBO Data Loggers onsetcomp com Cwww onsetcomp com Conset Monitoring HVAC Performance with Data Loggers INTRODUCTION Comfort and Indoor Environmental Quality Assessment People First Comfort

onset Monitoring HVAC Performance with Data Loggers HOBO Data Loggers onsetcomp com Cwww onsetcomp com Conset Monitoring HVAC Performance with Data Loggers INTRODUCTION Comfort and Indoor Environmental Quality Assessment People First Comfort Indoor Air Quality HVAC SYSTEM DIAGNOSTICS FINDING PROBLEMS AND SAVING ENERGY THROUGH RETROCOMMISSIONING Equipment Runtime Compressor Short-Cycling Stuck Dampers And Poorly Functioning Economizers Supply Air Temperature Not Optimized TYPES OF DATA LOGGERS Standalone Data Loggers Web-based Data Logger Systems Wireless Sensor Networks CHOOSING DATA LOGGERS Measurement Accuracy Software and Ease of Con ?guration Battery life Memory Cost of Ownership Product Support RESOURCES - -LOGGERS Monitoring HVAC Performance with Data Loggers Conset Introduction Building operators and managers have the di ?cult job of providing comfortable working conditions and coaxing aging mechanical equipment to operate at peak performance while minimizing energy costs If the mechanical equipment is old or has inadequate controls maintaining comfort at a reasonable cost may prove di ?cult or impossible Although energy costs typically represent only of a building ? s operating expense when occupant salaries are included they are easily managed expenses Energy cost savings ow directly to the bottom line as increased pro ?ts In many areas utility companies and state governments provide incentives for energy e ?ciency upgrades that reduce operating costs and often improve comfort Federal tax incentives are also available for commercial building improvements Identifying opportunities and verifying savings from self- implemented e ?ciency upgrades remains a challenge for those with limited resources and experience Increasingly building owners are seeking Leadership In Energy And Environmental Design LEED designation for their buildings certi ?cation requires meeting speci ?c energy use and indoor environmental quality targets that improve comfort and reduce operating costs while adding value to the building All of these goals have a common theme one must understand how a building and its systems are operating Data loggers provide unbiased evidence of system operations - good and bad They can help locate the source of comfort problems diagnose HVAC equipment operation identify potential energy e ?ciency upgrades verify savings and contribute to achieving LEED certi ?cation This guide provides an introduction to assessing and diagnosing common comfort environmental quality and mechanical problems Monitoring HVAC Performance with Data Loggers www onsetcomp com Conset Comfort and Indoor Environmental Quality Assessment People First People spend most of their lives indoors and expect buildings to provide comfortable conditions under all circumstances The purpose of an HVAC system is to maintain the space temperature within a set range control humidity and provide fresh air Comfort Results of scienti ?c studies quantifying comfort will come as no surprise to anyone charged with operating a building you cannot please everyone Even in conditions where most people are comfortable up to of the population may still be too hot or cold People vary in their desired comfort range depending on age gender activity level and clothing The American Society of Heating Refrigeration and Air Conditioning Engineers ASHRAE conducted research that led to Standard Thermal Environmental Conditions for Human Occupancy