Understanding Calibration

Accurate measurement of temperature, pressure, level, humidity and flow are essential to equipment and systems operation. Inaccurate instrument readings can have a cascade affect on HVAC systems, particularly large ones, and energy efficiency can suffer greatly when instruments are not properly calibrated. It is important to understand calibration, how to properly calibrate instruments, and how often it is required. Calibration is a process in which measuring instruments are configured to align with the established standard. Many instruments require calibration every 12 months, but some must be calibrated on a monthly or quarterly basis, depending on protocols and the device’s criticality. A

Make-Up Air System Project for Vocational School Culinary Arts Lab

PJM Mechanical Contractors, Inc. recently completed the installation of a large make-up air system as part of the renovation of a Central New Jersey technical school’s culinary arts lab. The project was on a rigid schedule to accommodate facility needs while the school year was in session. A makeup air system serves a key role in commercial kitchens and cafeterias, replacing air drawn out by powerful kitchen exhaust equipment and providing heating and cooling. PJM utilized 3D building information modeling to ensure that the new air handling unit and all hoods, ductwork, ceilings, lighting, piping, and exterior roof supports would fit with precision. Architectural features of the 1,800 square

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