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Flat geometric split illustration comparing HVAC testing and balancing field measurement with building commissioning controls verification, side by side.
Testing and Balancing, Commissioning, Building Performance, New Construction

TAB vs. Commissioning: What's the Difference, and Do You Need Both?

Testing, adjusting, and balancing (TAB) verifies that airflow and water flow through a building's HVAC equipment match...
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Flat geometric illustration comparing occupied and unoccupied HVAC airflow states in a hospital operating room ceiling, showing a laminar flow diffuser, occupancy sensor, and automated turndown control.
Testing and Balancing, Healthy Buildings, Commissioning, Utility Rebates, Building Performance, Compliance

ASHRAE 90.1's New OR Turndown Mandate: What Hospitals Need to Know

ASHRAE/IES Standard 90.1's Addendum bh, approved April 30, 2025, requires operating rooms, surgical cystoscopy rooms,...
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need to create an image: A flat, geometric technical illustration of a VAV (variable air volume) terminal box, shown as a clean cutaway diagram of the rectangular sheet-metal casing only: a round or oval inlet duct connection at one end, an internal damper blade on a shaft with an actuator mounted on the casing exterior, and a velocity/airflow sensor pickup just downstream of the damper. Discharge side shows a short duct stub only — no grille, no diffuser, no ceiling tile in contact with the box. The box floats in an open ceiling plenum space, with a technician's hand holding a separate handheld digital airflow meter near the discharge duct stub (not touching or mounted to the box). Background: a faint architectural wireframe of a glass skyscraper interior, straight edges, drafting-line style, in Aero Dark Blue ( #043659) with light wireframe strokes. Overlay 3–4 flat hexagon shapes in Aero Light Blue ( #00A9E0), Hill Blue ( #005EB8), and Aero Orange ( #ED7D31), some solid-filled, some outlined, clustered in a corner. Aero Orange highlights the sensor or a small out-of-range indicator on a simple line graph in the corner. Flat, solid color fills only — no gradients, no glow, no drop shadows, no photorealism. Do not depict a diffuser, grille, or register attached to or built into the VAV box itself. Clean vector/illustration style, high contrast, no text, no logos.
MBCx, Testing and Balancing, Commissioning, Building Performance

Why Do VAV Boxes Fail Without Tripping a BAS Alarm?

A VAV box can run out of design tolerance for months without ever generating a building automation alarm, because most...
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HVAC duct leakage testing by Aero Performance Group technician using airflow measurement equipment to validate duct system performance, energy efficiency, and SMACNA compliance in a commercial building.
Testing and Balancing, Commissioning, Building Performance, New Construction

How Is Commercial Duct Leakage Tested, and What Do the Codes Require?

Commercial duct leakage testing pressurizes a representative section of installed ductwork with a calibrated fan and...
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looking at buildings from a park
MBCx, IAQ, Healthy Buildings, Commissioning, Utility Rebates, Building Performance

LEED v5 Commissioning Guide: Commissioning, Monitoring-Based Commissioning (MBCx), and Retro-Commissioning Explained

LEED v5 places significantly greater weight on verified, ongoing building performance, making commissioning,...
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photo of businessman looking at cogwheels
MBCx, IAQ, Healthy Buildings, Commissioning, Utility Rebates, Building Performance

What Your BAS Isn't Telling You (And What It's Costing You)

A Building Automation System monitors equipment, but it doesn't diagnose inefficiency. A BAS can show "normal"...
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Testing and Balancing, IAQ, Healthy Buildings, Building Performance

Testing and Balancing (TAB): What It Is, Why It Matters, and How It Impacts Building Performance

What is testing and balancing in HVAC? Testing, Adjusting, and Balancing (TAB) is a systematic process used to measure,...
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MBCx, IAQ, Healthy Buildings, Commissioning, Utility Rebates, Building Performance

Monitoring-Based Commissioning: What It Is, How It Works, and Why Buildings Need It

Last updated: June 26, 2026 What is monitoring-based commissioning? Monitoring-Based Commissioning, often called MBCx,...
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MBCx, Testing and Balancing, IAQ, Healthy Buildings, Commissioning, Utility Rebates, Building Performance

Why BOMA BEST Matters — and Where Buildings Commonly Struggle

Why BOMA BEST Matters — and Where Buildings Commonly Struggle Key takeaways:
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MBCx, Critical Environment, Healthy Buildings, Commissioning, Utility Rebates, Building Performance

Healthcare Building Analytics in 2026: A Complete Guide

Running a healthcare facility means balancing patient safety, regulatory compliance, and operational costs every single...
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