Thanks for Visiting the NADCA Booth!
It was a pleasure connecting with you.
NADCA is the global trade association representing the HVAC inspection, cleaning, and restoration industry. We develop standards, technical resources, and research to support professionals responsible for building performance, indoor air quality, and system efficiency.
Below you’ll find complimentary resources shared at the booth, including:
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Our peer-reviewed HVAC Energy Study
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ACR, The NADCA Standard - 2025 edition
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The NADCA General Specification
If you’re looking for something specific or would like to discuss how these resources apply to your projects, I’m happy to connect.
And if you put these materials to use, I’d genuinely love to hear how they support your work.
— Jeanne
NADCA Energy Study Download
NADCA partnered with Dr. Mark Hernandez of the University of Colorado to conduct a peer-reviewed study examining the impact of HVAC system cleaning on energy efficiency and ventilation performance.
Key Findings
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41%–60% reduction in fan and blower energy consumption
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10%–46% improvement in supply airflow compared to uncleaned systems
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Measurable gains in ventilation performance and system balance
The research confirms that accumulated debris in HVAC systems restricts airflow, increases energy demand, and disrupts ventilation effectiveness. Routine cleaning restores designed airflow, improves conditioned air delivery, and supports energy-efficient system operation.
Maintaining clean HVAC systems helps balance three critical factors in building performance:
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Indoor air quality
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Ventilation effectiveness
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Energy consumption
Download the full study to review methodology, field data, and performance implications.
NADCA General Specification for the Cleaning of Commercial Heating, Ventilating and Air Conditioning Systems
The NADCA General Specification provides a framework for developing project-specific HVAC system cleaning requirements for commercial buildings.
Designed for use by industrial hygienists, engineers, architects, specifiers, and facility managers, the document supports the creation of clear, enforceable cleaning specifications aligned with industry standards.
The specification is written in 3-Part CSI format, allowing for straightforward integration into construction documents and customization based on project scope.
Download the NADCA General Specification
ACR, The NADCA Standard For the Assessment, Cleaning, and Restoration of HVAC Systems
ACR, The NADCA Standard establishes the minimum requirements for evaluating and restoring HVAC systems to a defined level of cleanliness.
It provides industry-backed guidance for:
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Assessing both new and existing HVAC systems
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Evaluating and verifying system cleanliness
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Preventing job-related hazards during cleaning activities
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Cleaning and restoring HVAC systems to a specified cleanliness standard
ACR serves as the foundation for defensible, performance-based HVAC system hygiene practices across commercial and institutional buildings.
Download ACR, The NADCA Standard (ENGLISH)
Download ACR, The NADCA Standard (ESPANOL)