HVAC Resource Library
Templates, checklists, calculators, and links to authoritative standards — tools for understanding and working with HVAC systems.
Templates & Checklists
Air Balance Report Template
What an air balance report contains, a sample table structure with field explanations, and an example completed row.
Air Balancing Readiness Checklist
A practical checklist for project teams preparing for airflow verification or air balancing — equipment, distribution, controls, site, and documentation.
Planned
TAB Checklist — coming soon
Step-by-step checklist for a typical TAB procedure.
Cleanroom Pressure Cascade Checklist — coming soon
Verifying pressure relationships in multi-classification cleanroom suites.
Commissioning Readiness Checklist — coming soon
Pre-Cx checklist for mechanical systems before commissioning begins.
Filter Pressure Drop Log — coming soon
Template for tracking filter differential pressure over time.
Calculators
Air Changes per Hour (ACH) Calculator
Calculate ACH from room dimensions and supply CFM. Compare against ASHRAE reference ranges.
CFM Variance Calculator
Enter design and measured CFM to calculate variance percentage.
Fan Law Calculator
Enter original and new fan RPM to see how CFM, static pressure, and horsepower change using the fan affinity laws.
Air Density Correction Calculator
Estimate the density correction factor and convert ACFM to approximate SCFM from altitude and temperature.
Ak Factor Register Airflow Estimator
Estimate register or grille CFM from face velocity and manufacturer Ak factor. Includes explanation of the method.
Reference
Standards & Guidelines
Ventilation for Acceptable Indoor Air Quality (commercial/institutional)
Ventilation and Acceptable Indoor Air Quality in Residential Buildings
Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings
Ventilation of Health Care Facilities
Method of Testing General Ventilation Air-Cleaning Devices (MERV ratings)
HVAC&R Technical Requirements for the Commissioning Process — TAB procedures
Cleanrooms — Classification of Air Cleanliness by Particle Concentration
Testing, Adjusting and Balancing of Environmental Systems
Testing and Balancing HVAC Systems
HVAC Systems Testing, Adjusting and Balancing
About these links
ABS links only to primary standards organizations. We do not endorse any product, service, or commercial vendor. Some standards documents are available only to members or for purchase. Prices and access are controlled entirely by the issuing organizations.