Monthly Download

Building #HVAC Airflow Correction Factor CalculationsThis Tech Tip helps you understand when, where, and how to use a field correction factor when measuring airflow. It is for those using the 801 rotating vane anemometer. This one-pager is very handy for technicians who encounter building supply registers that are inaccessible to a balancing hood.

This is a checklist for measuring airflow and calculating the correction factor.

Go to to download this handy sheet.

By registering for free on NCI’s website, access this download and many more.


David Richards, NCIHVAC Equipment Disasters You Can Learn From

Do you ever run into an equipment replacement job you’d rather not think about? Of course you have. In this blog post, David Richardson examines two common disasters and provides some tried and true insights on how to avoid them.

Read it here:

Tips on How to Upsize a Residential Duct System

Rob Falke, President, National Comfort Institute (NCI)When replacing HVAC equipment, better service companies offer duct upsize and system performance upgrades as an option to their customers. These upgrades allow the duct system to perform closer to the level of efficiency claimed by the equipment manufacturer.

Rob Falke explains why you should consider upsizing a duct system and shares some thoughts on how to explain to customers how it benefits them.

Read it here:

Online University

National Comfort Institute, Inc. Online UniversityFeatured this month is the Estimating R-Value and Calculating Heat Loss or Gain training module. This course is designed to help you learn the best methods for estimating insulation R-Value, then calculate either the heat gain or loss through an external wall.

You will discover the three R-Values tests and the associated calculations for each of them. In addition, you’ll learn how to plot R-Value on the R-Value Estimation Chart.

This course is part of National Comfort Institute’s Advanced Technical Training Series that includes 12 multi-part modules.

Learn more about this course in particular and the Online University in general by following this link:


Cloud-Based Tools

Cloud-Based #HVAC Software ComfortMaxxThe world is hurdling down the track towards doing everything in the Internet Cloud. ComfortMaxx™ 4.0 is a cloud-based tool that makes it easy for HVAC technicians to record their performance-based measurements and use them to create consumer friendly reports that can help sell air upgrades and duct renovations.

It speeds up and simplifies the testing process and helps to hold the technician accountable for the work they do.

ComfortMaxx is available in three levels: Air, Pulse, and Verify. Learn more about it and how it can help your business at