Rob Falke

National Comfort Institute

Rob “Doc” Falke serves the industry as president of National Comfort Institute an HVAC-based training company and membership organization. If you're an HVAC contractor or technician  interested in a building pressure measurement procedure, contact Doc at  or call him at 800-633-7058. Go to NCI’s website at for free information, articles and downloads.


How to Upsize a Residential Duct System

Energy Savings at the Meter...Try Selling That to Your HVAC Customer!

Finally, the powers-that-be have come up with a new way to measure energy savings. They’ve figured out that the “wish-a-watt” method of declaring energy savings using assumptions needs an upgrade.

Summer’s Coming; Remember That Cold and Clammy Feeling?

As your cooling system kicks on, you’ll soon experience a type of air conditioning that is remarkably uncomfortable. The air feels heavy and cold, but it’s also clammy. The thermostat says it should be comfortable, but you aren’t. What is that feeling, and what’s really going on with the system?

Let’s look at what causes this condition and how some simple repairs with a little instruction to your customers can help them avoid that Cold and Clammy Feeling.

What’s the Cause?

People Care About Your Career’s Impact on Your Life

In the December 21, 2016 edition of Hotmail, I wrote about the importance and usefulness of writing a history of your company. Today I’d like to go one step further and discuss the benefits of writing down your personal career history.

Troubleshooting Rooftop Unit Curbs 1

A constant stream of evidence confirms performance losses up to 30% from roof curbs due to poor manufacturing, installation, or maintenance. Such curb defects reduce the performance of a 14-EER unit to a system performing below 10 EER. The problem is, unless you look for it, curb defects and the resulting efficiency losses are invisible.

How to Use an Air Balance Hood
Air balancing used to be a term reserved for the testing and adjusting of commercial HVAC systems. Today, in the residential and light commercial HVAC industry, the term air balancing is more accurately applied to HVAC System Diagnostics, Field Measured-Performance Verification, or Installed Efficiency Documentation.
Write Your Company Code of Ethics or Conduct

Judging from the response of my last HotMail article, interest is high with better companies looking to create their own Code of Ethics or Conduct. Let’s look at some steps you could follow to create a code for your company. I’m convinced the value of this work will pay big dividends in influencing the proper conduct of everyone in your company.

What is a Code of Ethics?

HVAC Ethics and Customer Relations

I called a plumbing service company recently to investigate a leak in our shower above the kitchen. The experience left me feeling the need to take a look at HVAC industry ethics, and how to avoid leaving our customers feeling like I did.

HVAC Testing – When is a System Stabilized?

When measuring and diagnosing the operation and performance of an HVAC system, the timing and measurement are critical. Ideally, the system should be calling for full heating or cooling, and fan speed so it can reach a stable operating condition. Let’s take a closer look at what constitutes stable operating conditions so your test data allows you to accurately diagnose the performance and operation of your systems.

Why is Stability So Important?

What It Takes To Learn a New Diagnostic Skill

YouTube and Google are valuable tools everyone uses to get the information we need right now. However, when it comes to developing new skills you can apply in your profession, there is no replacement for applying yourself to some good old-fashioned study and practice. Let’s take a look at what it takes to add a new diagnostic skill to your long list of talents.

Fan Tables Reveal Airflow Secrets
If I could make a wish, it would be to stand beside every new HVAC tech as they began work on their first system. I would have the fan table taped to the front of the unit and teach the most important task in troubleshooting - to measure the system’s total external static pressure and plot fan airflow.
Consider Writing Your Company History 1
A carefully crafted history helps to attract customers and inspires a sense of dedication in your managers and employees. Let’s take a look at the benefits of writing your company history and consider a few steps to help get you started.
Questions to Ask BEFORE Adding HVAC Services
The sweetest natural tendency in life is to grow. However, the seed must be planted at the right time and under the right conditions. So, before taking a leap of faith by adding a new service to your HVAC business, it may be wise to consider a few valuable questions.
The New Frontier in HVAC System Design
Today, service companies give away their designs, and mechanical engineering firms are trapped in the treadmill of slapping out gigabytes of production PDF plans. Let’s take a look at what premium services are now being offered to build new value into the HVAC system design and the project oversight segment of our industry.
Master Airflow Principles While Leaf Blowing

We live back in the woods on a half-acre with fifteen 100-foot tall oak trees. For years I’ve imagined sharing leaf blowing airflow lessons with my fellow airheads. Let’s take a look at the mad airflow skills you can master while blowing leaves.

Fascinating Statistics

“If you don’t measure, you’re just guessing.” So before you get to work, you’ve gotta know the numbers. Here is the leaf-blowing scenario at our home.