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 Measure Commercial System Efficiency

It’s just not fair. Some contractors have a distinct advantage in the marketplace over their competitors; they ruthlessly and knowingly measure the live operating efficiency of HVAC systems. With the knowledge they gain, they diagnose and prescribe solutions to system defects that others don’t even know exist. Their prices are much higher and the efficiency of their systems far exceeds their competition. Let’s take a look at why the gap between everyday HVAC contractors and Performance-Based contractors is widening.

Best of Rob ‘Doc’ Falke

Rob ‘Doc’ Falke has been writing articles for the Hotmail newsletter for quite some time. His technical knowledge and expertise have filled his articles with information that contractors use for reference and continue to come back to to read, even months or years after it’s been published. Below is a collection of ‘best-of’ articles for your reference and enjoyment!

A Blunt Look at the Evolution of HVAC System Efficiency
Let’s take a peek at the evolution of HVAC efficiency from 40 years ago to today to see if we can imagine where it might be headed in the future.
Air Balancing and Energy Savings
Let’s take a look at how new air balancing reports are placing manufacturer specifications and measured field data side-by-side to prove how efficient an installed system is operating.
The 12,000 BTU/Ton Assumption
It’s a really a hot summer afternoon. Your customer calls complaining the air conditioning isn’t keeping up. One valid reason it may not be keeping up is because the capacity of the equipment actually goes down as the outdoor temperature goes up.
Three Ways to Check Duct Sizing in the Field
This quick and simple test method allows you to assess the performance of supply and return ducts by measuring duct system pressures. Then compare the pressure to a duct system pressure budget. If the pressure is higher than the budget, the ducts may be too restrictive to airflow.
Going Beyond Equipment Replacement
In the HVAC Industry, we always have and always will replace equipment.
The Quiet Protest to Building Permits 6
Unfortunately very few HVAC contractors regularly pull permits when replacing equipment and upgrading systems. Let’s examine their reasons why.
Use the Air Changes Calculation to Determine Room CFM 1
Engineering room airflow may present a real challenge when balancing an HVAC system. Most calculations only use the heat loss or gain of a room to decide on required airflow and often don’t take into consideration required room ventilation needs.
Why Add Duct Renovation to Equipment Replacement?
Duct renovation refers to the process of testing, diagnosing, repairing, and balancing duct systems. Typically this service is offered to a customer at the time a contractor proposes an equipment replacement, although more contractors are including this offering with a service call when the need is apparent.
Rooftop Curb Diagnostics and Solutions
A recent evaluation of several hundred commercial rooftop systems around the country exposed a hidden flaw that deteriorates system efficiency up to 40% Rooftop equipment curbs. Let’s take a look at how you can quickly diagnose and solve curb problems you may encounter in the field.
How to Charge What You’re Worth
Cost + overhead + a fair profit is the basic formula used by the HVAC industry to determine the price of a typical repair or equipment replacement. The net result of this practice is an average company net profit of 2% to 3% year-after-year. Let’s take a look at what some companies have learned to do to earn profits on some of their work that is ten times the industry average.
A Service Legend Remembered
With the passing of my father, Walt Falke this week, it seems there is nothing more important or appropriate to write about than the legacy Dad left behind to this industry.
Simplified Pressure, Temperature, and Airflow Diagnostics
Diagnosing the performance of an HVAC system is simple if you master the art of profiling. Profiling consists of taking a series of measurements across a system and subtracting to quickly find the cause of the system defect. Let’s take a look at how you can add profiling to your daily diagnostic routine.
An Industry of Opportunity
Let’s take a look at what opportunities each of us may have in the HVAC industry and how we can produce the best possible results in our own careers.


May 12, 2015

How to GET and KEEP More of the Business You Want

It costs $1 to keep a customer, $7 to get a new one. Attend this webinar and learn how you can you keep more of the business you have, improve close ratios and manage your business more effectively and efficiently....More
Jun 2, 2015

Speeding up HVAC Field Processes

This webinar will cover how to overcome the pain points associated with HVAC and Plumbing paper form processes, and detail the benefits of switching to mobile forms for field data collection....More


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Jul 15, 2015

RIDGID RV1650 Motor On Bottom Wet/Dry Vac

You’ve never seen anything like this before. The newest innovation in wet/dry vacuum technology has arrived....More
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