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.

HVAC Game Changer: Calculating System BTUs
The amount of BTUs a system delivers into a building can be effectively calculated when system temperatures and airflows have been measured. Here's a look at the basic steps of HVAC System BTU Measurement.
4 Ways to Measure Airflow
While industry standards specifying ventilation rates are coming out of the woodwork, a practical standard describing how to measure ventilation airflows that can be applied in the field is hard to find.  Let’s take a look how you can determine residential and commercial exhaust fan airflow in the field.

Fans at Either End of the Duct

So, Not Air Balancing Yet?
Air balancing in the HVAC profession has come of age, and is now included in nearly every emerging standard requiring quality assurance.
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.
Example: A 10- ton packaged unit in a rooftop application placed on a curb.
New Commercial HVAC Static Pressure Test Methods
Static pressure measurement on commercial HVAC systems can vary significantly from one type of equipment to another. To remain savvy here's a look at the latest commercial air pressure testing techniques.
A criss-crossing of ductwork in an HVAC system makes for interesting artwork.
Is Real Efficiency from the HVAC Equipment or from the System?
Ratings for HVAC equipment mean nothing unless the duct systems is performing well. Here is a look at how duct system upgrades are necessary to make equipment perform at promised energy efficiencies.
A vew of homes in San Francisco, CA
HVAC Service: Quick Building Pressure Diagnostics
Most buildings unintentionally operate under some level of positive or negative pressure. These pressures are usually caused by a defective duct system. Could a 5-minute building pressure test be the answer to your residential HVAC customers' comfort problems?
For HVAC Service Technicians: Three-Phase Voltage Measurement Principles
In the last HotMail article, Doc described the steps required to measure single phase voltage. Many HVAC contractors and technicians wrote asking for a similar article detaining how to measure three-phase voltage. So here it is.
Air conditioning service technican checking voltage on a blower motor.
The Principals of Single-phase Voltage Measurement in HVAC Systems
Correctly measuring and interpreting voltage is essential to every HVAC professional in the field. In an effort to help field techncial professionals be more accurate, here is a look at the procedures for measuring single-phase voltage.
Do You Know How To Determine HVAC Exhaust Fan Airflow?
While HVAC industry standards specifying ventilation rates are coming out of the woodwork, a practical standard describing how to measure ventilation airflows that can be applied in the field is hard to find. Here are some tips.
Testo Temperature Measurement Device
For HVAC Systems, Efficiency Measurements Are The "Delta" Difference
When measuring the performance of an HVAC system, the term 'delta' is often used to express the difference between two measurements.
What Can You Do To Improve HVAC System Performance?

One question I often hear from HVAC professionals is "Doc, if there was just one thing I could do for each system to improve performance the most, what would it be?" Let's take a look at the answer to that question as it pertains to your specific role in this industry.


For installers, seeking just one thing you could do for every system you install, the answer would be: Assure each return duct installed in an unconditioned space is completely sealed and that the proper duct insulation has no gaps.

E Instruments MP200P MP 200 P Thermo Anemometer Manometer
Heating and Cooling Equipment BTU Measurement Basics
Since BTU measurements are necessary to verify the quality of a mechanical system installation, here are some basics on how to properly make those measuresments.
How You Can Verify the Quality of Your HVAC System Installations?
Quality is a good thing when it comes to the birth of an air conditioning and heating system. What elements of a quality HVAC installation can you verify for your customers?
Home Performance: Can HVAC Contractors Partner With Energy Raters? Why Yes They Can, and Should
For many reasons, HVAC contractors generally believe that energy raters come up short when it comes to testing and diagnosting mechanical systems. Can these two groups ever work in harmony? Indeed they can.

Nov 4, 2014

Contractors and Technology: Tools for Improving Efficiency

Join contractor technology expert, Bill Feldman and Square's, Michael Lau, to discuss how incorporating technology into your daily operations can help streamline business functions, improve efficiency and grow your business. During this webinar business owners, service managers and sales managers will gain insight on:...More
Mar 5, 2014

Comfortech 365

If you're trying to run a profitable contracting business, you need to "attend" this online event!...More

Photos & Videos
Oct 17, 2014

What Comes to Mind When You Hear RIDGID?

Fun discussions with loyal RIDGID tool users at the 2014 Pumper & Cleaner Environmental Expo -- "What comes to mind when you hear RIDGID?"...More

Newsletter Signup


Sponsored Introduction Continue on to (or wait seconds) ×