Category Archives: BPI Standards

The Business of Home Performance Contracting

I just sat thru a webinar sponsored by The ACHR News (magazine) and BPI that gave a pretty good high level overview of why HVAC contractors should consider getting into home performance contracting.

The slides from it are here: The Business of HPC.

The actual broadcast will be available in a few days at this LINK look under the 9-19-12 webinar listing:
Crushing Your Competition As A Whole House Home Performance Contractor

Leave a comment

Filed under BPI Standards, Customer benefits, Energy Audit, The Business of Home Performance Contracting, The Future, Uncategorized

Combustion Webinar Slides & Link to Recorded Session: COMB 100

Combustion 100 Slides

See a recorded session



Watch recorded webinars on MANY topics HERE

Leave a comment

Filed under BPI Standards, Carbon Monoxide Testing, Combustion Analysis, Energy Audit, Training

Measuring Air Flow

Jim Bergmann’s passion for correctly measuring air flow is evident in this piece!

Measuring Air Flow Tips and Techniques

Technicians and manufactures have long struggled with issues of airflow and airflow measurement.  Due to the time-intensive nature of many measurement procedures and the limited tool selection of the technician, it has been common to use gross airflow estimation methods that are uncorrected.  The temperature rise method, total external static method, pressure drop across filters or coils all examples of gross airflow estimation methods and many times are adequate for the equipment commissioning procedure, however if the desire is to evaluate equipment performance, a more accurate method is required.

The most common and easiest way to measure or with some methods estimate and set airflow is to use one of the following methods:

  1. Rotating     Vane Anemometer (Measurement, mid airflow range)
  2. Pressure     drop across the dry evaporator coil (estimate)
  3. Total     external static pressure method (estimate)
  4. Pitot     tube and digital manometer (Measurement, full range airflow measurement,     however low range requires special instrumentation.)
  5. Velocity     Stick (Hot Wire Anemometer) (Measurement, very low to mid airflow)
  6. The     temperature rise method (Sensible heat formula) (estimate)
  7. RPM     and manufacturers fan curve (Belt or VF Drive) (close estimate based     from fan curve, however limited by accuracy of static pressure measurement)
  8. Wilson     Grid (TruFlow® Grid) (estimated pressure drop measurement method)

The airflow must first be set according to the equipment design not to the air delivered at the registers. While the design of the duct system is imperative for proper air distribution to the conditioned space, air measurements are only to be measured at the appliance for the equipment commissioning procedure. Due to leakage inherent with all ducting systems, airflow cannot be measured at the registers to verify correct airflow across an evaporator coil or heat exchanger. The problem is not with the operation of the equipment if the system will not heat or cool the home after the airflow is properly set at the appliance and the equipment operation is verified to be correct.  The ducting system should then be evaluated for excessive leakage, proper sizing and proper design. A review of the heat load calculation may be required to verify the equipment selection was correct if the system still will not perform properly. Read More about measuring by specific method…

Leave a comment

Filed under BPI Standards, Training, Uncategorized

Who’s Eating Your Lunch? HVACR Business – Jan 2012 Feature

Customers Want Energy Optimized Comfort. If You Don’t Provide It, Someone Else Will. Check out our featured article in this month’s HVACR Business!

Leave a comment

Filed under Blower Doors, BPI Standards, Combustion Analysis, Thermal Imaging, Training, Uncategorized

The New BPI Home Energy Audit Standard: What’s it gonna mean to you?

Comparing the standards BPI BA and HEA

Click on the link above to down the slides from a presentation made by Bill Spohn, GM of TruTech Tools, LTD to the Ohio Chapter of Efficiency First on October 28, 2010.

An overview of what the changes in the new, upcoming BPI Home Energy Audit Standard could mean for you.

Leave a comment

Filed under BPI Standards, Uncategorized