Department of Energy (DOE) Net Capacity values are tested and reported per the DOE 2020 AWEF WICF testing condition using the AHRI 1250 test method. All commercial refrigeration equipment manufacturers are required to test to these standards. Capacity and AWEF values must be submitted to the DOE CCMS database.
Test validated values are to be published in CCMS database
DOE values in published literature match CCMS database
DOE “net capacity” always stated by title & same value
Medium Temperature 10ºF TD, 25ºF SST & <50% Relative Humidity (RH) (this equates to a dry coil condition)
Low Temperature 10ºF TD, -20ºF SST & <50% RH (this equates to a dry coil condition).
The DOE Net Capacity values are provided in Heatcraft technical literature, along with AWEF values.
Application Capacity is capacity associated with a nominal 10°F TD, 25°F/-20°F SST application condition historically established to successfully size equipment and components to satisfy a heat load, net of all influences, in an application.
3. How did Heatcraft derive Application Capacities?
Heatcraft considered the following factors when deriving Application Capacities:
Precise capacity values derived from lab testing and simulation at a wide range of test conditions (including TD, %RH, SST and others) that a unit typically encounters in real world applications
The DOE mandated Net Capacity values
Historical capacity values that have been proven to work in unit selection systems over the past several decades
Modifications in the coil sizes or circuiting in order to achieve AWEF compliance minimums that, in some cases, also led to increases in capacity levels
An overarching focus to publish values that are aligned with and supported within the bounds of the lab-tested and simulated capacity values mentioned in #1 above
4. What is the difference between Application Capacity and Net Capacity?
Net Capacity is capacity derived using the AHRI 1250 test method as specified by DOE. It represents a unit’s capacity under very specific and controlled set of test conditions.
Application Capacity on the other hand represents a unit’s operating capacity in real world operating conditions and should not be compared to the Net Capacity values.
5. If I use DOE net capacity, will I select the right equipment for my application?
The Net Capacity is actually a Test Capacity at a specific Test Condition. As with all equipment selections, the Application Capacity should be used. The Net Capacity is best used for comparison of baseline lab test performance between manufacturers. As mentioned above, the Net Capacity, as a Test Capacity, is only true at the stated conditions, in a lab environment, tested per the AHRI 1250 standard.
6. Are all commercial refrigeration manufacturers following the same approach?
Heatcraft encourages all manufacturers to follow this approach, which provides a consistent and more practical industry approach that serves its customers’ best interest.
Heatcraft is working with AHRI to establish agreement among member companies on a standard approach. Next steps include setting up a working group to determine a plan of action.
7. Frequently Asked Questions
Q1. What capacity should I use to select equipment?
A1. Use the Application Capacity to select equipment just as you’ve done for the past many years.
Q2. What capacity will THE HUB use?
A2. THE HUB uses Application Capacity.
Q3. Did Heatcraft publish standardized capacity values for their legacy models?
A3. Historically, the industry has not been regulated to use a standardized test method and rating condition for capacity determination.
Q4. Why is this suddenly a topic of discussion today?
A4. The industry wasn’t regulated until now and the new regulations provide standard test methodology and test conditions at which a standardized capacity (DOE “net capacity”) must be determined and published.
Q5. Why can’t I just use the nominal capacity from a competitor’s model and match it to the HRP’s model capacity? Why must I review the DOE capacity – sounds like too much work to me.
A5. All OEM’s must report Net Capacity to the DOE where meeting AWEF standards is required, based on AHRI’s 1250 testing conditions; this is the first time in the refrigeration industry that we have standardized tested capacity data. Because the certified DOE Net Capacity is the equalizer for all OEM’s, it is the reason we strongly recommend that we utilize the DOE Net Capacity for competitive capacity comparison purposes.
8. Once in the CCMS database, how do I navigate the site to search for the refrigeration equipment manufacturers?
To proceed to the general refrigeration equipment database, please select and click on “Walk-in Coolers and Freezers – Refrigeration Systems” from the drop-down menu in the “All Product Groups” field.
Finally, the main equipment page gives you a few options to locate and research the equipment: a) you can search by Model Number, b) find by Brand Name(s) via the table columns or c) download the database in a *.csv datafile, which can be opened in Excel.
9. Does Heatcraft have any additional resources or information about DOE and Net Capacity that I can read?
Yes, you can visit our DOE specific site, which covers several aspects of the DOE regulatory landscape, as well as general Q&A information that can be very helpful to answer some commonly asked questions.
Note: FAQs are continuously being added to this section as we learn more on this important topic from our customers.
This information is provided for informational purposes only and is based on information, legislation and litigation activities that are subject to change on short notice. The information provided should not merely be relied upon without consideration of your particular situation or any additional unique facts and circumstances. Moreover, the laws are subject to change. We recommend that you review the applicable laws and regulations and consult legal counsel, if necessary, to ensure you are in compliance with the regulations.
Heatcraft Refrigeration Products provides climate-control solutions for commercial refrigeration and industrial applications. We manufacture unit coolers, condensers, compressorized racks, condensing units, refrigeration systems and supermarket display cases through six market-leading brands, including Bohn, Larkin, Climate Control, Chandler, and InterLink. Heatcraft Refrigeration Products is a business segment of Lennox International Inc., a leading global provider of climate-control solutions.