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.
Selection Capacity values represent capacities at conditions more comparable to historically advised capacities and more typical of customer application conditions.
Medium Temperature Selection Capacity Rating Condition: 25°F SST, 10°F TD, 80% Relative Humidity (RH) (this equates to a wet coil condition)
Low Temperature Selection Capacity Rating Condition: -20°F SST, 10°F TD, <50% RH (this equates to a dry coil condition).
To make the published values more useful to customers for selection purposes, Heatcraft is committed to publishing selection capacity values that align with the as-tested or simulated results at the stated conditions, published with the same level of accuracy called for in the DOE regulation.
3. How does Net Capacity benefit Heatcraft customers?
The new 2020 Department of Energy WICF regulation for the commercial refrigeration industry prescribes an AHRI test standard for performance of the commercial refrigeration equipment purchased, and all OEMs must test to this new standard.
Net capacity is a test validated capacity that can be used to directly compare between manufacturers and to identify equivalent coils.
4. What is Heatcraft’s approach to capacities (testing and publication)?
Heatcraft will be publishing both selection capacities and DOE net capacities in its technical bulletins.
To re-emphasize, in order to make the published capacity values more useful to customers for selection purposes, Heatcraft is committed to publishing selection capacity values that align with the as-tested or simulated results at the stated condition, published with the same level of accuracy called for in the DOE regulation.
5. 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.
6. What are the implications of publishing selection capacities that closely follow the as-tested values?
This approach will likely lead to the new capacity values being lower than previously published values. For end users, OEMs and wholesalers, it is critical to note that the published values will now represent the capacity that the unit is expected to achieve at the published test conditions and design engineers should adjust their approach accordingly. In replacement situations, the simple rule is that if a coil achieved the needed performance in the past, the new equivalent coil will provide similar performance. For specialized applications, the customer should perform due diligence to make sure that the new coil has similar characteristics like air throw, dimensions, electrical loads, etc. Heatcraft has several cross-reference tools and THE HUB available to assist in such cases.
7. Frequently Asked Questions
Q1. If I have an application that calls for <50% RH and a room condition close to the DOE test rating, can I use the DOE Net Capacity instead of the Selection Capacity table? If not, why?
A1. Yes, you can use the DOE Net Capacity if the application conditions are similar.
Q2. 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 net capacity?
A2. All OEMs must report the DOE Net Capacity based on AHRI’s 1250 test conditions and standard. This is the first time the commercial refrigeration industry must report standardized capacity. Since the DOE Net Capacity is standardized for all OEMs, we strongly recommend that you utilize the DOE Net Capacity for competitive capacity comparison purposes.
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.