The GreenChill Advanced Refrigeration Partnership
GreenChill Store Certification Protocol for a Commercial
Refrigeration Rack with an Air Conditioning Load
For the purposes of applying for GreenChill Store Certification, the following document describes the protocol
used to determine the refrigerant charge and total load of stores that have a commercial refrigeration rack
with an air conditioning (A/C) load.
How to Report Your Store's Total Load (MBTU/Hr.):
As described in the GreenChill Store Certification Program Guidance, a store's total load shall include all BTUs
associated with refrigeration. It SHALL NOT include sub-cooling, heat of rejection, pump heat, or any BTUs
associated with an A/C load. Therefore, if your commercial refrigeration system includes a rack that has BTUs
associated with an A/C load, these BTUs SHALL NOT be included in the total load calculation.
How to Adjust the Refrigerant Charge for a Given Rack:
If your store has a commercial refrigeration rack with an A/C load, you are allowed to adjust your reported
refrigeration charge in order to subtract the refrigerant associated with the A/C load. To adjust your
refrigeration charge, follow the steps below:
Step 1: Calculate the percent of refrigerant charge in Rack X that is used for A/C:
Total A/C load on Rack X (BTUs)
Total Rack Xload (BTUs)	" % f	>- Back X used for A/C
Step 2: Calculate the refrigerant charge for Rack X:
Total refrigerant
charge in Rack X
Please direct any questions to Keilly Witman at witman.keilly@epa.gov or 202-343-9742.
RENTAL PROTECT,
/^Rigeration
Total refrigerant
charge in Rack X
% of refrigerant charge in
Rack X used for A/C
Rack X refrigerant charge
used for commercial
refrigeration
www.epa.gov/greenchill
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