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have a problem job,that we recently got involved at a commercial kitchen.the system that was installed by others, is a 15 ton trane split system.the unit on a design day,above 90 degrees will not maintain a room temperature below 80. i have found that the system is within 10% of 6,000 cfm,both compressors are at full capacity,12 degree superheat and 15 degrees of subcooling.the only thing that i can come up with is the system is not large enough to handle the load of the kitchen equipment.i have a list of the pieces of equipment and was wondering is the best way to calculate the load would be to contact the manufacturers and get the heat output in btu,s.or is there a better way to go about this.they are many differant manufacturers and the total pieces is sixty four,so obviously this will take some time.not including the hoods there are two large air cooled walk in boxes,twenty commercial refrigerators,and one air cooled ice machine.looking for suggestions,and any assistance would be much appricated. thank you.