I'm working in a Copeland compressor, model CF12K6E-TF5, and want to know how many horse power of capacity is, the name plate don't say anithing about it.

Accord with Copeland handbook, compressor nominal capacity in this case is 12000 (I assume are BTU's). If this is correct, compressor capacity would be One ton.

But, what is the relationship between BTU's and horse power?. A friend says that when a compressor capacity is specified just in BTU's, the relation is one to one, that mean one ton equal one HP, is that correct?.