Danish to English Other Construction / Civil Engineering Letter of reference from construction firm

Both of the words "sauna and badestue" appear in the same sentence, as those they were two different types. I had always taken a badestue to be a sauna, so I wonder if anyone knows the difference. One of the sentences they appear together in is:

"XX var ansvarlig for opbygningen af alle saunaer og badestuer ..."

Thanks in advance!