When you create a new worker in HiveOs, you need to enter its name. This name will be used in the miner settings if required by the pool. Also, this name will be used by you to monitor the mining farm.
I don't think i named my rig, using a name with a space inside, so it's a default name set by HiveOs in the beginning of its installation.
I'm just so dazed for the fact HiveOs uses names with a space inside, as a dafault behaviour, since that name is also used for the miner pool configuration that uses just that name as the ending part of a fundamental string such as "walletAddress.workerName".
Just that.