What is known about the coding sequence of Factor H in the human genome?
As clearly stated in the WP article:


  The molecule is made up of 20 complement control protein (CCP) modules (also referred to as Short Consensus Repeats or sushi domains) connected to one another by short linkers (of between three and eight amino acid residues) and arranged in an extended head to tail fashion.


So in your terminology yes, it is a repeat cluster. Each of those 20 domains will be similar to the others, although not identical.