Composite shingles warranty considerations

Another reason to consider a Solar Royal solar attic fan is that without proper ventilation your composite shingles warranty could be in question. It's not just marketing but large companies like "Owens Corning", one of the largest composite shingles manufacturers in the world, has ventilation requirements actually listed as a reason in which not to cover the warranty of their product. Here is the link to review: http://goo.gl/gw0rF (highlighted) and