 There are some moments only the forest can inspire. Find yours at discovertheforest.org. Brought to you by the U.S. Forest Service and the Ad Council. For over 50 years, farmers in Oklahoma have trusted HOTC to keep their equipment in top condition. HOTC power washers can deep clean barns, tractors, pens, machinery, and plows. HOTC's portable and stationary pressure washer models can be installed in barns and other buildings.