There is a problem with the recipe for component heat vents that a lot of people are reporting. The recipe wants heat vent 4219:1 but we craft 4219.
There still seems to be an issue with crafting component heat vents. Exact same thing still where it wants 4219:1 when we get 4219. edit: I retract the statement, seems using tyler's method of using the heat vent in a reactor to get the exact data has worked and allowed it to be used in the crafting of the component heat vents