Well, I'm not sure about making hash from vaped. It is more for edibles and tinctures. Here's what I've gathered. I don't quite understand. My experience is dabbing vaped that had been evaporated after QWISOing.
When we decarb in the oven, we are only converting THC-A into THC. We are not vaporizing it. The decarbed weed is then processed into whatever extraction is wanted. The trichomes are still there and have not been destroyed by the higher heat of vaporization or combustion.
When we vape weed in a vaporizer, temperatures run higher than oven decarbing. Same-same with pipe resin and reclaim. But they will still get you high. If you haven't tried, vaped weed in a bowl will still get you high.
If you try to make hash, you'll get ash since the ash is probably finer than the trichomes. If you evaporated a filtered ethanol wash, it will get rid of some/most of the ash.
Fiiiinally... if you have ash in what you are vaping, you are not vaping. You are combusting and I'd probably not use it for anything. But that's me.