Head lice treatments in US are failing

Years ago I heard about the Lousebusters system of using hot air and a comb to kill lice. It was FDA approved and killed the lice dead without chemicals. And I thought, "Amazing! Schools and others could buy this hot air blower for…say…$50 or $100 bucks, and if there’s a lice outbreak, take care of it easy peasy."
Now I see they’ve rebranded it as Airalle and sell franchise opportunities and charge people $175 for a hour long treatment that also includes lots of combing with various mousses and topical rinses? Hmm…
I still wonder what the temperature of that machine is, and if you could replicate it with just a hair dryer and a lice comb? They say it’s cooler than most hair dryers.
Here’s the original video for the Lousebuster,