I usually don’t go by time on mine. I usually touch the top of the head regularly.But if I would had to guess, it would be around three minutes. And it don’t take long at all for mine to fill up the 3000 psi. After it reaches that amount it starts to take a little longer. Heat is your enemy. So that’s why I don’t really pay attention to the time. If mine gets to where I can’t hold my hand on top of it for more than a couple seconds,Then it is too hot.I’ll shut it off for a few minutes and touch the head again and if it feels normal then I start it back up.