I don’t know if your first post here is plugging a web page, or if you really are curious on effective wort chillers. I use an immersion chiller made by Jaded. It’s called Hydra. It will chill a 5 gallon batch to 140° in 45 seconds, and to 68° in 3 1/2 minutes. That’s what I use. Easy to clean, and quick to chill.