I may have to think about this. I mean if I can rationalize it as a practical home improvement that just coincidentally has brewing applications. Is Hydra really better than a 50’ immersion chiller? That’s $170 for the chiller and more bucks for plumbing for a few minutes of savings per brew day.
But, I guess knowing thermodynamics is your $&@#% is priceless.
No, in fact it's not any more efficient
when you look at it: Hydra at 6gpm reportedly does the same job in 3 minutes as my chiller at 1gpm in 18 minutes. That's 18 gal of water either way to go to 10F above groundwater. Or, in my case, 10F above prechilled water temperature, well below groundwater, so really my rig gets more bang for the gallon, if you will. But if you already have 6gpm flow available, and you're buying your first chiller, and don't want to build one, it would at least be worth considering. And if I ever had to replace mine, I'd think about it. Time and materials, I probably am into it for not too much below the price. But then the Hydra would require a pump to finish the job with ice water, so that changes the equation. Again, if you already had a pump available, and the right water supply, worth looking at. It's not for me right now.
But now I'm thinking about that spigot. I could run my RO off that instead of the utility sink in the basement, at even higher pressure differential for better rejection, and not lug the water upstairs. And maybe someday a different chiller. But I've got a lot of projects that are queued up way ahead of this.