I think I totally don't trust the engineering and efficiency data supplied . . . well, by anybody.

Years ago, I had made the acquaintance of the then PacFab's chief engineer, and through him, several junior working engineers. Occasionally, I could call and get the 'back-story'. Even then, before it became Pentair, it was a marketing driven company. And, the gap between what was supposed to be true, and what was true was significant.

Hayward has always been opaque, at least to me. But the mere fact that the Hayward chlorinator -- this beast:

is still sold, is evidence that Hayward can't be trusted.

That chlorinator has not worked right since it was first designed and sold, over 35 years ago. The main port is a HORRIBLE flow restriction, and is so small it literally will not pass a US quarter. And the feed rate control NEVER works right, even out of the box. They know that. But they still sell it.

So yes, I'd love to have other data.