www.pmmag.com/articles/90769-lochinvar-armor
Lochinvar Armor
October 1, 2007

The 98 percent thermally efficient Lochinvar Armor with a condensing stainless-steel heat exchanger is available in five commercial models. With 5:1 turndown, it eliminates wasted fuel and significantly reduces operating costs. It includes a built-in cascading sequencer for installations using up to eight water heaters.
Circle 40