AERCO’s Innovation commercial tankless water heaters feature the Edge controller and AERguard stainless steel helical firetube heat exchanger assembly. The Edge incorporates feed-forward sensing for precise modulation of its turndown air/fuel delivery system. It fires the unit to accurately match load requirements and produce tight hot water outlet temperature control. Edge includes onboard multi-unit sequencing logic for up to 16 units without a separate sequencing panel. Wasteful overshooting and cycling are virtually eliminated, as are storage tanks, mixing valves and other temperature-averaging components in most applications. AERguard improves scale and corrosion resistance for superior reliability and long product life, the company states.