An indirect water heater, flexible to your system. Whether it’s a boiler or multi-fuel setup, HX can plug into what you already have. Side-mounted heat exchangers and multiple plumbing connection sizes let contractors match HX to the jobsite layout. Plus, heat exchangers are field-removable for easy servicing. HydraStone™ cement lining protects the tank from corrosion, eliminating the need for an anode rod— even in harsh hot water conditions. 2" of polyurethane foam insulation reduces standby heat loss. Electronic controller with adjustable differential maintains tight temperature accuracy. Non-metallic jacket won’t rust or dent.