tekmar Smart Boiler Control 294 provides domestic hot water heating by operating up to four boilers. Can be expanded in groups of four boilers up to a maximum of 16. The 294 operates condensing and non-condensing boilers that are either modulating, single, two, three or four-stage to pro-vide a flexible boiler plant solution. The Watts OnSite web and mobile applications provide real-time remote monitoring, setting adjustments and notifications.