The tekmar Boiler Control 284 offers the ultimate level of flexibility in mixed boiler plant operation. Up to four boilers can be sequenced to provide a target temperature based on outdoor temperature reset, domestic hot water and a fixed set point. The control works on condensing and non-condensing boilers and modulating, single- or two-stage units. Read/write access options are available through BACnet, Modbus and tekmarNet. It also features standby primary pump operation and pump exercising and has a combustion air damper control. This flexible solution is suitable for commercial and multifamily residential heating plants and supports any combination of boiler type while saving energy with better boiler sequencing and control.