Reliability and performance in compact sizes. bth ULTRA™ electric boilers are available in a wide variety of performance levels, from 12 kW to 36 kW, and with multiple voltage options. They can meet any—and all—of your hydronic heating needs.
Whether you need to heat a condominium or a single-family home, bth ULTRA™ is an ultra-silent solution for new installations or replacement of an existing system. Its compact size is ideal for small spaces. In addition, the piping can be connected in multiple ways, making the on-wall boiler installation very easy.

The bth ULTRA™ can be combined with an auxiliary heater for a dual-energy system. Thanks to its T2 UltraSmart® controller, the boiler provides optimal comfort with accurate temperature management. Producing no combustion or GHG emissions, the bth ULTRA™ is a highly energy-efficient and green alternative. Maintenance is simple and kept to a minimum.