Grundfos and Thermal Solutions, the commercial condensing division of Burnham Holdings has partnered by incorporating Magna 3 circulators to their control logic. In short, the “Eco-Propel” controls allow the boiler to communicate with the pump to adjust to the systems demands. By doing so, the boiler can attain the required delta T to condense.

In more detail, the Magna 3 Eco-Propel Variable Speed Pump Magna 3 Kit is pre-engineered to integrate with boiler firing rate control ensuring efficient temperature control while maximizing electrical energy savings.  Boiler pump speed demand is calculated based on supply and return temperatures, and boiler firing rate.

Heating systems are designed for a specific differential temperature or delta T across supply and return temperature.  Standard fixed speed boiler pump systems allow the differential temperature to change as the boiler load changes.  For example, as the boiler firing rate modulates from high to low fire standard fixed speed boiler pumps over pump and cause system differential temperature to drop. 

Eco-Propel continuously adjusts pump speed to maintain a constant differential temperature as the boiler firing rate modulates.  The result lower return temperature boosting efficiency and minimized electrical usage.  The Eco-propel system provides the following benefits:

Matches Boiler Pump to Boiler: Boiler pumps are generally oversized. The Eco-propel kit is factory tuned to produce an optimized match of boiler pump to boiler and piping. Energy is saved by preventing over pumping over the full modulation range.

Helps Increase Boiler Efficiency: Standard constant speed boiler pumps allow return temperature to increase as firing rate is reduced. This is due to the excessive water flow rate across the boiler. Eco-Propel decreases pump speed as the firing rate decreases helping to maintain more efficient, lower return temperatures.

Below are pre-engineered Eco-Propel APEX series boiler designs (425-825 MBH) from that include the boilers, Magna 3 series and Spirotherm Quad combination hydraulic separators/air & dirt eliminators.

Below are pre-engineered Eco-Propel AMP series boiler designs (1000-4000 MBH) designs from that include the boilers, Magna 3 series and Spirotherm Quad combination hydraulic separators/air & dirt eliminators.

For additional information on Eco-Propel or Magna 3 series, please contact your local wholesaler or rep agency.