Durastar DRHTR20BRKB 20kW Auxiliary Electric HeaterDurastar DRHTR20BRKB 20 kW Auxiliary Electric Heater Module Equip your air handler for maximum heating performance with the Durastar DRHTR20BRKB, a 20 kW auxiliary electric heater engineered for heavy duty, efficient supplemental heat in compatible Durastar systems. Maximum Dual Circuit Heating Power Provides a full 20 kW of additional heat via a dual circuit design, ensuring consistent warmth in the harshest winter conditions. Extensive Model