All-in-one boiler protection
Pump, valve, and thermometer in one station
Combines return-temperature protection, circulation, and temperature monitoring in one insulated assembly.
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Hybrid Coal Boiler — EKO DUO
Heating Capacity: Up to 9,000 ft²
Largest regular-tier EKO DUO for large homes and mid-size commercial hydronic projects.
Shipping$2,241Free
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Installed in real homes and workshops
I love the modern control panel on my Eko series boiler. It takes all the guesswork out of the burning process. It's surprisingly simple to dial in the settings, and it manages the heat perfectly. Total peace of mind.
Simple, Smart Heating Control
Intuitive screen and straightforward settings make operation effortless.
High-output automatic self-cleaning Hybrid Coal Boiler for demanding hydronic systems, combining extended hopper capacity with the EKO DUO multi-fuel combustion platform.
| Capacity (modulation range) | 154–338 KBTU |
|---|---|
| Heat area | Up to 9,000 ft² |
| Relief valve | 30 psi |
| Water volume | 46 gal |
| Connection | 2 in |
| Chimney | 8 in |
| Hopper volume | 238 gal |
Complete the system
All-in-one boiler protection
Combines return-temperature protection, circulation, and temperature monitoring in one insulated assembly.
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Water heater tank
The combined buffer and indirect tank stores boiler heat and supplies household hot water — no separate water heater needed.
View detailsBoiler protection
A thermostatic valve keeps return water above 130°F to reduce condensation and corrosion inside the boiler.
View detailsRemote boiler control
Connects supported PLUM controllers to Wi-Fi or Ethernet for remote monitoring, alerts, and adjustments.
View detailsVerified Google reviews from MBTEK customers across our heating and hydronic product lines.
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