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Hybrid Coal Boiler — EKO DUO
EKO DUO 35 Hybrid Coal Boiler, 130K BTU
Heating Capacity: Up to 4,000 ft²
Automatic multi-fuel hybrid coal heat for homes and mid-size hydronic projects.
Model
EKO DUO 35 · 130K BTU · Up to 4,000 ft²
- EKO DUO 15 · 65K BTU · Up to 2,500 ft²
- EKO DUO 35 · 130K BTU · Up to 4,000 ft²
- EKO DUO 55 · 200K BTU · Up to 6,000 ft²
- EKO DUO 95 · 330K BTU · Up to 9,000 ft²
- EKO DUO 150 · 500K BTU · Up to 15,000 ft²
- EKO DUO 300 · 1000K BTU · Up to 32,000 ft²
- EKO DUO 500 · 1700K BTU · Up to 50,000 ft²
- EKO DUO 1000 · 3400K BTU · Up to 64,000 ft²
$9,120
$6,38430% OFF
Shipping$1,550Free
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Installed in real homes and workshops
Customer Success Stories
We replaced our aging system with this MBtek wood boiler and the savings were immediate. It burns so efficiently, we're using significantly less wood to get much more consistent, powerful heat. It's transformed our monthly budget.
Slash Your Heating Bills
Maximize savings with high-efficiency automated wood chip combustion.
Product details
- Multi-fuel versatility
- Extended autonomy
- True hybrid system
- Smart continuous cycle
EKO DUO 35 Hybrid Coal Boiler, 130K BTU
Automatic self-cleaning Hybrid Coal Boiler for mid-size hydronic heating systems, designed to pair strong output with multi-fuel flexibility and advanced EKO DUO combustion control.
Key Benefits
- Automatic self-cleaning burner with rotary cast iron design for reliable solid-fuel combustion
- Flexible multi-fuel capability for coal, pellets, grains, and biomass up to 1 1/2", plus manual feeding for wood chips and peat briquette
- Guaranteed 90% efficiency with a design focused on complete heat recovery
- TIS tronic 481R controller manages combustion, pumps, mixing valves, storage, and hydronic operating modes
- Extended autonomy from the automated hopper and ignition strategy reduces day-to-day intervention
- Front-access maintenance with ASTM A106 boiler steel construction and wide cleaning access
Specifications
- Heating Capacity: 130,000 BTU
- Recommended Area: 4,000 ft²
- Automatic Fuel Range: Coal up to 1 1/4"; also burns pellets, grains, and biomass
- Manual Firebox: 22 gal with up to 19" logs
- Hopper Volume: 111 gal / 902 lb of coal
- Dimensions / Weight: 58" W x 34" D x 56" H; 1,300 lb
- Coal Types: Anthracite and bituminous; rice, buckwheat, pea, and stoker sizes
- Warranty: 10 years
| Capacity (modulation range) | 51–137 KBTU |
|---|---|
| Heat area | Up to 4,000 ft² |
| Relief valve | 30 psi |
| Water volume | 32 gal |
| Connection | 1½ in |
| Chimney | 6 in |
| Hopper volume | 111 gal |
- Capacity (modulation range)
- 51–137 KBTU
- Heat area
- Up to 4,000 ft²
- Relief valve
- 30 psi
- Water volume
- 32 gal
- Connection
- 1½ in
- Chimney
- 6 in
- Hopper volume
- 111 gal
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