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EKO DUO 15 Hybrid Coal Boiler, 65K BTU

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Hybrid Coal Boiler — EKO DUO

EKO DUO 15 Hybrid Coal Boiler, 65K BTU

Heating Capacity: Up to 2,500 ft²

Smallest EKO DUO model for homes and mid-size hydronic projects needing coal-primary multi-fuel flexibility.

Model
EKO DUO 15 - 65K BTU · Up to 2,500 ft²
$7,457
$5,96520% OFF

Shipping$1,268Free

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What EKO DUO 15 Hybrid Coal Boiler, 65K BTU Works With

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  • UNI wood boiler installed in a green mechanical room beside a vertical water storage tank.
  • UNI wood boiler installed beside an expansion tank and copper hydronic piping in a mechanical room.
  • UNI wood boiler installed with copper hydronic piping, pumps, valves, and temperature controls.
  • MBTEK boiler system with a black and orange cabinet unit and orange hopper in a utility basement.
  • Side view of an orange EKO Duo hybrid coal boiler and integrated fuel hopper in a concrete mechanical room.
  • Side view of an EKO Duo boiler with closed access doors and digital controller in a mechanical room.

Installed in real homes and workshops

Customer Success Stories

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.

Product details

  • Multi-fuel versatility
  • Extended autonomy
  • True hybrid system
  • Smart continuous cycle

EKO DUO 15 Hybrid Coal Boiler, 65K BTU

Automatic self-cleaning hybrid coal boiler for smaller hydronic systems, combining multi-fuel flexibility, smart control, and long unattended operation in a compact EKO DUO platform.

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: 65,000 BTU
  • Recommended Area: 2,500 ft²
  • Automatic Fuel Range: Coal up to 1 1/4"; also burns pellets, grains, and biomass
  • Manual Firebox: 18 gal with up to 15" logs
  • Hopper Volume: 72 gal / 585 lb of coal
  • Dimensions / Weight: 43" W x 25" D x 62" H; 1,000 lb
  • Coal Types: Anthracite and bituminous; rice, buckwheat, pea, and stoker sizes
  • Warranty: 10 years
Capacity (modulation range)
27–68 KBTU
Heat area
Up to 2,500 ft²
Relief valve
30 psi
Water volume
21 gal
Connection
1½ in
Chimney
6 in
Hopper volume
72 gal

Complete the system

What EKO DUO 15 Hybrid Coal Boiler, 65K BTU Works With

APOLLO DHW80 - Stainless Indirect Water Heater Tank - 80gal

Water heater tank

Store heat and make hot water

The combined buffer and indirect tank stores boiler heat and supplies household hot water — no separate water heater needed.

View details
Model
DHW80 · 80 gal
$2,912.50
$2,33020% off

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Complete your system

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