Advantages of a combined boiler
Two heating sources
Combine two heating sources at a reasonable price.
Modern approach
Simple manual control, which is modernly processed.
Small boiler size
The boiler can also fit in small and low boiler rooms.
Money in the house
Low purchase price and high efficiency significantly save your costs.
The H4EKO-U coal boiler with a pellet burner meets the requirements of users who prefer economical heating and at the same time want an alternative heating source.
Easy Operation
- The coal boiler has a large hopper so that you don't have to refill too often.
- It combines two heating sources.
- Easy to regulate
Economic operation
- Efficiency up to 84.2 %.
- Low fuel and electricity consumption.
- It belongs to emission class 4./5. and meets ecodesign conditions.
Small size
- It is also suitable for small boiler rooms with low ceilings.
- Boilers with an output of 16 kW and 20 kW can also fit through a 60 cm width.
Boilers long service life
- Warranty 5 years
- The boiler sheet thickness of 5 mm guarantees a long service life
| Boiler model | H4EKO 17 PELLET | H4EKO 18 PELLET | H4EKO 19 PELLET | |
| Guaranteed fuel | / | wooden pellets 6-8 mm | ||
| Nominal output | kW | 17 | 18 | 19 |
| Measured nominal output | kW | 16,4 | 17,4 | 18,4 |
| Measured minimal output | kW | 5 | 5,2 | 5,4 |
| Emission class according to ČSN 303-5:2013 | 5 | |||
| Efficiency nominal/minimal output | % | 91,2/89,6 | 91,8/90,25 | 92,4/90,9 |
| Fuel consumption (min./max output) | kg/h | 1,2-3,8 | 1,3-4 | 1,3-4,3 |
| Operating chimney draft (min./max output) | Pa | 3,7-5,6 | 3,7-5,6 | 2,7-4,3 |
| Average flue gas temperature | °C | 70-105 | 66-98 | 62-90 |
| Connecting voltage | V/Hz | 230V/50Hz1-10% | ||
| Ele. input operating/maximum | W | 20-49/375 | ||
| Noise | dB | 50 | ||
| Appliance coverage | / | IP21 | ||
| Fuel consumption at nominal output (16800KJ/kg) | kg/hod | 2,747 | 3,287 | 3,827 |
| Water volume | l | 32 | 36 | 44 |
| Boiler weight | kg | 217 | 241 | 253 |
| Guaranteed fuel | / | brown coal nut 1 | ||
| Nominal output | kW | 16 | 20 | 25 |
| Emission class according to ČSN 303-5:2013 | 4 | |||
| Efficiency | % | 84,2 | 84,2 | 85,5 |
| Fuel consumption | kg/h | 2,5 | 3 | 4,1 |
| Burning time at nominal output | h | >4 | >4 | >4 |
| Flue gas temperature at nominal output | °C | 253 | 226 | 200 |
| Operating chimney draft - prescribed | Pa | 22 | 22 | 22 |
| Operating chimney draft - minimal | Pa | 15 | 15 | 15 |
| Dimensions | ||||
| Outlet/inlet socket type (female thread) | G1 1/4" | G1 1/4" | G1 1/4" | |
| Cooling loop connection (female thread) | G 1/2" | G 1/2" | G 1/2" | |
| Connection for draining and filling (female thread) | G 1/2" | G 1/2" | G 1/2" | |
| Connection for mouting the power regulator (female thread) | G 3/4" | G 3/4" | G 3/4" | |
| Boiler body wall thickness (water/flame) | mm | 5 | 5 | 5 |
| Max.heating water overpressure | MPa | 0,2 | 0,2 | 0,2 |
| Heating water test overpressure | MPa | 0,4 | 0,4 | 0,4 |
| Hydraulic loss at ∆T=20/10K | mbar | 1,6-5,9 | 1,4-5,4 | 1,1-4,8 |
| Flue diameter | mm | 130 | 130 | 159 |
| Fuel shaft capacity | l | 33,5 | 40 | 55 |
| Filling hole dimension | mm | 176x256 | 176x306 | 176x405 |
| Heating surface | m2 | 1,9 | 2,1 | 2,5 |
| Heating water temperature range | °C | 65-90 | 65-90 | 65-90 |
| Assembly dimensions | ||||
| Boiler assembly | H4EKO 17 Pellet | H4EKO 18 Pellet | H4EKO 19 Pellet | |
| Boiler type | H416EKO-U | H420EKO-U | H425EKO-U | |
| Dimensions | ||||
| C-boiler height | mm | 960 | 960 | 960 |
| C1-boiler height with open lid | mm | 1615 | 1615 | 1615 |
| D-boiler width | mm | 651 | 701 | 801 |
| Q-tank height | mm | 1310 | 1310 | 1310 |
| A-total boiler widht incl. tank | mm | 1748 | 1798 | 1898 |
| E-boiler depth with 2m feeder | mm | 1170 | 1170 | 1170 |
| B-height of boiler assembly with 2m feeder | mm | 1568 | 1568 | 1568 |
| I-burner depth | mm | 273 | 273 | 273 |
| I2-burner width | mm | 242 | 242 | 242 |
| J-total boiler depth inc.burner | mm | 1145 | 1145 | 1145 |
| D2-distance from the side fairing of boiler to center of flue | mm | 215 | 240 | 290 |
| K-tank width | mm | 810 | 810 | 810 |
| L-tank depth | mm | 810 | 810 | 810 |
| M-control unit width | mm | 178 | 178 | 178 |
| F-placing the inlet water nozzle from the ground to the center of the outlet | mm | 109 | 109 | 109 |
| G-placing the flue from the ground the center of the outlet | mm | 635 | 635 | 635 |
| H-placing the outlet water nozzle from the ground to the center of the outlet | mm | 791 | 791 | 791 |
Conversion kit for DOR boilers
Do you want to replace the DOR boiler with a new OPOP? Use our conversion kit so that the new boiler fits easily into the system.
Product informations
Technical documentation