Cast iron boiler Viadrus U68 Hercules for coal and wood

Cast iron boiler for wood Viadrus U68 Hercules

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Pdf Viadrus U68 Hercules

Manufacturer: VIADRUS

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Laddomat 21 or...
Laddomat 21-60 with electronic pump - R32
514,29 USD
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Wood cast iron boiler Hercules U68 from Viadrus

Hercules U68 boiler by Viadrus is a pyrolytic cast iron boiler with manual loading of fuel for ecological wood burning. The boiler can operate in gravitational heating systems without the use of a pump. The combustion chamber has been designed in such a way as to enable fuel combustion with natural exhaust extraction without the use of a fan.

10-year warranty on the cast iron body
low draught requirements for chimney draught
Effectiveness up to 90.7%
meets the conditions of 'Ekodesign'.
meets the requirements of emission class 5 according to ČSN 303-5
long service life of the Czech cast iron exchanger
water-cooled solid grates
low fuel consumption
easy to operate and maintain
threaded ferrules for easy installation
low exhaust temperature (approx. 140 - 180 °C)
operation without electrical power supply (without forced exhaust gas extraction and without circulation pump, except for systems with buffer tank)

Number of sections	unit	5	6	7	8	9
Energy efficiency class	•	A+	A+	A+	A+	A+
Energy efficiency index EEI	•	114	114	117	116	116
Rated heating output	kW	14	18	23	27	34
Boiler class according to EN 303-5	[-]	5
ECODESIGN	[-]	+
Efficiency	%	88,3	88,7	90,5	90,7	90,3
Firebox depth	mm	255	255	365	475	585
Recommended firewood length	mm	350
Firebox capacity	l	32	32	45	59	73
Fuel burn rate	kg/h	3,7	4,3	5,3	6,9	8,5
Flue gas temperature	[ºC]	140 - 180
Dimensions - Height × Width	mm	1160 x 683
- Depth (A)	mm	890	1000	1100	1220	1330
Dry weight	kg	348	413	485	503	549
Chimney connection diameter	mm	160
Required chimney draught	Pa	14	15	16	18	25
Water capacity	l	40,5	46,5	52,5	58,5	64,5
Heating water temperature range	[ºC]	60 - 80
Return water minimum temperature	[ºC]	50
Heating / return water connection	-	2"
Working / testing water overpressure	bar	4/8
Maximal fuel weight in firebox	kg	13	13	18	22	25
Seasonal energy efficiency	%	78	78	80	79	79

Dimensions of the boiler

Boiler size - Number of parts	-	5	6	7	8	9
Length A	mm	890	1000	1100	1220	1330
Length B	mm	620	730	840	950	1060

Data sheet

Power [ kW ]	34
Power [ kW ]	27
Power [ kW ]	14
Power [ kW ]	23
Power [ kW ]	18
Efficiency [ % ]	90.3
Efficiency [ % ]	83
Efficiency [ % ]	90.7
Efficiency [ % ]	90.5
Efficiency [ % ]	88.7
Weight [ kg ]	485
Weight [ kg ]	413
Weight [ kg ]	505
Weight [ kg ]	348
Weight [ kg ]	548
Depth [ mm ]	1,100
Depth [ mm ]	1,001
Depth [ mm ]	1,225
Depth [ mm ]	1,330
Depth [ mm ]	890
Water capacity [ L ]	52.5
Water capacity [ L ]	58
Water capacity [ L ]	46.5
Water capacity [ L ]	64.4
Water capacity [ L ]	40.5
EcoDesign	YES
Class	5
Height [ mm ]	1,160
Width [ mm ]	683
Installation	Vertical, Floor, Internal
Grate bar	YES
Ventilator	YES
Fuel	wood, black coal