Hydro Silver

Convenient dual-function boiler with a pellet feeder

Hydro Silver is a boiler based on the technologically advanced product, Eko Silver III. Thanks to its increased water capacity, which acts as a heat buffer, operating and installation costs are significantly reduced as there is no need to install a domestic hot water (DHW) pump.

The boiler is equipped with a copper, antibacterial coil that ensures a reliable supply of domestic hot water. The automatic heat exchanger and pellet burner cleaning function increases user convenience, making the Hydro Silver central heating boiler a solution that combines efficiency and comfort.

Coil Efficiency

The coil provides a flow rate of 1.2 to 1.5 m³/h, allowing for a power output of 49 to 61 kW.

Approximate amount of available domestic hot water:

10kW - from 120 to 175 liters
15kW - from 120 to 190 liters
20kW - from 125 to 195 liters
25kW - from 140 to 220 liters
40kW - from 215 to 300 liters

The amount of prepared water depends on the boiler water temperature settings (60-70°C).

Boiler Advantages

Warranty: 60 months on heat exchanger tightness
Stalmark burner: with a self-cleaning grate and ignition function
DHW coil: copper coils with a hygienic certificate eliminate the risk of bacteria (e.g., Legionella)
Water capacity: the large water capacity of the boiler ensures efficiency and safety
Compatible with photovoltaics: prepared for electric heater installation
Tube heat exchanger: made of certified 6mm sheet metal with automatic cleaning
Efficiency: lower electricity consumption due to the absence of a coil supply pump

Standard Equipment:

ST 978T controller supporting 5 pumps, 2 mixing valve actuators, and 2 room thermostats
Self-cleaning burner
Igniter
External sensor

Additional Equipment (paid):

WIFI RS module
ST 281 room thermostat
Control for a second mixing valve

Technical Data:

Nominal Power	kW	10	15	20	25	40
Power Range	kW	3.0-10	4.5-15	6.0-20	7.5-25	12.0-40
Heating Surface	m²	1.4	1.65	2.07	2.38	4.18
Heated Area	m²	up to 125	up to 185	up to 250	up to 300	up to 480
Max. Operating Pressure	MPa	0.15	0.15	0.15	0.15	0.15
Required Chimney Draft	Pa	10	15	15	20	20
Single Fuel Load Capacity	l	170	220	220	220	300
Water Supply Temperature [min/max]	°C	60/80	60/80	60/80	60/80	60/80
Minimum Return Water Temperature	°C	55	55	55	55	55
Boiler Weight	kg	320	355	395	430	590
Fuel Burning Time	h	40	51	35	30	21
Fuel Hopper Opening Dimensions	mm	370x370	370x480	370x480	425x315	425x315
Flue Gas Temperature at Nominal/Minimum Power	°C	99/64	116/73	148/90	136/94	121/79
Flue Gas Mass Flow at Nominal/Minimum Power	kg/h	25.2/9.7	30/12	12.1/4.6	52/20.5	27.1/9.3
Boiler Water Capacity	l	145	160	175	200	263
Minimum Chimney Height	m	6	6	6	6	8
Boiler Efficiency	%	90.5	91.2	91.5	91.7	92.1
Flue Outlet Dimensions	∅ or mm	160	180	180	180	180
Power Supply	V/Hz	230/50	230/50	230/50	230/50	230/50
Energy Efficiency Class	-	A+	A+	A+	A+	A+
5 klasa	-	+	+	+	+	+
Ecodesign	-	+	+	+	+	+

Dimensions:

Type	A	B	C	D	E	F	G	H	I	J	K	L	M	N
Type	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]
HYDRO SILVER 10	1449	1076	680	1252	354	309	127	1291	206	435	388	60	610	460
HYDRO SILVER 15	1449	1247	680	1252	354	342	127	1291	240	519	523	60	655	560
HYDRO SILVER 20	1449	1297	680	1252	354	369	127	1291	266	572	575	60	730	560
HYDRO SILVER 25	1449	1297	713	1252	362	358	127	1291	255	560	673	60	735	560
HYDRO SILVER 40	1676	1447	717	1479	362	432	127	1518	329	710	673	60	885	560