DHW CylinderuniSTOR plus 300 - 500l

Large-capacity cylinders ensuring durable hot-water comfort with boilers.

High hot-water comfort for family homes
Perfect combination with gas condensing boilers
Excellent heat retention for lasting warmth
High quality made in Germany — built to last
Different volume sizes available for 4 to 10 people
Easy to read temperature display

Our uniSTOR plus VIH R hot-water cylinders provide high comfort and efficiency when combined with Vaillant gas condensing boilers. With capacities ranging from 300 to 500 litres, they are the ideal solution for single- or two-family homes, ensuring perfect domestic comfort even during simultaneous use. Thanks to B-rated insulation (on a scale from A to F), heat losses remain very low. Made from high-quality materials and protected against corrosion by a replaceable magnesium anode, the uniSTOR plus VIH R stands out for its long-lasting reliability and consistent performance.

Ideal for:

Hot water

Technical data table overline

Technical data table headline

uniSTOR plus
VIH R 300/3 BR	VIH R 400/3 BR	VIH R 500/3 BR

ErP

ErP Energy Efficiency Class Hot Water Storage Tanks	ErP Energy Efficiency Class Hot Water Storage Tanks

uniSTOR plus
VIH R 300/3 BR	VIH R 400/3 BR	VIH R 500/3 BR

Cylinder

Cylinder Nominal Capacity	Cylinder Nominal Capacity	294 l	398 l	490 l

Heat Exchanger

Heat Exchanger Heating (Heating Area / Heat Exchanger Content)	Heat Exchanger Heating (Heating Area / Heat Exchanger Content)	1,5 m² / 9,9 l	1,7 m² / 10,9 l	2,3 m² / 15,2 l

Domestic Hot Water

Initial Domestic Hot Water Output (flow = 45 °C) (Tcyl = 60 °C)	Initial Domestic Hot Water Output (flow = 45 °C) (Tcyl = 60 °C)	396 l/10min	517 l/10min	623 l/10min
Continuous Domestic Hot Water Output (flow = 45 °C) (Tcyl = 60 °C) / Heat Output	Continuous Domestic Hot Water Output (flow = 45 °C) (Tcyl = 60 °C) / Heat Output	611 l/h / 24,8 kW	668 l/h / 27,1 kW	936 l/h / 38,0 kW
NL-Figure (Tcyl = 60 °C)	NL-Figure (Tcyl = 60 °C)	9,0	15,0	21,0

Insulation And Heat Loss

Standby Heat Loss	Standby Heat Loss	1,40 kWh/24h	1,52 kWh/24h	1,78 kWh/24h

Connections

Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	R 1″	R 1″	R 1″
Connection Dimension Circulation	Connection Dimension Circulation	R ¾″	R ¾″	R ¾″
Connection Dimension Cold Water, Domestic Hot Water	Connection Dimension Cold Water, Domestic Hot Water	R 1″	R 1″	R 1″

Dimensions

Height / Width / Depth	Height / Width / Depth	1.804 mm / 650 mm / 755 mm	1.502 mm / 790 mm / 900 mm	1.802 mm / 790 mm / 900 mm
Weight	Weight	103 kg	136 kg	170 kg
Weight Ready for Operation	Weight Ready for Operation	397 kg	535 kg	661 kg
Tilt Dimension	Tilt Dimension	1.903 mm	1.684 mm	1.954 mm

Limitations

Temperature Domestic Hot Water (max)	Temperature Domestic Hot Water (max)	85 °C	85 °C	85 °C
Temperature Heating (max)	Temperature Heating (max)	110 °C	110 °C	110 °C
Operating Pressure Domestic Hot Water (max)	Operating Pressure Domestic Hot Water (max)	10 bar	10 bar	10 bar
Operating Pressure Heating (max)	Operating Pressure Heating (max)	10 bar	10 bar	10 bar