Hydraulic Tower for Air-to-Water Heat PumpuniTOWER

Compact heat pump indoor unit for easy installation even in smaller spaces.

Flexible system design with easy installation, even in challenging spaces
Reliable hot water comfort with fast availability when needed
All-in-one compact design that blends seamlessly even in kitchen cabinets
Manage your heating wherever you are with the myVaillant app

The uniTOWER delivers strong hot water performance in a compact footprint, roughly the size of a large fridge. All essential components are integrated into one unit, saving space and fitting naturally into modern living areas. The 190-litre cylinder provides reliable hot water for everyday use, with enough capacity for longer showers and high flow rates. The Split Mounting Concept makes installation easier, even in narrow staircases and tight spaces. Optional smart control via the myVaillant app adds convenient control for everyday comfort.

Ideal for:

Heating
Hot water
Cooling

Technical data table overline

Technical data table headline

uniTOWER
VWL 58/5 IS	VWL 78/5 IS	VWL 128/5 IS

ErP

ErP Seasonal Space Heating Energy Efficiency Medium Temp (average)	ErP Seasonal Space Heating Energy Efficiency Medium Temp (average)	-	-	128 %

uniTOWER
VWL 58/5 IS	VWL 78/5 IS	VWL 128/5 IS

Hydraulics

Expansion Vessel Volume	Expansion Vessel Volume	15 l	15 l	15 l
Pressure Expansion Vessel	Pressure Expansion Vessel	0,75 bar	0,75 bar	0,75 bar

uniTOWER
VWL 58/5 IS	VWL 78/5 IS	VWL 128/5 IS

Cylinder

Cylinder Nominal Capacity	Cylinder Nominal Capacity	188 l	188 l	188 l

Electrical Connection

Electrical Voltage Supply	Electrical Voltage Supply	400 V (50 Hz)	400 V (50 Hz)	400 V (50 Hz)
IP Rating¹	IP Rating¹	IP10B	IP10B	IP10B

Connections

Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	G 1″	G 1″	G 1″
Connection Dimension Cold Water, Domestic Hot Water, Circulation	Connection Dimension Cold Water, Domestic Hot Water, Circulation	G ¾″	G ¾″	G ¾″
Connection Dimension Refrigerant Liquid Pipe	Connection Dimension Refrigerant Liquid Pipe	¼″	⅜″	⅜″
Connection Dimension Refrigerant Suction Pipe	Connection Dimension Refrigerant Suction Pipe	½″	⅝″	⅝″

Dimensions

Height / Width / Depth	Height / Width / Depth	1.880 mm / 595 mm / 693 mm	1.880 mm / 595 mm / 693 mm	1.880 mm / 595 mm / 693 mm
Weight (Unpackaged, Net)	Weight (Unpackaged, Net)	158 kg	159 kg	160 kg
Weight Ready for Operation	Weight Ready for Operation	365 kg	367 kg	369 kg

Limitations

Operating Pressure Domestic Hot Water (max)	Operating Pressure Domestic Hot Water (max)	10 bar	10 bar	10 bar
Flow Temperature (Heating Mode) (min - max)	Flow Temperature (Heating Mode) (min - max)	20 - 55 °C	20 - 55 °C	20 - 55 °C
Flow Temperature (With Back-Up Heater) (Heating Mode) (max)	Flow Temperature (With Back-Up Heater) (Heating Mode) (max)	75 °C	75 °C	75 °C
Flow Temperature (Cooling Mode) (min - max)	Flow Temperature (Cooling Mode) (min - max)	7 - 25 °C	7 - 25 °C	7 - 25 °C

¹EN 60529