Wall-Hung Boiler Gas, CondensingecoTEC plus VU <35 kW

Efficient heating you can rely on.

A flexible solution for all requirements
Smart technology for reduced consumption
Perfectly matched with Vaillant cylinders
Convenient operation via the myVAILLANT App
Fast installation and easy servicing
All components from a single manufacturer

The Vaillant ecoTEC plus VU is a highly efficient condensing boiler with heating efficiencies of up to 94 %, designed to deliver reliable comfort while keeping energy costs low. Available in different power outputs, it is suitable for everything from small apartments to large family homes. Thanks to its intelligent modulation, the boiler adjusts its output to actual demand, helping to optimise energy consumption without sacrificing comfort. When combined with a Vaillant hot water cylinder, you benefit from consistent hot water availability — even when several taps are used at the same time. With compatible Vaillant thermostats, heating settings can be conveniently controlled and adjusted remotely.

Ideal for:

Heating

Technical data table overline

Technical data table headline

ecoTEC plus
VU 122/5-5 (H-VE-RU)	VU 156/5-5 (H)	VU 186/5-5 (H)	VU 202/5-5 (H-VE-RU)	VU 240/5-5 (H-VE-RU)	VU 246/5-5 (H)	VU 280/5-5 (H-VE-RU)	VC 306/5-5 (E)	VC 356/5-5 (E)	VU 386/5-5 (H)

ErP

ErP Seasonal Space Heating Efficiency Class	ErP Seasonal Space Heating Efficiency Class	-			-	-		-
ErP Seasonal Space Heating Energy Efficiency	ErP Seasonal Space Heating Energy Efficiency	-	93 %	94 %	-	-	94 %	-	94 %	94 %	94 %

ecoTEC plus
VU 122/5-5 (H-VE-RU)	VU 156/5-5 (H)	VU 186/5-5 (H)	VU 202/5-5 (H-VE-RU)	VU 240/5-5 (H-VE-RU)	VU 246/5-5 (H)	VU 280/5-5 (H-VE-RU)	VC 306/5-5 (E)	VC 356/5-5 (E)	VU 386/5-5 (H)

Power Output and Efficiency

Heat Output 50/30 °C (❕-SELECT-VALUE) (min - max)	Heat Output 50/30 °C (❕-SELECT-VALUE) (min - max)	999.999 - 999.999 kW	-	-	-	-	-	-	-	-	-
Heat Output 80/60 °C (❕-SELECT-VALUE) (min - max)	Heat Output 80/60 °C (❕-SELECT-VALUE) (min - max)	999.999 - 999.999 kW	-	-	-	-	-	-	-	-	-
Efficiency (❕-SELECT-VALUE) (30% acc. to EN 15502)	Efficiency (❕-SELECT-VALUE) (30% acc. to EN 15502)	999.999 %	-	-	-	-	-	-	-	-	-
Heat Output (❕-SELECT-VALUE) (Domestic Hotwater Mode) (max)	Heat Output (❕-SELECT-VALUE) (Domestic Hotwater Mode) (max)	999.999 kW	-	-	-	-	-	-	-	-	-
Efficiency (❕-SELECT-VALUE) (Domestic Hotwater Mode)	Efficiency (❕-SELECT-VALUE) (Domestic Hotwater Mode)	999.999 %	-	-	-	-	-	-	-	-	-
Gas Flow Rate, ❕-SELECT-VALUE	Gas Flow Rate, ❕-SELECT-VALUE	999.999 m³/h	-	-	-	-	-	-	-	-	-
Gas Flow Rate, G20	Gas Flow Rate, G20	-	1,6 m³/h	2 m³/h	-	-	2,6 m³/h	-	3,3 m³/h	4,1 m³/h	4 m³/h
Heat Output 50/30 °C (G20) (min - max)	Heat Output 50/30 °C (G20) (min - max)	-	3,3 - 16,1 kW	4,2 - 19,3 kW	-	-	5,7 - 25,7 kW	-	6,4 - 32,6 kW	7,1 - 38,0 kW	7,1 - 39,6 kW
Heat Output 50/30 °C (G31) (min - max)	Heat Output 50/30 °C (G31) (min - max)	-	4,1 - 16,1 kW	5 - 19,3 kW	-	-	6 - 25,7 kW	-	-	-	8,5 - 39,6 kW
Heat Output 50/30 °C (G25) (min - max)	Heat Output 50/30 °C (G25) (min - max)	-	-	-	-	-	-	-	5,3 - 26,1 kW	5,8 - 31,2 kW	-
Heat Output 80/60 °C (G20) (min - max)	Heat Output 80/60 °C (G20) (min - max)	-	3 - 15,4 kW	3,8 - 18,5 kW	-	-	5,2 - 24,4 kW	-	6,1 - 30,0 kW	6,4 - 35,0 kW	6,4 - 37,6 kW
Heat Output 80/60 °C (G31) (min - max)	Heat Output 80/60 °C (G31) (min - max)	-	4,1 - 15,4 kW	5 - 18,5 kW	-	-	6 - 24,4 kW	-	-	-	8,5 - 37,6 kW
Heat Output 80/60 °C (G25) (min - max)	Heat Output 80/60 °C (G25) (min - max)	-	-	-	-	-	-	-	4,8 - 26,4 kW	5,3 - 28,7 kW	-
Efficiency (G20, G31) (30% acc. to EN 15502)	Efficiency (G20, G31) (30% acc. to EN 15502)	-	109 %	109 %	-	-	109 %	-	-	-	109 %
Efficiency (G20, G25) (30% acc. to EN 15502)	Efficiency (G20, G25) (30% acc. to EN 15502)	-	-	-	-	-	-	-	109 %	109,4 %	-
Heat Output (G20, G31) (Domestic Hotwater Mode) (max)	Heat Output (G20, G31) (Domestic Hotwater Mode) (max)	-	15,4 kW	18,5 kW	-	-	24,4 kW	-	-	-	37,6 kW
Heat Output (G20) (Domestic Hotwater Mode) (max)	Heat Output (G20) (Domestic Hotwater Mode) (max)	-	-	-	-	-	-	-	34,0 kW	38,0 kW	-
Efficiency (G20, G25, G31) (Domestic Hotwater Mode)	Efficiency (G20, G25, G31) (Domestic Hotwater Mode)	-	98 %	98 %	-	-	98 %	-	-	-	98 %
Heat Output (G25) (Domestic Hotwater Mode) (max)	Heat Output (G25) (Domestic Hotwater Mode) (max)	-	-	-	-	-	-	-	27,9 kW	31,2 kW	-
Gas Flow Rate, G31	Gas Flow Rate, G31	-	1,2 kg/h	1,44 kg/h	-	-	1,92 kg/h	-	-	-	2,96 kg/h
Efficiency (G20, G25) (Domestic Hotwater Mode)	Efficiency (G20, G25) (Domestic Hotwater Mode)	-	-	-	-	-	-	-	98 %	98 %	-

Electrical Connection

Electrical Power Consumption incl. Pump (max)	Electrical Power Consumption incl. Pump (max)	999.999 W	95 W	100 W	-	-	100 W	-	110 W	115 W	130 W
Electrical Power Consumption incl. Pump (standby)	Electrical Power Consumption incl. Pump (standby)	999.999 W	﹤ 2 W	﹤ 2 W	-	-	﹤ 2 W	-	﹤ 2 W	﹤ 3,3 W	﹤ 3,3 W
Electrical Voltage Supply	Electrical Voltage Supply	❕-SELECT-VALUE	230 V (50 Hz)	230 V (50 Hz)	-	-	230 V (50 Hz)	-	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)
IP Rating¹	IP Rating¹	❕-SELECT-VALUE	IPX4D	IPX4D	-	-	IPX4D	-	IPX4D	IPX4D	IPX4D
Electrical Power Consumption incl. Pump (30 %)	Electrical Power Consumption incl. Pump (30 %)	-	40 W	45 W	-	-	50 W	-	50 W	50 W	50 W

Operation Fluids

Content Heating Circuit	Content Heating Circuit	999.999 l	-	-	-	-	-	-	-	-	-
Amount Of Condensates at 50/30 °C	Amount Of Condensates at 50/30 °C	999.999 l/h	1,6 l/h	1,9 l/h	-	-	2,5 l/h	-	3,1 l/h	3,6 l/h	3,8 l/h

Hydraulics

Pump Volume Flow / Remaining pressure head at ΔT=20 K	Pump Volume Flow / Remaining pressure head at ΔT=20 K	999.999 l/h / 999.999 mbar	645 l/h / 250 mbar	774 l/h / 250 mbar	-	-	1.032 l/h / 200 mbar	-	1.290 l/h / 200 mbar	1.505 l/h / 250 mbar	1.591 l/h / 200 mbar
Expansion Vessel Volume	Expansion Vessel Volume	10 l	10 l	10 l	-	-	10 l	-	10 l	10 l	10 l
Pressure Expansion Vessel	Pressure Expansion Vessel	0,75 bar	0,75 bar	0,75 bar	-	-	0,75 bar	-	0,75 bar	0,75 bar	0,75 bar

Connections

Connection Dimension Natural Gas	Connection Dimension Natural Gas	❕-SELECT-DIMENSION	Ø 15 mm	Ø 15 mm	-	-	Ø 15 mm	-	Ø 15 mm	Ø 15 mm	Ø 15 mm
Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	❕-SELECT-DIMENSION	Ø 22 mm	Ø 22 mm	-	-	Ø 22 mm	-	Ø 22 mm	Ø 22 mm	Ø 22 mm
Connection Dimension Combustion Air, Flue Gas	Connection Dimension Combustion Air, Flue Gas	❕-SELECT-DIMENSION	Ø 60/100 mm	Ø 60/100 mm	-	-	Ø 60/100 mm	-	Ø 60/100 mm	Ø 80/125 mm	Ø 60/100 mm
Connection Dimension Cylinder	Connection Dimension Cylinder	❕-SELECT-DIMENSION	G ½″	G ½″	-	-	G ½″	-	G ¾″	G ¾″	G ½″

Dimensions

Height / Width / Depth	Height / Width / Depth	999.999 mm / 999.999 mm / 999.999 mm	720 mm / 440 mm / 338 mm	720 mm / 440 mm / 338 mm	-	-	720 mm / 440 mm / 338 mm	-	720 mm / 440 mm / 372 mm	720 mm / 440 mm / 406 mm	720 mm / 440 mm / 406 mm
Weight	Weight	999.999 kg	35 kg	35 kg	-	-	37 kg	-	39 kg	41 kg	41 kg

Limitations

Flow Temperature (max)	Flow Temperature (max)	999.999 °C	85 °C	85 °C	-	-	85 °C	-	85 °C	85 °C	85 °C
Operating Pressure Heating (max)	Operating Pressure Heating (max)	999.999 bar	3 bar	3 bar	-	-	3 bar	-	3 bar	3 bar	3 bar

Conformity-IDs

Gas Category	Gas Category	999.999	II2H3P	II2H3P	-	-	II2H3P	-	II2H3P	I2E(S)	II2H3P
CE PIN	CE PIN	999.999	CE-0085CM0320	CE-0085CM0320	-	-	CE-0085CM0320	-	CE-0085CM0320	CE-0085CM0321	CE-0085CM0320