Wall-Hung Boiler Gas, CondensingecoTEC pro VCW

Gas condensing boiler for heating and hot water.

Energy-efficient combi boiler for small and medium homes
Precise heating and instant hot water
Exceptionally quiet operation
Compatible with the full range of Vaillant controls
Bright and user-friendly display
Reduced installation costs

ecoTEC pro provides reliable heating and unlimited instant hot water in one compact appliance. With a seasonal efficiency of 94% and the option to reach 98% with compatible controls, it helps reduce energy use without compromising comfort. The preheating function ensures fast hot water even at low flow rates, while the quiet operation makes it suitable for homes with limited space. The user-friendly display allows easy adjustment, and its compact dimensions simplify replacement with minimal disruption. ecoTEC pro is prepared for up to 20% hydrogen and works with Vaillant connected thermostats, enabling convenient remote control via the myVAILLANT app.

Ideal for:

Heating
Hot water

Technical data table overline

Technical data table headline

ecoTEC pro
VCW BL 236/5-3	VUW INT III 236/5-3 A	VMW 236/5-3 H (H-ES/PT)	VCW BL 286/5-3	VUW INT III 286/5-3

ErP

ErP Seasonal Space Heating Efficiency Class	ErP Seasonal Space Heating Efficiency Class
ErP Water Heating Energy Efficiency Class Of Combination Heater	ErP Water Heating Energy Efficiency Class Of Combination Heater
ErP Seasonal Space Heating Energy Efficiency	ErP Seasonal Space Heating Energy Efficiency	94 %	94 %	94 %	94 %	94 %
ErP Water Heating Energy Efficiency	ErP Water Heating Energy Efficiency	84 %	84 %	84 %	86 %	86 %

ecoTEC pro
VCW BL 236/5-3	VUW INT III 236/5-3 A	VMW 236/5-3 H (H-ES/PT)	VCW BL 286/5-3	VUW INT III 286/5-3

Power Output and Efficiency

Heat Output 50/30 °C (G20) (min - max)	Heat Output 50/30 °C (G20) (min - max)	5,7 - 24,9 kW	5,7 - 24,9 kW	5,7 - 24,9 kW	7,0 - 25,9 kW	7,0 - 25,9 kW
Heat Output 80/60 °C (G20) (min - max)	Heat Output 80/60 °C (G20) (min - max)	5,2 - 23,0 kW	5,2 - 23,0 kW	5,2 - 23 kW	6,2 - 24,0 kW	6,2 - 24,0 kW
Heat Output (G20) (Domestic Hotwater Mode) (max)	Heat Output (G20) (Domestic Hotwater Mode) (max)	23,5 kW	23,5 kW	23 kW	28,6 kW	28,6 kW
Heat Output 50/30 °C (G31) (min - max)	Heat Output 50/30 °C (G31) (min - max)	7,9 - 24,2 kW	7,9 - 24,2 kW	7,9 - 24,2 kW	8,9 - 25,3 kW	8,9 - 25,3 kW
Heat Output 80/60 °C (G31) (min - max)	Heat Output 80/60 °C (G31) (min - max)	7,2 - 23,0 kW	7,2 - 23,0 kW	7,2 - 23 kW	8,2 - 24,0 kW	8,2 - 24,0 kW
Heat Output (G31) (Domestic Hotwater Mode) (max)	Heat Output (G31) (Domestic Hotwater Mode) (max)	23,0 kW	23,0 kW	23 kW	28,6 kW	28,6 kW
Efficiency (G20, G31) (30% acc. to EN 15502)	Efficiency (G20, G31) (30% acc. to EN 15502)	105 %	105 %	109,4 %	107 %	107 %
Efficiency (G20, G31) (Domestic Hotwater Mode)	Efficiency (G20, G31) (Domestic Hotwater Mode)	98 %	98 %	98 %	98 %	98 %
Gas Flow Rate, G20	Gas Flow Rate, G20	2,5 m³/h	2,5 m³/h	2,5 m³/h	3,0 m³/h	3,0 m³/h
Gas Flow Rate, G31	Gas Flow Rate, G31	1,8 kg/h	1,8 kg/h	1,8 kg/h	2,2 kg/h	2,2 kg/h

Domestic Hot Water

Specific Rate D (Δt = 30 K)	Specific Rate D (Δt = 30 K)	11,0 l/min	11,0 l/min	11 l/min	13,4 l/min	13,4 l/min

Electrical Connection

Electrical Power Consumption incl. Pump (Domestic Hotwater Mode) (max)	Electrical Power Consumption incl. Pump (Domestic Hotwater Mode) (max)	80 W	80 W	-	85 W	85 W
Electrical Power Consumption (Heating Mode) (max)	Electrical Power Consumption (Heating Mode) (max)	-	-	64 W	-	-
Electrical Power Consumption incl. Pump (Heating Mode) (max)	Electrical Power Consumption incl. Pump (Heating Mode) (max)	64 W	64 W	-	67 W	67 W
Electrical Power Consumption (Domestic Hotwater Mode) (max)	Electrical Power Consumption (Domestic Hotwater Mode) (max)	-	-	80 W	-	-
Electrical Power Consumption incl. Pump (standby)	Electrical Power Consumption incl. Pump (standby)	﹤ 2 W	﹤ 2 W	-	﹤ 2 W	﹤ 2 W
Electrical Voltage Supply	Electrical Voltage Supply	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)
IP Rating¹	IP Rating¹	IPX4D	IPX4D	IPX4D	IPX4D	IPX4D
Electrical Power Consumption (30 %)	Electrical Power Consumption (30 %)	-	-	35 W	-	-
Electrical Power Consumption (standby)	Electrical Power Consumption (standby)	-	-	﹤ 2 W	-	-

Operation Fluids

Amount Of Condensates at 50/30 °C	Amount Of Condensates at 50/30 °C	1,9 l/h	1,9 l/h	1,9 l/h	2,5 l/h	2,5 l/h

Hydraulics

Pump Volume Flow / Remaining pressure head at ΔT=20 K	Pump Volume Flow / Remaining pressure head at ΔT=20 K	796 l/h / 250 mbar	796 l/h / 250 mbar	796 l/h / 250 mbar	1.032 l/h / 250 mbar	1.032 l/h / 250 mbar
Expansion Vessel Volume	Expansion Vessel Volume	10 l	8 l	10 l	10 l	8 l
Pressure Expansion Vessel	Pressure Expansion Vessel	0,75 bar	0,75 bar	0,75 bar	0,75 bar	0,75 bar

Connections

Connection Dimension Natural Gas	Connection Dimension Natural Gas	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)	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	Ø 60/100 mm	Ø 60/100 mm	Ø 60/100 mm	Ø 60/100 mm	Ø 60/100 mm
Connection Dimension Cold Water, Domestic Hot Water	Connection Dimension Cold Water, Domestic Hot Water	G ¾″	G ¾″	G ¾″	G ¾″	G ¾″

Dimensions

Height / Width / Depth	Height / Width / Depth	720 mm / 440 mm / 338 mm	720 mm / 440 mm / 338 mm	720 mm / 440 mm / 338 mm	720 mm / 440 mm / 338 mm	720 mm / 440 mm / 338 mm
Weight	Weight	33,5 kg	33,5 kg	33,4 kg	33,5 kg	33,5 kg

Limitations

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