Wall-Hung Boiler Gas, Non-Condensing CombiatmoTEC plus VCW

Swift non-condensing boiler replacement with built-in hot water preparation.

Compact design for efficient boiler replacement, requiring only 0.32 m² of wall space
Effortless hot water supply with up to 11.5 l/min
Engineered for durability with a stainless steel heat exchanger
Intuitive operation with backlit display
Ready for the future with green gases

Perfect for quick and compact 1:1 boiler replacement in multi-family house apartments: the atmoTEC plus VCW gas combi boiler. Combining heating and hot water generation in a remarkably space-saving design, this non-condensing unit offers an efficient solution for modernisation. Engineered with technical optimisations, it complies with the Ecodesign Directive (ErP), making it suitable for use in multi-family homes. With the flexibility to operate on up to 100% bio-natural gas, the atmoTEC plus VCW effortlessly meets legal requirements for renewable energy integration. Available in 20 and 24 kW outputs, it delivers reliable performance tailored to your needs. Built with proven components and robust materials, this boiler ensures durability and dependable operation for years to come — a safe investment in efficiency and peace of mind.

Ideal for:

Heating
Hot water

Technical data table overline

Technical data table headline

atmoTEC plus
VUW 194/4-5 (H-VGI)	VUW 200/5-5 (H)	VUW 240/5-5 (H)	VUW 280/5-5 (H-VE-AR)

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	78 %	-	-	-
ErP Water Heating Energy Efficiency	ErP Water Heating Energy Efficiency	62 %	-	-	-

atmoTEC plus
VUW 194/4-5 (H-VGI)	VUW 200/5-5 (H)	VUW 240/5-5 (H)	VUW 280/5-5 (H-VE-AR)

Power Output and Efficiency

Heat Output 80/60 °C (G20) (min - max)	Heat Output 80/60 °C (G20) (min - max)	8 - 20 kW	7,6 - 19,7 kW	9,1 - 24,0 kW	10,7 - 28,0 kW
Heat Output (G20) (Domestic Hotwater Mode) (max)	Heat Output (G20) (Domestic Hotwater Mode) (max)	20 kW	19,7 kW	24,0 kW	28,0 kW
Efficiency (G20) (Domestic Hotwater Mode)	Efficiency (G20) (Domestic Hotwater Mode)	90 %	-	-	-
Efficiency (G20) (acc. to EN 15502) (30 %)	Efficiency (G20) (acc. to EN 15502) (30 %)	89 %	-	-	-
Gas Flow Rate, G20	Gas Flow Rate, G20	2,35 m³/h	2,4 m³/h	2,8 m³/h	3,3 m³/h
Heat Output 80/60 °C (G31) (min - max)	Heat Output 80/60 °C (G31) (min - max)	-	7,6 - 17 kW	9,1 - 24,0 kW	10,7 - 28,0 kW
Gas Flow Rate, G31	Gas Flow Rate, G31	-	1,57 kg/h	1,91 kg/h	2,08 kg/h

Combustion

Flue Gas Mass Flow Rate (min)	Flue Gas Mass Flow Rate (min)	11 g/s	-	-	-
Flue Gas Mass Flow Rate (G20) (min)	Flue Gas Mass Flow Rate (G20) (min)	-	13,8 g/s	20,96 g/s	22,85 g/s
Flue Gas Mass Flow Rate (nominal)	Flue Gas Mass Flow Rate (nominal)	13 g/s	-	-	-
Flue Gas Mass Flow Rate (G31) (min)	Flue Gas Mass Flow Rate (G31) (min)	-	13 g/s	22,03 g/s	22,38 g/s
Flue Gas Temperature at 80/60 °C (min - max)	Flue Gas Temperature at 80/60 °C (min - max)	90 - 150 °C	90 - 115 °C	80 - 109 °C	85 - 113 °C
CO₂ Content G20 (min - max)	CO₂ Content G20 (min - max)	3,1 - 7,6 %	-	-	-
CO₂ Content G20 (min)	CO₂ Content G20 (min)	-	2,3 %	-	2,22 %

Domestic Hot Water

Continuous Domestic Hot Water Output (Δt = 30 K)	Continuous Domestic Hot Water Output (Δt = 30 K)	9,6 l/min	9,5 l/min	11,5 l/min	13,4 l/min
Continuous Domestic Hot Water Output (Δt = 45 K)	Continuous Domestic Hot Water Output (Δt = 45 K)	6,4 l/min	-	-	-

Electrical Connection

Electrical Power Consumption incl. Pump (Domestic Hotwater Mode) (max)	Electrical Power Consumption incl. Pump (Domestic Hotwater Mode) (max)	50 W	108 W	93 W	93 W
Electrical Voltage Supply	Electrical Voltage Supply	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)	230 V (50 Hz)

Hydraulics

Pump Volume Flow / Remaining pressure head at ΔT=20 K	Pump Volume Flow / Remaining pressure head at ΔT=20 K	860 l/h / 250 mbar	878,2 l/h / 240 mbar	1.032 l/h / 220 mbar	1.206 l/h / 340 mbar
Expansion Vessel Volume	Expansion Vessel Volume	12 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

Connections

Connection Dimension Heating (Flow, Return)	Connection Dimension Heating (Flow, Return)	Ø 22 mm	G ¾″	G ¾″	G ¾″
Connection Dimension Cold Water, Domestic Hot Water	Connection Dimension Cold Water, Domestic Hot Water	Ø 15 mm	G ¾″	G ¾″	G ¾″
Connection Dimension Natural Gas	Connection Dimension Natural Gas	Ø 20 mm	G ½″	G ½″	G ½″
Connection Dimension Flue Gas	Connection Dimension Flue Gas	Ø 110 mm	-	Ø 130 mm	Ø 130 mm

Dimensions

Height / Width / Depth	Height / Width / Depth	800 mm / 440 mm / 338 mm	800 mm / 440 mm / 338 mm	800 mm / 440 mm / 338 mm	800 mm / 440 mm / 338 mm
Weight	Weight	44 kg	36 kg	36 kg	37 kg

Limitations

Temperature Domestic Hot Water (min - max)	Temperature Domestic Hot Water (min - max)	30 - 65 °C	35 - 65 °C	35 - 65 °C	35 - 65 °C
Operating Pressure Heating (max)	Operating Pressure Heating (max)	3 bar	3 bar	3 bar	3 bar
Operating Pressure Domestic Hot Water (max)	Operating Pressure Domestic Hot Water (max)	10 bar	10 bar	10 bar	10 bar

CE PIN	CE PIN	CE-0085BS0340	-	-	-
Gas Category	Gas Category	-	II2H3B/P	II2H3B/P	II2H3B/P