Vaillant ecoTEC pro condensing combi boiler

ecoTEC pro is the condensing combi range that balances purchase price against performance. It suits standard two and three bedroom flats whose owners want a long-lived appliance that is easy to service.

Capacity: 20–35 kW
Energy class: A

Aqua Comfort and Aqua Sensor technology hold the outlet temperature even when only 1.5 L/min is drawn, so the shower does not turn cold halfway through. Automatic output matching lets the boiler throttle to whatever the home actually needs at that moment.

Spare parts and service coverage are widespread, which keeps the long-term running cost predictable. For every ecoTEC pro we install, we register the warranty ourselves as an authorised dealer.

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Technical data

Figures come from the manufacturer’s official product page and technical documents; they can vary by model and output.

Vaillant ecoTEC pro – technical data table
Property	Detail
Capacity	20–35 kW
Heating output	20–35 kW
Hot water output	26–40 kW
Min. operating flow	1.5 L/min
Seasonal heating efficiency	ηs 93–94% (class A)
Hot water load profile	XL
Water heating efficiency	84–86% (VUW TR 236/286)
NOx emissions	27–35 mg/kWh (VUW TR 236/286)
Sound power level	49 dB(A), indoor
Energy class	A

Source: Vaillant official product page, product information sheet (ErP) and installation/maintenance manuals. Values with a stated measuring condition apply under the test conditions of that standard.

What Devka Doğalgaz does for this product

We do not just sell the appliance; our own team handles every step from selection to the annual service.

Choosing the right output

We size the appliance to your floor area, household size and hot water demand during a free survey.
Sale and installation

We invoice the appliance as an authorised dealer and carry out the pipework and flue to standard.
Commissioning

We do the first start-up, register the warranty and show you how to use the appliance on site.
Authorised service

We remind you when the annual service is due and give priority appointments across Antalya.

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Vaillant’s premium condensing combi range, with 20–35 kW heating and 26–40 kW hot water output for larger flats. IoniDetect combustion technology adapts automatically to changes in gas quality. Paired with a compatible room control and outdoor sensor it reaches A+ seasonal system efficiency.
Vaillant ecoTEC plus VUI combi boiler with built-in cylinder
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An ecoTEC plus with a hot water cylinder inside the casing, so no separate cylinder is needed. It delivers up to 220 litres of hot water in ten minutes, which suits flats with two bathrooms and heavy use. The stainless steel heat exchanger gives a long service life.
Vaillant ecoTEC pure condensing combi boiler
- 20–35 kW
A condensing combi with A rated efficiency in both heating and hot water, delivering XL profile hot water performance. Aqua Sensor technology maintains comfort even at low flow rates. A well balanced choice for standard flats.