Vaillant ecoTEC Plus 620 20kW System Gas Boiler – 0010036011
Vaillant ecoTEC Plus 620 20kW System Gas Boiler – 0010036011
Vaillant ecoTEC Plus 620 20kW System Gas Boiler – 0010036011
The Vaillant ecoTEC Plus 620 is a premium 20kW system boiler designed to deliver efficient, dependable central heating in homes with a separate hot-water cylinder.
Its intelligent ioniDETECT technology continuously monitors gas combustion, helping the boiler maintain efficient and reliable performance. A wide modulation range allows the boiler to reduce its output when heating demand is lower, supporting improved efficiency and more consistent indoor temperatures.
The ecoTEC Plus 620 is smart-home ready and can be paired with compatible Vaillant controls and the myVAILLANT connect internet gateway for convenient app-based heating control.
A familiar footprint and refined internal layout make the boiler straightforward to install and service, while its quiet 35dB(A) operation makes it suitable for installation in or close to living areas.
Key Features
- 20kW natural-gas system boiler
- Designed for use with a separate hot-water cylinder
- A-rated for central-heating efficiency
- 93% ErP seasonal heating efficiency
- Intelligent ioniDETECT combustion technology
- Up to 1:9 modulation ratio
- Smart-home ready
- Compatible with selected Vaillant controls
- Intuitive semi-touch control interface
- Stainless-steel heat exchanger
- Quiet 35dB(A) operation
- 20% hydrogen blend ready
- Compact, installer-friendly design
- Five-year manufacturer’s guarantee*
- Boiler only – flue and controls sold separately
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Vaillant |
| Range | ecoTEC Plus |
| Model | 620 |
| Boiler type | System boiler |
| Fuel type | Natural gas |
| Rated output | 20kW |
| Condensing output range | 2.8–21.2kW |
| Non-condensing output range | 2.5–19.8kW |
| Heating efficiency | 93% |
| ErP heating rating | A |
| Modulation ratio | Up to 1:9 |
| Sound level | 35dB(A) |
| Heat exchanger | Stainless steel |
| Dimensions | 720 × 440 × 352mm |
| Dry weight | 34kg |
| Gas connection | 15mm |
| Heating flow and return | 22mm |
| Maximum 60/100 horizontal flue | 16 metres |
| Maximum 60/100 vertical flue | 12 metres |
| Manufacturer part number | 0010036011 |
| EAN | 4024074906613 |
| Guarantee | 5 years* |
What’s Included?
- Vaillant ecoTEC Plus 620 20kW system boiler
- Standard manufacturer-supplied components
- Installation and user documentation
Please note: This is a boiler-only listing. The flue, magnetic filter, heating controls, hot-water cylinder and installation materials are not included unless expressly stated.
Installation Notice
This natural-gas boiler must be installed and commissioned by a suitably qualified Gas Safe registered engineer. The required boiler output should be confirmed by the installer before purchase.
*Manufacturer’s guarantee is subject to Vaillant’s installation, registration and annual servicing requirements.
Delivery is 6-11 Working Days
Product Details
Product Details
Materials and care
Materials and care
Merchandising tips
Merchandising tips
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