Vaillant ecoTEC Plus 835 Combi Boiler 35kW (0010021822) – High Efficiency Heating Solution
Free Local Shipping
Free Local Shipping on orders over £100. Standard delivery to most UK postcodes within 2-3 working days. Express options available at checkout.
Contact Us
Give Us A Call +44 118 958 8882 Our team is here to help. We will provide expert advice on specifications, compatibility, and delivery options.
30-day Easy Return
30 days Easy Return — no questions asked. If you're not completely satisfied, send it back within 14 days for a full refund.
Vaillant ecoTEC plus 835 35kW Combi Boiler (Model 0010021822) is a high-performance, wall-mounted combination boiler designed to provide reliable central heating and domestic hot water for medium to large-sized homes. With a 35kW domestic hot water output, advanced modulation and an ErP A-rated efficiency, it delivers strong performance while helping to improve energy efficiency and household comfort.
35kW
ErP A-Rated
14.3 L/min
0010021822
The 35kW output provides reliable domestic hot water performance and a 31kW central heating output for medium to large-sized homes.
With an ErP A rating and 94% efficiency, the boiler is designed to deliver effective heating performance while helping to manage energy consumption.
The wall-mounted design measures 720mm high, 440mm wide and 372mm deep, allowing flexible installation including cupboard-fit applications.
Quiet Mark accredited and compatible with Vaillant vSMART controls for convenient heating and hot water management.
Specifications
| Brand | Vaillant |
| Model | ecoTEC plus 835 |
| Product code | 0010021822 |
| Boiler type | Combination boiler |
| Domestic hot water output | 35kW |
| Central heating output | 31kW |
| Hot water flow rate | Up to 14.3 L/min |
| Efficiency | 94% |
| ErP rating | A |
| Dimensions | 720mm (H) x 440mm (W) x 372mm (D) |
| NOx class | Class 6 |
| Warranty | 5 years standard |
Installation & maintenance
The Vaillant ecoTEC plus 835 should be installed by a suitably qualified Gas Safe registered engineer. Its push-button controls and backlit display provide straightforward operation, while regular servicing by a qualified professional is recommended to maintain safe, efficient and reliable performance throughout the boiler's working life.
Related & next steps
For extended warranty options, installation requirements and compatible controls, check the latest manufacturer specifications before purchase. The ecoTEC plus 835 is particularly suited to medium and large homes where strong central heating performance, high domestic hot water demand and compact installation are important considerations.
