Vaillant ecoTEC Plus 826 Gas Combi Boiler | 0010036015 | 26kW IoniDETECT

Description

The Vaillant ecoTEC Plus 826 (MPN 0010036015) is a 26kW gas combi boiler from Vaillant's current-generation ecoTEC plus range, built around IoniDETECT combustion monitoring technology for a wider, more precise modulation range. It retains the familiar footprint, flue position and pipe connections of previous ecoTEC plus generations, making it a straightforward like-for-like swap for installers.

A semi-touch interface with a guided commissioning wizard simplifies first-time setup, while automatic LPG conversion can be completed in minutes at commissioning with no extra parts required. The boiler is hydrogen-prepared for up to a 20% blend and smart-home ready via Vaillant's myVAILLANT connect gateway for app control and remote diagnostics.

93%

ErP Efficiency

10.6 L/min

DHW Flow Rate (Δ35K)

1:10

Modulation Ratio

7 Yrs

Warranty (Advance)

36kg

Boiler Lift Weight

46 dB(A)

Sound Power

Gas Safe installation required. This is a mains gas appliance and must be installed, commissioned and serviced by a Gas Safe registered engineer, in line with Building Regulations Part L and current Gas Safety (Installation and Use) Regulations.

IoniDETECT Technology

Intelligent gas combustion monitoring helps the boiler reach a wider modulation range of up to 1:10, improving overall system efficiency.

Smart Home Ready

Pairs with the myVAILLANT connect internet gateway for app control, smart home integration and remote appliance support in minutes.

Automatic LPG Conversion

Conversion to LPG is completed in minutes via the interface during commissioning, with no additional parts required.

Hydrogen Prepared

Tested and validated to operate safely with up to a 20% hydrogen gas blend, future-proofing the installation against changes to the gas grid.

Guided Commissioning Wizard

A semi-touch interface with a step-by-step commissioning wizard simplifies first-time installation and setup for engineers.

Like-for-Like Replacement

Retains the same case dimensions, flue position and pipe connections as previous ecoTEC plus generations for a straightforward swap.

Heating Performance

Nominal Heat Output (50/30°C, condensing)

2.5–19.8 kW

Modulation Ratio

Up to 1:10

Domestic Hot Water

DHW Flow Rate (Δ30K)

12.4 L/min

DHW Flow Rate (Δ35K)

10.6 L/min

Hot Water Output Temperature Range

35–65°C

Lowest Water Pressure to Operate

0.7 bar

Lowest Water Flow for Operation

2.0 L/min

Physical & Connections

Dimensions (H × W × D)

720 × 440 × 352 mm

Boiler Lift Weight (dry)

36 kg

Gas Inlet Connection

15mm

Heating Flow & Return Connections

22mm

Hot & Cold Water Connections

15mm

Heat Exchanger Material

Stainless steel

Filling Loop Supplied

Yes

Emissions & Noise

NOx Emissions (EN 15502-2-1)

33 mg/kWh

ErP Efficiency (Heating / DHW)

A / A (93%)

ErP Sound Power

46 dB(A)

Flueing Options

Max Horizontal / Vertical Flue (60/100)

10 m / 10 m

Max Horizontal / Vertical Flue (80/125)

28 m / 30 m

Compliance & Coverage

Manufacturer Part Number (MPN)

0010036015

GTIN / EAN

4024074906729

Warranty

Standard warranty; up to 7 years with Vaillant Advance registration and boiler protection kit

What is IoniDETECT technology?

IoniDETECT is Vaillant's intelligent gas combustion monitoring system, continuously measuring and adapting to the gas supply to help the boiler reach a wider modulation range and run more efficiently across varying demand.

Can this boiler be converted to run on LPG?

Yes. The ecoTEC plus 826 supports automatic LPG conversion, completed in minutes via the interface at commissioning stage with no additional parts required, thanks to IoniDETECT technology continuously adapting to the gas type.

How do I get the full 7-year warranty?

The standard warranty applies out of the box. To extend this to up to 7 years, the boiler typically needs to be registered with Vaillant Advance and fitted with a compatible boiler protection kit — confirm current eligibility and steps with Vaillant before completing the installation.

Does this boiler support smart heating controls?

Yes. It's compatible with myVAILLANT connect, Vaillant's plug-and-play internet gateway, enabling app control, smart home integration and remote appliance support in minutes.

Who can install this boiler?

Installation, commissioning and servicing must be carried out by a Gas Safe registered engineer, in line with UK Gas Safety (Installation and Use) Regulations and Building Regulations Part L.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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