Vaillant ecoTEC Plus 615 Gas System Boiler | 0010036010 | 15kW IoniDETECT

Description

The Vaillant ecoTEC Plus 615 (MPN 0010036010) is a 15kW gas system boiler, designed to work with a sealed heating system and a separate unvented or vented hot water cylinder. It's a good fit for smaller properties that need the pressurised, no-loft-tank benefits of a system boiler without the higher output of the 625 or 635 variants.

Built around Vaillant's IoniDETECT combustion monitoring technology, the 615 reaches a modulation range of up to 1:8 for closer matching to system demand. A stainless steel heat exchanger, semi-touch interface with guided commissioning, and readiness for up to a 20% hydrogen gas blend round out a boiler built for straightforward installation and long service life.

93%

ErP Efficiency

19.6kW

Max Water Generation

1:8

Modulation Ratio

34kg

Boiler Lift Weight

42 dB(A)

Sound Power

16m

Max Horizontal Flue

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.

Cylinder required: This is a system boiler — it must be installed with a separate hot water cylinder (typically an unvented cylinder for mains pressure hot water). It does not provide hot water on its own.

IoniDETECT Technology

Intelligent gas combustion monitoring helps the boiler reach a modulation range of up to 1:8 for closer matching to system demand.

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, footprint and pipe connections as previous ecoTEC plus generations for a straightforward swap.

Heating Performance

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

2.8–15.9 kW

Nominal Heat Output (80/60°C, non-condensing)

2.5–14.8 kW

Modulation Ratio

1:8

Flow Temperature Range

30–85°C (factory setting 75°C)

Water Generation

Maximum Heat Output for Water Generation

19.6 kW

Physical & Connections

Dimensions (H × W × D)

720 × 440 × 352 mm

Boiler Lift Weight (dry)

34 kg

Gas Inlet Connection

15mm

Heating Flow & Return Connections

22mm

Heat Exchanger Material

Stainless steel

Emissions & Noise

NOx Emissions (EN 15502-2-1)

36.0 mg/kWh

ErP Efficiency

93% (Heating: A)

ErP Sound Power

42 dB(A)

Flueing & Clearances

Max Horizontal / Vertical Flue (60/100)

16 m / 12 m

Max Horizontal / Vertical Flue (80/125)

28 m / 30 m

Front Clearance

500mm (can reduce to 5mm behind removable panel)

Top / Bottom Clearance

165mm / 180mm

Compliance & Coverage

Manufacturer Part Number (MPN)

0010036010

Warranty

Standard warranty; extended terms available with Vaillant Advance registration

What's the difference between a system boiler and a combi boiler?

A system boiler heats water and stores it in a separate cylinder, typically unvented for mains-pressure hot water, without needing a loft tank. A combi heats water directly on demand with no cylinder. System boilers suit homes wanting strong, simultaneous hot water flow at multiple outlets without the loft tank a full open vent system requires.

Do I need a cylinder to use this boiler?

Yes. This is a system boiler supplied without a cylinder — it must be connected to a compatible hot water cylinder, typically unvented, to provide domestic hot water.

Can this boiler be converted to run on LPG?

Yes. The ecoTEC plus 615 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.

What size property does the ecoTEC Plus 615 suit?

With a 19.6kW maximum water generation output, the 615 suits smaller properties. Homes needing higher hot water capacity for multiple bathrooms may be better served by the 25kW ecoTEC plus 625 or 35kW ecoTEC plus 635.

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.

BTU Calculator

BTU & WATT Calculator

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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Required Heating

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Watts

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