The Vaillant ecoFIT Pure 830 (MPN 10020390) is a 30kW gas combi boiler that heats water directly from the mains, providing central heating and instant hot water without a separate cylinder or loft tank. It's designed for homes with up to 15 radiators and up to two bathrooms, where the compact, single-unit footprint frees up cupboard or loft space that an open vent system would otherwise use.
Hand-built at Vaillant's award-winning UK manufacturing facility, the 830 is Quiet Mark certified for reduced-noise operation and finished with a high-quality aluminium heat exchanger designed for a long service life and easier maintenance. A rear flue option alongside the standard top exit gives installers extra flexibility for kitchen-cupboard fits.
700×390×295
Dimensions (mm)
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.
Compact Cupboard Fit
A compact, lightweight design fits comfortably inside a standard kitchen cupboard, with a rear flue option available for even greater siting flexibility.
Quiet Mark Certified
Awarded the Quiet Mark by the Noise Abatement Society for its innovative reduced-noise design, suiting flats, terraces and other noise-sensitive homes.
High-Spec Heat Exchanger
A high-quality aluminium heat exchanger is engineered for long life and easier maintenance, helping keep running costs down over the boiler's lifetime.
Front-Accessible Servicing
An accessible internal layout allows all major components to be replaced from the front of the boiler, keeping service visits quick and straightforward.
Clear Status Display
A clear LED display keeps operation and fault code identification straightforward, even in poorly lit installation locations.
App-Ready Controls
Fully compatible with Vaillant's vSMART app-based control and wider intelligent controls range, for heating management on the go.
Domestic Hot Water
Max Heat Output (DHW)
30 kW
DHW Flow Rate (Δ35K)
12.2 L/min
Central Heating Output
25.4 kW
Physical & Connections
Dimensions (H × W × D)
700 × 390 × 295 mm
Heat Exchanger Material
Aluminium
Emissions & Efficiency
ErP Rating (Heating & Hot Water)
A
Compliance & Coverage
Manufacturer Part Number (MPN)
10020390
Warranty
Standard warranty; up to 7 years with Vaillant Advance registration
What size property does the ecoFIT Pure 830 suit?
With a 30kW DHW output and 12.2 L/min flow rate, the 830 suits homes with up to around 15 radiators and up to two bathrooms with modest simultaneous demand. Larger properties may be better served by the 35kW ecoFIT Pure 835, which shares the same footprint.
Do I need a cylinder or loft tank with this boiler?
No. As a combi boiler, the ecoFIT Pure 830 heats hot water on demand directly from the mains, so no separate hot water cylinder or cold water feed tank is required.
How do I get the full 7-year warranty?
The standard guarantee period applies out of the box. To extend this to up to 7 years, the boiler must be registered with Vaillant Advance by a registered Advance partner installer — confirm current eligibility and steps with Vaillant before completing the installation.
Can the flue exit through the rear of the boiler?
Yes. The ecoFIT Pure 830 supports a rear flue option in addition to the standard top flue, giving installers extra flexibility when siting the boiler.
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.
