Choosing a new boiler can be difficult when there are so many models available. The Vaillant ecoFIT Pure 835 is a compact 35kW combi boiler designed to provide central heating and hot water from a single unit.
This Vaillant ecoFIT Pure 835 review looks at its main features, output, efficiency, controls and suitability for different homes.
Vaillant has been developing heating systems since 1874 and is one of the established names in the heating industry.
The ecoFIT Pure range is designed for homes where a compact boiler is useful without sacrificing heating and hot water performance.
As a combi boiler, the ecoFIT Pure 835 provides central heating and heats mains water directly when hot water is required. It does not need a separate hot water cylinder, which can make it a practical option where space is limited.
- Content Guide
- » Vaillant ecoFIT Pure 835 Key Features
- - Compact Design
- - Efficiency and Performance
- - Controls and Smart Technology
- » Maintenance and Fault Diagnostics
- » Vaillant ecoFIT Pure 835 Specifications
- » Is the Vaillant ecoFIT Pure 835 Worth Considering?
- » Vaillant ecoFIT Pure 835 Controls
- » Boiler Plus Standard
- » Thermostat and Smart Control Options
- » Frequently Asked Questions
- » Get a Vaillant Boiler Installation Quote
Vaillant ecoFIT Pure 835 Key Features
The ecoFIT Pure 835 combines a compact design with a 35kW maximum hot water output.
Compact Design
The boiler measures approximately 700mm high, 390mm wide and 295mm deep. Its compact dimensions allow for flexible installation, including within many standard kitchen cupboards.
Efficiency and Performance
The ecoFIT Pure 835 has an A energy efficiency rating and a stated efficiency of 94%.
Its maximum central heating output is 26.7kW, while the maximum hot water output is 35kW. The stated hot water flow rate is 14.1 litres per minute.
These outputs make the 835 a model worth considering for medium-sized homes where hot water demand is an important factor.
Controls and Smart Technology
The ecoFIT Pure can work with Vaillant's vSMART system, allowing homeowners to control heating remotely using an app.
Depending on the controls fitted, homeowners can adjust temperatures, set heating schedules and manage their system more conveniently.
The boiler can also use load and weather compensation to adjust its operation according to heating demand and outside conditions.
Maintenance and Fault Diagnostics
The ecoFIT Pure 835 has an accessible layout, with components designed to be replaceable from the front of the boiler.
Its display also provides information such as operating temperature and fault codes, making basic fault identification easier for homeowners and engineers.
Vaillant ecoFIT Pure 835 Specifications
Specification Vaillant ecoFIT Pure 835 Boiler type Condensing combi boiler
Energy rating A
Stated efficiency 94%
Central heating output 26.7kW maximum
Hot water output 35kW maximum
Stated flow rate 14.1 litres per minute
Dimensions 700mm H × 390mm W × 295mm D
Indicative cost: £1,900–£2,500 (get a personalised quote for your property)
Warranty: standard 2-year guarantee, extendable up to 10 years with a Vaillant Advance-registered installer
The actual cost of a new boiler installation will depend on the property, existing heating system, installation requirements and any additional work needed. Contact Serviceteam for a quote based on your home.
Is the Vaillant ecoFIT Pure 835 Worth Considering?
The ecoFIT Pure 835 may be worth considering if your existing boiler is old, unreliable or increasingly expensive to maintain.
Common signs that it may be time to consider an upgrade include:
- Frequent boiler repairs
- Repeated fault codes
- Persistent leaks
- An older boiler with poor efficiency
- Increasing heating and hot water problems
A newer boiler can provide improved efficiency and may reduce the amount of maintenance required compared with an ageing system.
The ecoFIT Pure 835 is particularly worth looking at if you want a compact combi boiler with a 35kW hot water output.
Before choosing any boiler, however, the required output should be assessed against the size of the property and hot water demand.
If you're comparing the ecoFIT Pure 835 with other models, our guide to the best combi boilers in the UK covers some of the other options worth considering.
Vaillant ecoFIT Pure 835 Controls
The control panel is located on the front of the boiler and provides access to basic operating functions.
The display can show information such as operating temperature and fault codes, so homeowners can identify when the boiler requires attention.
Boiler Plus Standard
Boiler Plus introduced additional requirements for combination boiler installations in England from April 2018.
These include time and temperature controls, alongside one additional energy-efficiency measure for combi boilers. Options include weather compensation, load compensation, smart controls and passive flue gas heat recovery.
The appropriate control setup depends on the boiler and installation.
Thermostat and Smart Control Options
Homeowners can choose from different types of heating controls, including mechanical, programmable and smart thermostats.
Vaillant's vSMART system provides smartphone-based control, while other smart thermostat options are also available.
Smart controls can allow homeowners to adjust temperatures and heating schedules remotely.
Frequently Asked Questions - (FAQs)
Is the Vaillant ecoFIT Pure 835 a Good Boiler?The ecoFIT Pure 835 has several useful features, including its compact dimensions, A-rated efficiency and 35kW maximum hot water output.
It is worth considering for homeowners who need a compact combi boiler with a relatively high hot water output.
What's the Difference Between Vaillant ecoTEC and ecoFIT?The main difference is the design and positioning of the two ranges.
Vaillant ecoTEC models are available across a broader range of outputs and configurations. The ecoFIT range focuses more on compact installation while still providing high efficiency.
The right choice depends on the property, heating demand and available installation space.
How Long Does Vaillant ecoFIT Pure 835 Installation Take?Installation time depends on the property and the complexity of the work.
A straightforward boiler replacement may be completed within a day, while more involved installations can take longer.
How Many Radiators Can the ecoFIT Pure 835 Handle?The ecoFIT Pure 835 is suitable for properties with around 15 to 20 radiators and up to two bathrooms, though this should be treated as a guide rather than a fixed limit.
However, radiator numbers alone should not be used to size a boiler. The required central heating output and hot water demand should be assessed for the individual property.
Which Type of Home Is the ecoFIT Pure 835 Suitable For?The ecoFIT Pure 835 can be a suitable option for medium-sized homes that need a compact combi boiler.
It has a maximum central heating output of 26.7kW and a maximum hot water output of 35kW.
The final boiler choice should be based on the property's heating requirements, hot water demand and installation conditions.
Get a Vaillant Boiler Installation Quote
If you're considering replacing your existing boiler with a Vaillant ecoFIT Pure 835, Serviceteam can assess your property and advise on the appropriate installation.
If you decide the ecoFIT Pure 835 is suitable for your home, our boiler installation in London service can help with the next step.
Request a quote to find out what would be involved in replacing your current boiler.
