Comparison Prices and Reviews for Vokera Unica i Combi Boilers Buyers Guide

The Unica i is a high specification condensing combi boiler range which is easy to service with its front facing profile. Advanced energy saving credentials define this product range, which boasts a class leading modulation ratio of 1:10. This enables the boiler to reduce its output to as little as 10% of its maximum output, reducing wasted energy.

  • Vokera Unica i28kW Combi Gas Boiler– The Vokera Unica HE is a high-efficiency combi gas boiler offering excellent performance benefits and cutting running costs by up to 35% compared to other similar spec models.
  • Vokera Unica i32kW Combi Gas Boiler– The Unica i32kW is a boiler made by Vokera. This combi gas boiler is condensing and wall mounted. This is a high specification range, with a selection of outputs such as the 28kW, 32kW and 36kW.
  • Vokera Unica i36kW Combi Gas Boiler– The Unica i36kW is a combi gas boiler by Vokera that is both wall mounted and condensing.

Name           Our Rating    Availability        Price               Efficiency Ratings

Vokera Unica i28kW Combi Gas Boiler8.8/10YES£75089.6%  
Vokera Unica i32kW Combi Gas Boiler8.7/10 YES£82589.6%
Vokera Unica i36kW Combi Gas Boiler8.2/10 YES£92089.2%

Vokera Unica i28kW Combi Gas Boiler

The Vokera Unica HE is a high-efficiency combi gas boiler offering excellent performance benefits and cutting running costs by up to 35% compared to other similar spec models.

It’s SEDBUK 2009 rated as ‘B’ with low emissions – of interest to environmentally-conscious customers.

Designed to be easy to install and fit the Vokera Unica HE pipework can be fitted before the boiler’s in place. It has an easy-to-fit condenser connection and is already factory set when delivered (and readily tested) which shortens the time needed to get it up and running!

The heat exchange has patented technology – with excellent thermal transfer and a minimized risk of corrosion.

The model also has the standard Vokera pipework which helps make it easy when replacing older models. Its flow rate is also the highest of all the entry-level model boilers in the current market!

This model has very easy-to-use features. For example, an automatic ‘self-start’ program stops the internal pump & valve from sticking during long ‘switch off’ periods.

There’s also an anti-cycling device that cuts wear and tear and inbuilt frost protection prevents problems in deepest Winter!

The control panel is intuitive – and don’t forget the ‘look’ – this boiler has stylish compact Italian finishing. This boiler is recommended by the Energy Saving Trust.

vokera unica-i28kw-combi-gas-boiler
boilerhttps://www.boilerguide.co.uk/productinfo/vokera/unica-i28kw-combi-gas-boiler

Advantages:

  • A-RATED COMBI BOILER
  • SAVES MONEY ON YOUR GAS BILL
  • CLASS LEADING MODULATION RATIO OF 10:1
  • REDUCE WASTED ENERGY

Disadvantage:

  • Boiler keeps losing pressure at times.

Features:

Band RatingB Rated
ERP RatingA HEAT, A WATER
Central Heating Max. Output28kW
Flow Rate11.5 l/min
LPG CompatibleYes
MountingWall mounted
Typical Price (inc VAT)£750
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,250 – £1,750

Product Key Specifications:

MakeVokera
ModelUnica i28kW Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.6%
Standard Warranty2 Years

Vokera Unica i32kW Combi Gas Boiler

The Unica i32kW is a boiler made by Vokera. This combi gas boiler is condensing and wall-mounted. This is a high specification range, with a selection of outputs such as the 28kW, 32kW, and 36kW.

It is highly efficient and has advanced energy-saving awards. It boasts a class of leading modulation ratio of 10:1, helping to reduce its output in line with the demand in your home – this can help to reduce wasted energy. This advanced technology allowing the Unica to be connected to opentherm control which is designed by Vokera.

The boiler is connected to opentherm control, helping to give you complete control over your heating and hot water and the most control over your boiler for added comfort. As well as this, it can save up to £67 a year on your fuel bills. This boiler not only has its advanced energy it is also known for its exceptional hot water flow rate of 14.7 liters per minute, meaning there is no need for storage cylinders or tanks.

This boiler not only has a high flow rate but also a high efficiency of 89.6% making it a B-rated boiler. Also, with this boiler comes an output of 36kW. To make sure you have the maximum comfort in your home it has instant heating and hot water. This boiler is an extremely user-friendly boiler with it being simple to operate helping to maximize the efficiency of your boiler as well as increase the comfort of your home. This boiler comes with a 5-year parts and labour warranty, giving you the security that you have a reliable boiler.

Advantages:

  • FRONT MOUNTED HEAT EXCHANGER
  • ASSISTS IN SIMPLE MAINTENANCE
  • BUILT-IN FROST PROTECTION
  • PREVENTS COLD WEATHER DAMAGE

Disadvantage:

  • The boiler breaks down at times.

Features:

Band RatingB Rated
ERP RatingA Heat, A Water
Central Heating Max. Output32kW
Flow Rate13.1 1/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£825
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,325 – £1,825

Product Key Specifications:

MakeVokera
ModelUnica i32kW Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.6%
Standard Warranty5 Years

Vokera Unica i36kW Combi Gas Boiler

The Unica i36kW is a combi gas boiler by Vokera that is both wall-mounted and condensing. With a high specification, this range has achievements for advanced energy saving, with it boasting a class-leading modulation ratio of 10:1 helping to reduce the output of the boiler in line with the demand in your home meaning it helps to reduce wasted energy.

This boiler has a high output of 36kW and an extremely high efficiency of 89.2% making it B rated. This boiler is also available in a range of outputs other than the 36kW, these are 28kW and 32kW.

With this unit having such advanced technology it also allows the Unica i36kW to connect to the Vokera Opentherm controls which helps to give you complete control over your heating and hot water requirements and can also save up to £67 a year on your fuel bills. With it having advanced energy savings but also providing exceptional hot water, you can be sure you can rely on this boiler.

With this boiler having instantaneous heating and hot water with a flow rate of 14.7 liters per minute you have no need for a storage cylinder or tank. It also comes with 5 years parts and labour warranty, to add to the security that you have an extremely reliable boiler.

vokera-unica-i36kw-combi-gas-boiler
https://www.boilerguide.co.uk/productinfo/vokera/unica-i36kw-combi-gas-boiler

Advantages:

  • HIGH EFFICIENCY BUDGET BOILER
  • GREAT OPTION FOR TENANT PROPERTIES
  • 5-YEAR PARTS AND LABOUR WARRANTY

Disadvantage:

  • Remote control might be a bit complicated

Features:

Band RatingB Rated
ERP RatingA Heat, A Water
Central Heating Max. Output36kW
Flow Rate14.7 l/min
LPG CompatibleYes
MountingWall Mounted
Typical Price (inc VAT)£920
Typical installation Cost (inc VAT)*£500 – £1,000
Total Cost£1,420 – £1,920

Product Key Specifications:

MakeVokera
ModelUnica i36kW Combi Gas Boiler
Is CondensingCondensing
Efficiency Rating89.2%
Standard Warranty5 Year

BUYING GUIDE- Vokera Unica i Combi Boilers

Given below is a detailed guide on Vokera Unica i Combi Boilers:

Vokera Service & Repairs

As part of having a boiler that is in warranty it is often suggested by manufacturers that you maintain the condition of your boiler by organizing a yearly Vokera boiler service. If you are planning on having a Vokera boiler service then a Gas Safe engineer will run checks on the boiler to ensure that it is functioning efficiently without any issues or faults, and more importantly, safely. Regularly keeping your boiler serviced could help prolong its life, so it could well be worth it in the long run!

When your boiler suddenly seizes to work it can cause an awful amount of distress and inconvenience. In the event of an issue with your boilers such as a breakdown or fault, if it’s within warranty, you can contact Vokera directly, alternatively, we can also offer support so feel free to contact us and we’ll help you get back up and running as soon as we possibly can.

Vokèra Warranty

Warranties are in place to provide you with the peace of mind you require when purchasing a boiler. They’re designed to provide aid in the unfortunate event that a fault occurs with your system. Having a warranty could mean that the manufacturer is liable to replace or repair the boiler at no added cost. Vokera boilers typically come with a manufacturer warranty of anywhere up to 7 years, with an additional option to extend this, depending on the model of boiler. This could provide you with cover for faulty parts inclusive of the controls. Please be aware that terms and conditions will apply and may be subject to change at any time, make sure that you check them through carefully, factors such as registering your boiler within the assigned period are often a requirement. Feel free to contact us if you’d like to learn more about Vokèra boiler warranties.

What Size Vokera Boiler Is Right for My Home?

With the variety of boilers available from Vokèra, it can be tough to decide which option is best. We’re here to provide you with the help you need to ensure that you make the right choice, so don’t hesitate to contact us if you’re feeling stuck. When choosing your new Vokera combi boiler, factors to consider include: your budget, your heating and hot-water needs, the space available in your home, and the kW output that may be required. The kW output will dictate the ability to cope with the heating requirements of When choosing your new Vokera combi boiler, factors to consider include: your budget, your heating and hot-water needs, the space available in your home, and the kW output that may be required. The kW output will dictate the ability to cope with the heating requirements of your home; this is primarily determined by the number of bathrooms and radiators you have within the property.

Why Should You Choose a Vokèra?

Vokera boilers are committed to providing homeowners with a complete home heating package. Striving to achieve their customer-focused goals, the brand prioritizes the manufacture of energy-efficient and reliable domestic heating products to meet the needs of customers throughout the UK and Ireland.

Constantly planning for the future, Vokera’s dedication to continual innovation and technical advancement fuels their production of top-quality heating products and has led them to become a popular brand within the industry. Aiming to maximize your comfort, Vokera boilers are designed with efficiency, convenience, and ease of use in mind. With a strong set of internal values and an ethos that keeps customer service at the basis of all their decisions; you could rest assured knowing that boilers from this brand are created to effectively meet your needs.

What do Industry Experts have to Say?

Neil Mattock, Marketing Director at Vokèra, looks at the key issues that will affect the boiler industry.

One of the biggest changes expected this year is the introduction of the ErP (Energy-related Products) Directive. ErP is a mandatory piece of EU legislation which will create minimum efficiency standards for heating and hot water systems, by ensuring that manufacturers meet energy labelling and eco-design requirements. It is designed to help achieve a targeted EU reduction in greenhouse gas emissions of 34% by 2020 and 80% by 2050.

In essence, the ErP will ensure that specific design requirements are met and that products are labelled with their energy efficiency ratings, named the Labelling Directive. The energy performance labels are rated from G to A+++, in a similar way to the ratings already found on domestic white goods.

Overall, the aim is to drive change and encourage the uptake of more energy efficient boilers, allowing installers and consumers to compare the respective performances of different products in a clearly labelled, easily recognizable way.

After the introduction of ErP, manufacturers will not be able to produce boilers below a particular efficiency.

Of course, improving efficiency continues to be a very important goal for manufacturers, ahead of the ErP introduction, and there is much that has been done to help installers reduce fuel bills and carbon emissions for their customers.

Boiler modulation will continue to be a significant area of innovation. In simple terms, this is the boiler’s ability to reduce its maximum output to its minimum output. A wide modulation range will provide a good output ratio, whereas a narrow modulation will give a poor ratio. For example, if a boiler has a maximum output of 30kW and a minimum output of 7.7kW its modulation ratio is less than 4:1. Meanwhile, an appliance with a maximum output of 30kW and a minimum output of 3kW has a wider modulation ratio of 10:1. This will both improve comfort levels and significantly reduce the wear and tear of the boiler itself, consequently improving the overall efficiency of the boiler.

Interactive controls will also play their part in making boilers as efficient as possible. Linking the boiler to an intelligent thermostat control can contribute to efficiency improvements. For example, Vokèra has recently introduced its OpenTherm protocol RF programmable room thermostat to improve boiler operating efficiency still further. Simple to install, this product modulates the boiler’s outlet flow-temperature in line with the internal temperature to substantially reduce a home’s energy consumption by as much as 10%.

Weather compensation controls regulate the output of the boiler in line with the outside temperature, and will lead to further savings of 3% under SAP, which allows the space heating efficiency to also rise by 3%. Our research shows that having no temperature control or no boiler ‘interlock’ will impair efficiency by as much as 5%.

Installing a combi boiler with a high maximum output and a wide modulation ratio will deliver optimal efficiency and comfort. Vokèra has made a significant investment in the development of boilers with excellent modulation ratios. For example, our latest Unica i28, Unica i32 and Unica i36 boilers all feature a class-leading modulation ratio of 10:1. This range also incorporates weather compensation and OpenTherm technology to further enhance fuel efficiency and comfort still further.

2021 is going to be an exciting year for the boiler industry and here at Vokèra we are looking forward to the challenges ahead. We have all the tools and information installers need to understand the changes and make the most of the upcoming opportunities.

https://www.vokera.co.uk/news/page/7/

Construction and Material

PRINCIPLE COMPONENTS

· A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, self-diagnostic fault indicator, full air/gas modulation

· Aluminium heat exchanger

· Electronic ignition with flame supervision

· Integral high-head pump

· Fan

· Expansion vessel

· Water pressure switch

· Flue sensor

· Pressure gauge

· Safety valve

APPARATUS MODE (at rest)

When the appliance is at rest and there are no requests for heating or hot water, the following functions are active:

· frost-protection system – the frost-protection system protects the appliance against the risk of frost damage both for CH and DHW. For CH line, if the main temperature falls to 5°C, the appliance will function on minimum power until the temperature on main reaches 35°C. Moreover, if the DHW temperature falls to 5°C, the appliance will function on minimum power until the temperature on main reaches 55°C.

· anti-block function – the anti-block function enables the pump and diverter valve actuator to be energized for short periods when the appliance has been inactive for more than 24-hours.

APPARATUS MODE (Heating)

When there is a request for heat via the time clock and/or any external control, the pump and fan are started, the fan speed will modulate until the correct signal voltage is received at the control PCB. At this point an ignition sequence is enabled. Ignition is sensed by the electronic circuit to ensure flame stability at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to 75% for a period of 15 minutes. Thereafter, the boiler’s output will either be increase to maximum or modulate to suit the set requirement. When the appliance reaches the desired temperature, the burner will shut down and the boiler will perform a three-minute anti-cycle (timer delay). When the request for heat has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the appliance.

APPARATUS MODE (Hot water)

When there is a request for DHW via a hot water outlet or tap, the pump and fan are started, the fan speed will modulate until the correct signal voltage is received at the control PCB. At this point an ignition sequence is enabled. Ignition is sensed by the electronic circuit to ensure flame stability at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to maximum or will modulate output to stabilize the temperature. In the event of the appliance exceeding the desired temperature (set point) the burner will shut down until the temperature drops. When the request for DHW has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the appliance.

SAFETY DEVICES

When the appliance is in use, safe operation is ensured by:

· a water pressure switch that monitors system water pressure and will de-activate the pump, fan, and burner should the system water pressure drop below the rated tolerance;

· fan speed sensor to ensure safe operation of the burner;

· a high limit thermostat that over-rides the temperature control circuit to prevent or interrupt the operation of the burner;

· flame sensor that will shut down the burner when no flame signal is detected;

· flue sensor;

· a safety valve which releases excess pressure from the primary circuit.

Research & methodologies used behind the in-depth analysis Vokera Unica i Combi Boilers:

More than 1.5 million Vokèra boilers have been installed around the UK and Ireland demonstrating our wealth of experience in home heating. Vokèra is recognized for the quality and reliability of its products with one of the highest reliability statistics in the market coupled with a 30-year unblemished record of product quality. At every stage, from research and development through to production and after sales support, we build quality in as standard. Safety is our number one priority, Vokèra is ISO 9001 approved, supports the ‘benchmark’ initiative, are members of the Heating and Hot Water Industry Council, Association of Plumbing and Heating Contractors, the Energy Utilities Alliance and Gas Safe Register. In support of this we back our Vision boiler range with a 5- or 7-year warranty option, our Linea One, Unica i and Mynute i ranges with a 5-year warranty and our other boiler ranges with a 2-year warranty.

Highest technology – 10:1 modulation ratio by incorporating the most advanced technology available an extremely high modulation ratio of 10:1 has been achieved. This modulation range means that the Linea One can satisfy the heating and hot water requirements for domestic properties of different sizes, from one-bedroom flats to larger detached homes whilst maintaining its efficiency. Its modulating pump can reduce electrical consumption by up to 50%, helping to reduce fuel bills and also minimize any temperature fluctuations to provide a continuous flow of hot water, ensuring total end user comfort. The Linea One is backed by a 5-year parts and labour warranty (subject to registration and annual servicing), highlighting the quality and build of the appliance.

https://www.wolseley.co.uk/wcsstore7.00.1066.986/ExtendedSitesCatalogAssetStore/images/products/AssetPush/DTP_AssetPushHighRes/std.lang.all/hu/re/Vokera_Brochure.pdf

Stories from the real-world use cases





Up until now, five-year-old Molly’s family have been living in a house that has simply does not meet her needs. Molly, who has learning disabilities, needed a home that could allow her and her family to carry out everyday activities such as washing, staying warm and moving about. Vokèra was more than happy to get involved in a complete refurbishment headed by Eco technicians Co-operative, working fast to install a new Unica i32 combi boiler and BeSMART thermostat control system.
 Molly’s mum, Tina Roberts, was determined to fully adapt their home to give Molly the best possible chance at independence, which meant that the property required quite a substantial amount of conversion. The existing boiler was removed before volunteer tradesmen checked and re-routed the gas supply to ensure the new boiler and fixings worked effectively. A vertical flue was installed to guarantee proper functionality and allow condensation to flow out from the roof of the house.
“We were very pleased to get involved in this charity installation,” comments David Iszchak, Technical Trainer at Vokèra, who was involved in the installation. “As well as the boiler, we have installed the BeSMART Wi-Fi enabled connected thermostat, which means Molly’s family are now able to control the boiler remotely from each zone of the house, heating up the rooms she’s in when needed. Having put the boiler in the loft, we also managed to free up extra floor space for the bathroom conversion, giving Molly more room to move around.”
 Eco technicians installer members offered a helping hand in sourcing donations from a number of manufacturers who were willing to update the heating and hot water supplies and Surrey Heath Borough Council also provided a disabilities funding grant in aid of the installation. The team of six volunteers managed to finish the heating installation in one day, giving the operation team a chance to move in early and continue with necessary building work and components. Soon, Molly and her family will be able to move back into their beautifully adapted home with ease.
 
https://www.vokera.co.uk/young-mollys-house-turns-into-a-home/#more-10069

https://www.vokera.co.uk/wp-content/uploads/2016/10/Vokera-Boiler-Installed-Molly-450×600.jpg

Up until now, five-year-old Molly’s family have been living in a house that has simply does not meet her needs. Molly, who has learning disabilities, needed a home that could allow her and her family to carry out everyday activities such as washing, staying warm and moving about. Vokèra was more than happy to get involved in a complete refurbishment headed by Eco technicians Co-operative, working fast to install a new Unica i32 combi boiler and BeSMART thermostat control system.

 Molly’s mum, Tina Roberts, was determined to fully adapt their home to give Molly the best possible chance at independence, which meant that the property required quite a substantial amount of conversion. The existing boiler was removed before volunteer tradesmen checked and re-routed the gas supply to ensure the new boiler and fixings worked effectively. A vertical flue was installed to guarantee proper functionality and allow condensation to flow out from the roof of the house.

“We were very pleased to get involved in this charity installation,” comments David Iszchak, Technical Trainer at Vokèra, who was involved in the installation. “As well as the boiler, we have installed the BeSMART Wi-Fi enabled connected thermostat, which means Molly’s family are now able to control the boiler remotely from each zone of the house, heating up the rooms she’s in when needed. Having put the boiler in the loft, we also managed to free up extra floor space for the bathroom conversion, giving Molly more room to move around.”

 Eco technicians installer members offered a helping hand in sourcing donations from a number of manufacturers who were willing to update the heating and hot water supplies and Surrey Heath Borough Council also provided a disabilities funding grant in aid of the installation. The team of six volunteers managed to finish the heating installation in one day, giving the operation team a chance to move in early and continue with necessary building work and components. Soon, Molly and her family will be able to move back into their beautifully adapted home with ease.

Top Reviews

Name: Mike

Date and Time: 29/10/2017 at 1:16 pm

Feedback in Detail:

We were going to have a Worcester boiler but the plumber recommended a Vokera i32
plus their BeSmart thermostat and Wi-Fi receiver. We had never heard of Vokera so were unsure however registering the boiler and the BeSmart at the same time gives you a 10-year warranty so we went ahead. That was in December 2016, so far so good no complaints the BeSmart app is easy to use but the thermostat is not that user friendly.

Name: Carole

Date: 10 Nov 2020

Feedback in Detail:

Very impressed with my new boiler. Extremely efficient and I’m yet to discover whether cost effective too. I am sure it will be as everything else seems to be hunky-dory.

Name: Mrs. Bernadette Kane.

Date: 9 Nov 2020

Feedback in Detail:

Although this boiler has been fitted in our static caravan, I still want to rate it a five-star product. It is so easy to use and the power it gives out is brilliant. Through lockdown we haven’t been able to use it to it’s full potential, what I have experienced so far is tremendous.

Name: MUHAMMAD

Date: 7 Nov 2020

Feedback in Detail:

Brilliant boiler i have got in all of my properties excellent customer service highly recommended.

Name: Caroline Russell

Location: United Kingdom

Date: 6 Nov 2020

Feedback in Detail:

Never felt so warm and cozy. Effective heat low running costs.

https://uk.trustpilot.com/review/vokera.co.uk?stars=5&aspects=boiler

FAQs:

Q: HOW TO TOP-UP THE SYSTEM PRESSURE

A: The system pressure must be checked periodically to ensure the correct operation of the boiler. The needle on the gauge should be reading between 1 and 1.5 BAR when the boiler is in an off position and has cooled to room temperature. If the pressure requires ‘topping-up’ use the following instructions as a guide.

● Locate the filling valve connections.

● Attach the filling loop to both connections.

● Open the filling valve slowly until you hear water entering the system.

● Close the filling valve when the pressure gauge (on the boiler) reads between 1 and 1.5 BAR.

● Remove the filling loop from the connections.

Q: HOW TO RESET THE APPLIANCE

A: When the red fault LED is illuminated, the appliance will require to be reset manually. Allow a period of two minutes to elapse before rotate the mode selector knob across the OFF/RESET position.

IMPORTANT

If the appliance requires to be reset frequently, it may be indicative of a fault, please contact your installer or Vokera Customer Services for further advice.

Q: HOW TO SHUT DOWN THE SYSTEM FOR SHORT PERIODS

A: The system and boiler can be shut down for short periods by simply turning the time clock to the off position. It is also advisable to turn off the main water supply to the house.

Q: HOW TO SHUT DOWN THE SYSTEM FOR LONG PERIODS

A: If the house is to be left unoccupied for any length of time – especially during the winter – the system should be thoroughly drained of all water. The gas, water, and electricity supply to the house should also be turned off. For more detailed advice contact your installer.

Q: HOW TO CARE FOR THE APPLIANCE

A: To clean the outer casing use only a clean damp cloth. Do not use any scourers or abrasive cleaners.

DID YOU KNOW?

  • This boiler not only has its advanced energy it is also known for its exceptional hot water flow rate of 14.7 litres per minute, meaning there is no need for storage cylinders or tanks. This boiler not only has a high flow rate but also a high efficiency of 89.6% making it an B rated boiler.

https://www.boilerguide.co.uk/productinfo/vokera/unica-i32kw-combi-gas-boiler

  • Vokera boilers are known for being cheap rather than good. On average, you save around 20% buying a Vokera boiler rather than a leading brand like Worcester Bosch or Ideal, which makes them popular among bargain hunters. But be careful: cheap boilers are often made cheaply and will tend to break down more often.
  • There are many possible reasons why a Vokera boiler will fail to ignite: faulty ignition leads or electrode (needed to make the spark to create the flame), blocked flue or condensate pipe, issue with the gas valve or a printed circuit board (PCB) fault.

https://www.boilerguide.co.uk/manufacturers/vokera/repair-advice

  • The pressure gauge shows the current pressure of the system, the gauge should be set between 1 and 1.5 bar. When the appliance is operating the gauge may rise or fall slightly, this is quite normal. The minimum permissible level for the safe and efficient operation of the appliance is 0.5 bar.

https://www.vokera.co.uk/wp-content/uploads/2009/04/syntesi_users_instructions.pdf

  • A sticker is usually found either on the boiler itself or inside the front panel. When you find the serial number, go to the 3rd and 4th number of the serial code, and this will be the year the boiler was manufactured.

Conclusion:

Vokera’s Unica i combi has the ability to provide exceptional how water comfort without the use of a storage tank or cylinder, making it a great choice if your home is short on storage space. This user-friendly boiler is also the perfect solution if you’re an energy-conscious homeowner because it is packed with features that help to maximize energy savings.

Installation is made straightforward as well, even if your walls are uneven which is all thanks to the fixing jig and rear flue option. And if you do decide to combine the Unica i with a suitable optional smart control, you won’t need to find a Part P qualified electrician to install it because a simple ‘Plug & Play’ connection has been included.

We particularly like its high modulation ratio as it means the boiler is suitable for not only medium to large homes but also new-build properties with lower space-heating requirements. To be fair, there isn’t anything we don’t like about the very reasonably priced Vokera Unica i.

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