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Firebird Envirogreen Slimline Combi C35 boiler

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Plumbproud rating

66.30%

Firebird Envirogreen Slimline Combi C35 Combi Oil boiler

On the PlumbProud boiler quality benchmark scoring system, we have rated this Firebird Envirogreen Slimline Combi C35 Combi boiler at 66.30%. Ratings are determined by considering a number of important factors including the energy efficiency, price installed, warranty length, and running costs of the boiler.

We would expect that, unless there are complications during fitting, this Firebird Envirogreen Slimline Combi C35 Combi boiler would cost £3,800 supplied and professionally installed through PlumbProud.

To contact us, please enter your postcode in the quote boxes on this page, click here to email us, or give us a call on 01604 343053. We can provide you with a free quote on the Firebird Envirogreen Slimline Combi C35 boiler and offer professional advice and guidance on whether this Firebird Envirogreen Slimline Combi C35 Combi boiler is the right choice for your home.


Installed price around

£3,800

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Firebird Envirogreen Slimline Combi C35 Combi Oil boiler frequently asked questions

Firebird Envirogreen Slimline Combi C35 - a system boiler, regular boiler or combi boiler?

If you’re looking for a combi boiler for your house or flat, you may wish to the consider the Firebird Envirogreen Slimline Combi C35.

The UK has some of the smallest homes in the Western world, which is partly why combi boilers were introduced in the 1970s. Traditional boilers require one or more large storage tanks which they use to either heat water and keep it warm or store water intended for heating later. These tanks took up a lot of space in people's homes.

Combi boilers save space because they don't require these tanks to operate. Instead, combis draw water direct from your mains supply then instantly heat and distribute it on demand.

The biggest disadvantage in using combi boilers is that they have a maximum capacity volume for heating water. While this may not be an issue in a small household, it could be for a larger household where there is higher demand for hot water. When more than one person is using the water, it is distributed between the two points, reducing the pressure and temperature at each point.

Is a Firebird Envirogreen Slimline Combi C35 combi a suitable choice for my house or flat?

Whether this Firebird Envirogreen Slimline Combi C35 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions, however - it means how powerful it is.

Measured in kilowatts, a boiler's output level is an indication of the amount of power it has available to it to heat the water coming from your taps and for warming your radiators. The greater the output level, the more water it can heat.

If you choose a boiler whose output level is too low, you'll often find that the water is not as hot as you want it to be. If you choose a boiler whose level is too high, you'll be paying higher oil bills than you need to for years to come.

The output of the Firebird Envirogreen Slimline Combi C35 combi is 35 kW, so which types of property is this Firebird Envirogreen Slimline Combi C35 Combi boiler appropriate for?

A Gas Safe boiler installer would recommend that, at this level of output, the most suitable type of property for this Firebird Envirogreen Slimline Combi C35 Combi boiler would be larger properties including detached homes with 15 or more radiators and two or more bathrooms.

With combi boilers, flow rates are as important a consideration as output rates.

All combi boilers draw water from the mains. They then heat this water instantly whenever it's needed and distribute it to your radiators and taps.

A boiler's "flow rate" describes how much water a boiler can draw from the mains at any one time, which it then heats and sends around your home (measured in litres per minute). This Firebird Envirogreen Slimline Combi C35 Combi boiler's flow rate is 16 L/m.

If your home has a large number of radiators, a lot of bathrooms, or multiple people who wish to use the hot water at the same time, your combi boiler may not be able to draw as much water from the mains as it needs to serve everyone, regardless of how high the flow rate is.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The dimensions of the Firebird Envirogreen Slimline Combi C35 are

The Firebird Envirogreen Slimline Combi C35 measures 855 mm high and 520 mm wide by a depth of 600 mm.

Despite the increase in demand for compact, wall-mounted boilers over the last 20 years, hundreds of thousands of homes still have large floor-standing boilers like the Firebird Envirogreen Slimline Combi C35. If you would like a wall-mounted boiler to replace your existing floor-standing unit to free up space, we can carry out this installation for you but please bear in mind that we may also need to replace your existing pipework, which will add extra costs to the work.

You should however be able to repay your investment in full within a few years with the savings you make on your oil bills.

If you are going to replace your current heat only or system boiler with the Firebird Envirogreen Slimline Combi C35, you'll also need to budget for the removal of your hot water cylinder and/or expansion tank.

Please get in touch with PlumbProud if you would like information and guidance on the best course of action and we will share our advice with you.

Is the Firebird Envirogreen Slimline Combi C35 non-condensing or condensing?

Condensing oil boilers like the Firebird Envirogreen Slimline Combi C35 are more energy-efficient and choosing one for your home will cut the amount you pay every year for your oil.

They do this by capturing the heat in water vapour condensation and in exhaust gases which would normally be expelled via the flue. They then recycle that heat, returning it to the system to, among other tasks, reheat colder water that is returning to your boiler from your radiators.

Is the Firebird Envirogreen Slimline Combi C35 combi environmentally friendly?

The effects of climate change on the environment are leading many homeowners to question the damage they might be doing by the way they heat their homes.

Central heating creates 14% of the UK’s greenhouse gases. And in Britain's larger cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Do the available figures suggest that installing the Firebird Envirogreen Slimline Combi C35 combi in your property would be an environmentally friendly choice?

Under current UK law, all boilers must achieve a minimum energy efficiency level of 92% (a low to good SEDBUK "A" rating). The minimum level was raised from its previous 88% in April 2018.

Energy efficiency scores are intended to inform consumers of the amount of energy used and wasted when a boiler is in normal operation.

The Firebird Envirogreen Slimline Combi C35 was awarded an efficiency rating of 93% with a SEDBUK band rating of "A".

The Energy Related Products Directive (ERP) was introduced in 2015 and it applies to all products that consume energy throughout their lifetime, including during the manufacturing process and at the point of final disposal.

The purpose of the ERP is to ensure that companies create products that are kinder to the environment by reducing both the energy they use and the harmful emissions they produce.

The Firebird Envirogreen Slimline Combi C35 has an ERP rating of "A" for heat and "A" for hot water production.

If the Firebird Envirogreen Slimline Combi C35 combi boiler breaks down, am I covered?

The Firebird Envirogreen Slimline Combi C35 boiler offers a parts and labour warranty of 2 years.


Firebird Envirogreen Slimline Combi C35 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW35 kW
Height855 mm
Width520 mm
Depth600 mm
MountingFloor
Flow rate16 L/m
ERP HeatA
ERP WaterA

The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%

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Firebird Envirogreen Slimline Combi C35 boiler

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Firebird Envirogreen Slimline Combi C35 Combi Oil boiler

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  2. Firebird Envirogreen Slimline Combi C35
Plumbproud rating for this boiler
66.30%

On the PlumbProud quality scoring system, we rate this Firebird Envirogreen Slimline Combi C35 Combi boiler at 66.30%. To determine a boiler's quality, we consider many different factors from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

We estimate that, on a standard, non-complicated installation, the supply and fitting charge for this Firebird Envirogreen Slimline Combi C35 Combi boiler will be around £3,800.

If you would like a free quote and professional advice and guidance to help you decide if the Firebird Envirogreen Slimline Combi C35 is the right choice for your home, please get in touch. You can do this by entering your postcode in the quote boxes on this page, click here to email us or give us a call on 01604 343053.


Installed price guideline
£3,800

Get your free quote

Firebird Envirogreen Slimline Combi C35 Oil Combi boiler specifications

Powered by GasOil
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?No
P/L Warranty2 Years
Output in kW35 kW
Height855 mm
Width520 mm
Depth600 mm
MountingFloor
Flow rate16 L/m
ERP HeatA
ERP WaterA

Firebird Envirogreen Slimline Combi C35 Combi Oil boiler frequently asked questions

Is the Firebird Envirogreen Slimline Combi C35 a combi, system or regular boiler?

Looking for a oil combi boiler for your flat or house? Then the Firebird Envirogreen Slimline Combi C35 may be an option you should consider.

Traditional boilers have one or more large tanks in which they store either heated water or water to be heated later. Manufacturers originally introduced combi boilers to the market in the 1970s to enable homeowners to save space - UK residential properties are among the smallest in the Western world.

Combi boilers don't need these tanks because they draw water directly from the mains and instantly heat it on demand thanks to the technology inside the boiler. Combi boilers then distribute this hot water to your home’s taps and radiators when needed.

The most significant disadvantage of combi boilers is that they are not ideal in larger homes where multiple people might want hot water at the same time – for example, if someone is having a shower while another wants to wash dishes in the kitchen. This is because combi boilers have a maximum volume of water that they can heat. When two people want hot water at the same time, the water temperature, pressure and volume delivered to both points drop.

Is the Firebird Envirogreen Slimline Combi C35 combi boiler a suitable option for my house or flat?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big the boiler is - it means how big its "output" is.

This Firebird Envirogreen Slimline Combi C35 Combi boiler gets its power from oil and the power it's capable of producing is measured in kilowatts - the output rate is actually a kilowatt rate. The higher the output rate, the more kilowatts a boiler can use when heating water.

If you choose a boiler whose output rate is too low, it may not have enough power to make your water as hot as you would like. If you choose a boiler whose output rate is too high, you won't have to put up with lukewarm water but you will face higher oil bills.

The Firebird Envirogreen Slimline Combi C35 combi boiler has an output level of 35 kW, so which types of property would it be appropriate for?

A PlumbProud Gas Safe boiler installer would recommend that this Firebird Envirogreen Slimline Combi C35 Combi boiler is appropriate for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

When choosing a combi boiler for your home, you need to think about "flow rates" as well as output rates. This Firebird Envirogreen Slimline Combi C35 Combi boiler's flow rate is 16 L/m.

This indicates the maximum volume of hot water (measured in litres per minute) that your boiler can heat then distribute to your taps, showers and radiators at any one time. The greater the demand for hot water in your home, the higher the flow rate you will require.

However, all combi boilers like the Firebird Envirogreen Slimline Combi C35 draw water directly from the mains and heat it instantly.

This means that they can only heat and distribute water at the rate it enters the property (the "mains pressure" rate). For example, if your mains pressure is 11 litres per minute, this will be the highest flow rate you can achieve even if your boiler's flow rate is 17l/m.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


The size of the Firebird Envirogreen Slimline Combi C35 in millimetres

The Firebird Envirogreen Slimline Combi C35 is 855 mm high by 520 mm wide by 600 mm deep.

While a large number of properties in the UK still feature floor-standing boilers like the Firebird Envirogreen Slimline Combi C35, the more compact wall-hung models are now the preferred options for most homeowners keen for more living space for themselves and their families. It is possible to replace your floor-standing unit with a wall-hung and more compact boiler but please note that much of the pipework could need replacing, making the overall cost of installation higher.

Your new compact will save you money on your oil bills every quarter, however, and those savings should cover the costs within a few years.

If you're considering replacing your existing heat only or system boiler with the Firebird Envirogreen Slimline Combi C35, you will also need to remove the hot water cylinder and/or expansion tank.

For information and guidance on the best course of action, please contact PlumbProud and we'll share our thoughts.

Is the Firebird Envirogreen Slimline Combi C35 non-condensing or condensing?

This Firebird Envirogreen Slimline Combi C35 is a condensing oil boiler - we always recommend that clients choose the latest condensing models to benefit from the technology, which continues to improve year after year.

Condensing boilers capture the heat still present in flue exhaust gases and water vapour condensation, processing them through a secondary heat exchanger to, among other tasks, heat colder water returning from your radiators.

By selecting a modern condensing boiler, you'll save money on your oil bills as well as benefitting the wider environment.

Is the Firebird Envirogreen Slimline Combi C35 combi boiler an environmentally friendly choice?

As more of us are increasingly concerned about climate change, how we heat our homes and its impact on the environment has become an issue of importance to homeowners.

Central heating creates 14% of the UK’s greenhouse gases. And in Britain's larger cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Would installing a Firebird Envirogreen Slimline Combi C35 combi boiler in your home help combat climate change? What do the figures suggest?

An energy efficiency rating of 92% or above is a legal requirement for all boilers manufactured and installed in the UK today. 92% is equivalent to a low-to-middle "A" grade on the "Seasonal Efficiency of Domestic Boilers" (SEDBUK) scale.

Energy efficiency measures how much energy a boiler uses and wastes in the course of its normal operation. The lower the waste, the lower your oil bills.

The Firebird Envirogreen Slimline Combi C35 was awarded an efficiency rating of "93%", equivalent to a "A" rating on the SEDBUK system.

Energy-efficient boilers help the environment as they require less fuel and emit fewer harmful gases. In 2015, the EU introduced the Energy Related Products Directive (ERP), the aim of which was to ensure that all manufacturers, including boiler manufacturers, developed more efficient products and processes.

The legislation aims to conserve energy at all life cycle stages from initial production to actual use by the customer, through to the point of disposal.

The Firebird Envirogreen Slimline Combi C35 has been given an ERP rating of "A" for heat and "A" for water.

How long am I covered by the warranty for if the Firebird Envirogreen Slimline Combi C35 breaks down?

You receive a parts and labour warranty of 2 years with the Firebird Envirogreen Slimline Combi C35 boiler.


The top 10 rated Oil Combi boilers

Using the Plumbproud scoring system, the current 10 ten Oil Combi boilers assessed using a number of important variables are as follows:

1Worcester Bosch Greenstar Heatslave II 12/1876.19%
2Worcester Bosch Greenstar Heatslave II 18/2576.12%
3Worcester Bosch Greenstar Heatslave II External 12/1875.95%
4Worcester Bosch Greenstar Heatslave II 25/3275.83%
5Worcester Bosch Greenstar Heatslave II External 25/3275.58%
6Grant Vortex Pro 2167.46%
7Grant Vortex Pro 2667.43%
8Grant Vortex Pro 26kW67.35%
9Grant Vortex Pro 2167.31%
10Grant Vortex Pro 2667.14%
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