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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

Using factors such as price installed, manufacturer guarantees, energy efficiency and the likely cost of running, among others, this model has been rated as scoring 66.30% on the PlumbProud boiler benchmarking system.

You should budget around £3,800 for the supply and installation of this Firebird Envirogreen Slimline Combi C35 Combi boiler by PlumbProud.

For a free quote on the Firebird Envirogreen Slimline Combi C35 boiler and to get professional advice and guidance on whether it is the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call us on 01604 343053.


Installed price around

£3,800

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Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

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 are considering installing a combi boiler in your house or flat, then the Firebird Envirogreen Slimline Combi C35 boiler is certainly worth investigating.

Traditional boilers require at least one large cylindrical tank to work, normally housed in a large landing cupboard, utility room or the attic. As the UK has some of the world's smallest residential properties, manufacturers introduced the combi boiler in the 1970s to address the issue of space while meeting homeowners' need for central heating and hot water at the same time.

Combi boilers don't need external storage tanks. Instead, they draw water directly from the mains, heat it and then distribute it on demand to the areas where it is needed.

The most important disadvantage of combi boilers is that they have a maximum capacity for the amount of water they can heat up. This means that, if one person in your household is having a shower and another person turns on a hot water tap elsewhere, then the volume, pressure and temperature of the water to both points decreases.

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

Selecting the right boiler for your property means selecting a boiler that is the right size. And, by size, we don't mean how big it is, we mean how powerful it is - the "output".

The output of a boiler is measured in kilowatts. The output level determines the maximum power a boiler can use in heating the water needed for the baths, showers, taps and radiators in your home.

It's important to choose a boiler with an appropriate level of output for your property. Your boiler should be able to cope with periods of peak demand in your property and not just your average usage.

An output rate that is too low will result in an inadequate supply of hot water, while an output that is too high will mean the boiler will cost more to run than is necessary.

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

An experienced PlumbProud Gas Safe boiler installer would likely recommend that this Firebird Envirogreen Slimline Combi C35 Combi boiler would be suitable for 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.


How large is a Firebird Envirogreen Slimline Combi C35 boiler?

The Firebird Envirogreen Slimline Combi C35 measures 855 mm in height and has a width of 520 mm and a depth of 600 mm.

Many homeowners dislike the floor-standing boilers (like the Firebird Envirogreen Slimline Combi C35) they have in their properties because they feel that they are bulky and take up too much room. If this is you and you want to replace what you have now with a compact, wall-mounted boiler, we can do this for you, although please note that you may need to pay for new piping.

The oil bill savings offered by modern boilers are significant, however, and you should be able to recoup your investment in a few years.

If you are considering replacing your current heat only or system boiler with the Firebird Envirogreen Slimline Combi C35, please be aware that this will involve removing your hot water cylinder and/or expansion tank.

For guidance and further information, please contact the team at PlumbProud who will be happy to help you make the right choice.

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

We recommend that, if possible, you select one of the very latest condensing oil boilers on the market like the Firebird Envirogreen Slimline Combi C35.

Condensing boilers are better for the environment because they capture and recycle the heat still present in flue exhaust gases and water vapour condensation for re-use, meaning lower greenhouse gas emissions.

They're also a lot cheaper to run meaning that, if you're replacing a very old and inefficient boiler, the savings on your oil bill over 5-10 years add up to more than you pay for the boiler itself.

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

With so many of us worried about the environmental impact of our personal choices, the relationship between how we heat our homes and climate change has become an important issue for many homeowners.

In the UK, central heating is responsible for 14% of greenhouse gas production. Domestic gas boilers emit large quantities of nitrogen dioxide in British cities.

If you decide to install a Firebird Envirogreen Slimline Combi C35 combi in your home, will you be helping the environment with your choice? Let’s have a look at the figures.

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

The Firebird Envirogreen Slimline Combi C35 has an efficiency rating of 93% with a SEDBUK grade of "A".

The ERP (or Energy Related Products Directive) is a European regulation governing products which require energy to operate throughout their lives and encourages manufacturers to create products that are more environmentally friendly.

The legislation is designed to reduce the potential for harmful gas emissions during manufacturing and actual use right through to the point of final disposal.

For the Firebird Envirogreen Slimline Combi C35, the ERP rating is "A" for heat and "A" for hot water production.

How long is the warranty period on a Firebird Envirogreen Slimline Combi C35 combi boiler?

The Firebird Envirogreen Slimline Combi C35 is supplied with 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%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

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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%

We have determined a rating of 66.30% for this Firebird Envirogreen Slimline Combi C35 Combi boiler on the PlumbProud quality scoring system. The rating is determined using a variety of important factors including price installed, manufacturer guarantees, energy efficiency and the likely cost of running.

We would anticipate that this Firebird Envirogreen Slimline Combi C35 Combi boiler would cost you £3,800 fully installed through PlumbProud provided that the fitting is standard and with no complications.

You can get more information and a free quote for the Firebird Envirogreen Slimline Combi C35 boiler by entering your postcode in the quote boxes on this page, clicking here to email us, or by giving 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 boiler a standard, combi or system model?

You might want to consider the Firebird Envirogreen Slimline Combi C35 for your house or flat if you are looking for a combi boiler.

Combi boilers have much to recommend them - not least the fact that they save a lot of space. Combination (or combi) boilers were introduced by manufacturers in the 1970s to provide practical central heating and hot water distribution to smaller properties - remember that UK houses and flats tend to be among the smallest in the developed world.

Traditional boilers require one or more storage tanks to keep hot water warm and to store water for heating later. In contrast, combi boilers draw water directly from the mains supply and heat it instantly, removing the need for a storage tank. The heated water is then distributed to your taps and radiators on demand.

While combi boilers are suitable choices for many properties, especially those without a loft, there is also a disadvantage in using them. Water is heated instantly and the volume of water that can be heated at any one time is limited. This can result in less water being sent to taps and showers if more than one is being used simultaneously. In these instances, the water pressure to both points will drop.

Should I install a Firebird Envirogreen Slimline Combi C35 combi boiler in my house or apartment?

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?

An experienced PlumbProud Gas Safe boiler installer would almost certainly recommend that this Firebird Envirogreen Slimline Combi C35 Combi boiler would be most suitable for larger properties including detached homes with 15 or more radiators and two or more bathrooms.

You also need to choose a combi boiler with the right flow rate for where you live.

A combi boiler's flow rate is the maximum volume of water (measured in litres per minute) that it can heat and distribute to your radiators, taps and showers at the same time. This Firebird Envirogreen Slimline Combi C35 Combi boiler's flow rate is 16 L/m.

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

If your mains pressure is 12 litres per minute, your boiler can only heat and distribute hot water at a rate of 12 litres per minute even if it has a higher flow rate.

Combi boilers also struggle when multiple people in your home want to use hot water at the same time - for example, someone running the hot water tap in the kitchen and two people wanting to shower in separate bathrooms.

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.


How large is the Firebird Envirogreen Slimline Combi C35?

The size of the Firebird Envirogreen Slimline Combi C35 boiler is 855 mm high, 520 mm wide, and 600 mm deep.

Wall-hung boilers have become the preferred choice for homeowners in the UK over the last 20 years, but hundreds of thousands of homes still use bulkier floor-standing models for their central heating. It is possible to replace your floor-standing boiler with a wall-mounted one if you wish so that you and your family have more living space. But we must advise you that you may also have to pay to replace some or all of your existing pipework.

You should however be able to recoup this cost in full after a few years because of the savings you make each quarter on your oil bills.

When replacing an existing heat only or regular boiler with the Firebird Envirogreen Slimline Combi C35, please be aware that you'll need to budget for the costs associated with removing your expansion tank/hot water cylinder.

For more information and advice, please contact PlumbProud today.

Firebird Envirogreen Slimline Combi C35 – condensing or non-condensing?

We recommend that, if possible, you select one of the very latest condensing oil boilers on the market like the Firebird Envirogreen Slimline Combi C35.

Condensing boilers are better for the environment because they capture and recycle the heat still present in flue exhaust gases and water vapour condensation for re-use, meaning lower greenhouse gas emissions.

They're also a lot cheaper to run meaning that, if you're replacing a very old and inefficient boiler, the savings on your oil bill over 5-10 years add up to more than you pay for the boiler itself.

Is the Firebird Envirogreen Slimline Combi C35 combi an energy-efficient boiler?

How we heat our homes and the damage we might be doing to the environment as a result has become an important point of concern to many homeowners worried about climate change.

As much as 14% of the UK’s greenhouse gas production derives from our domestic central heating systems. Gas boilers are responsible for dangerous levels of nitrogen dioxide emissions in Britain's largest cities.

Would installing the Firebird Envirogreen Slimline Combi C35 combi in your home be an environmentally friendly decision? Let's look closely at the figures.

All boilers manufactured after April 2018 in the UK must be rated as an “A” on the SEDBUK grading system, subject to a minimum energy efficiency rating of 92% or above. Before that, the minimum rate was 88% - boilers with an energy efficiency of 88% or 89% were given a “B” rating. Boilers scoring 90% or more were given an "A" rating.

The energy efficiency rating for a boiler describes the amount of energy it uses and how much goes to waste in operation.

The Firebird Envirogreen Slimline Combi C35 has an efficiency rating of 93% with a SEDBUK grade of "A".

The Energy Related Products Directive (ERP) came into force in 2015. This legislation was introduced to encourage manufacturers to create more energy-efficient products and it covers all products that consume energy during their lifetimes, including energy used during production and at the point of disposal.

ERP ratings of "A" for heat and "A" for water were assigned when testing the Firebird Envirogreen Slimline Combi C35.

How long is the warranty period on a Firebird Envirogreen Slimline Combi C35 combi boiler?

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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