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Baxi 800 825 boiler

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  2. Baxi 800 825
Plumbproud rating

87.46%

Baxi 800 825 Combi Gas boiler

Using the PlumbProud boiler quality scoring system, we have rated this model at 87.46%. To determine the rating, we factor in the price installed, energy efficiency, running costs, the warranty offered, and more.

We anticipate the supply and installation cost for this model of boiler will be around £2,000 on a standard fit.

For professional advice on whether the Baxi 800 825 is the right boiler for your home or to receive a free quotation, please call 01604 343053 to speak to our friendly team. You are also welcome to email us by clicking here or you can enter your postcode into the quotation box on this page.


Installed price around

£2,000

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Baxi 800 825 Combi Gas boiler frequently asked questions

Baxi 800 825 - combi, system or regular boiler?

The Baxi 800 825 is a gas combi boiler.

Combination or combi boilers are highly efficient and save a lot of space in your home. Combi boilers heat water directly from the mains when you turn on a tap and, as a result, you don’t need a hot water storage cylinder or a cold water tank in the roof space.

These boilers are, therefore, suitable for smaller homes and especially those without a loft. They are also cost-effective as the water is heated instantly and distributed on demand rather than being stored. Combi boilers are the most popular type of boilers in the UK and replacing an older boiler with a new combi boiler will reduce your gas bills significantly.

However, there are downsides to this type of boiler. If you take a shower while someone else is using a tap, less water will reach each point of usage at lower rates of pressure and temperatures as combi boilers can only heat a certain volume of water at any given time.

Is a Baxi 800 825 combi boiler suitable for my apartment or house?

You should make sure that the boiler you install in your property is the right "size". And size doesn't mean its physical dimensions, size means how much power it has - the "output".

Output measures in kilowatts how much power a boiler can use when heating water for your radiators or taps. The higher the output rate, the more water it can heat.

If the output rate is too low, your hot water might often be only lukewarm, and if it is too high, you will be paying more for your gas than you need to.

The Baxi 800 825 combi boiler has an output of 25 kW, so which types of property would it be most appropriate for?

A PlumbProud boiler engineer would recommend that this Baxi 800 825 Combi boiler is suitable for smaller homes and apartments with up to 10 radiators and one bathroom.

With combi boilers like the Baxi 800 825, you need to take the flow rate into account as well as the output rate.

Combi boilers draw water from the mains and then instantly heat that water and send it to wherever in your home it's needed. Flow rates, measured in litres per minute, are subject to the mains water pressure in your area. So, for example, if the local mains water pressure is 11 litres per minute and the flow rate of your boiler is 14 litres per minute, the boiler will not be able to process more than 11 litres per minute. The flow rate of this Baxi 800 825 Combi boiler is 10 L/m.

If you live in a home with lots of radiators or bathrooms where many people want to use hot water at the same time, a combi boiler may not be able to cope. For reference, a power shower uses about 10 litres of water per minute. If two people want showers at the same time or one person wants a shower and the other hot water from a tap in the kitchen, your boiler may not have a large enough flow rate even if the local mains water pressure is high.

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.


Baxi 800 825 - size in millimetres

The Baxi 800 825 is 700 mm tall, 390 mm wide, and 285 mm deep.

Is the Baxi 800 825 condensing or non-condensing?

We recommend that, if possible, you select one of the very latest condensing gas boilers on the market like the Baxi 800 825.

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 gas bill over 5-10 years add up to more than you pay for the boiler itself.

Is the Baxi 800 825 combi boiler environmentally friendly?

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.

14% of the total amount of greenhouse gases produced by the UK comes from the central heating systems we use. In some of Britain's biggest cities, gas boilers create dangerous levels of nitrogen dioxide in the atmosphere.

Would the environmental impact of installing a Baxi 800 825 combi in your home be positive? Let's look at the numbers.

In the UK, by law, all boilers manufactured since April 2018 must have a SEDBUK “A” rating and operate to a minimum level of 92% energy efficiency. Prior to this, the minimum was 88% – 88/89% would score a "B" and 90% or more an "A" on the SEDBUK scale.

The energy efficiency rating measures the amount of energy a boiler consumes when it's in use and how much it loses on non-core operations.

Following testing, the Baxi 800 825 was given an efficiency rating of 93% and a SEDBUK grading of "A".

The aim of the Energy Related Products (ERP) Directive is to reduce the harmful gas emissions created during a product’s manufacture and active end use right through to its disposal.

The ERP rating for the Baxi 800 825 is "A" for heat and "A" for water.

What is the length of the warranty on the Baxi 800 825?

The Baxi 800 825 boiler offers a parts and labour warranty of 10 years.


Baxi 800 825 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?No
P/L Warranty10 Years
Output in kW25 kW
Height700 mm
Width390 mm
Depth285 mm
MountingWall
Flow rate10 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

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Baxi 800 825 boiler

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Baxi 800 825 Combi Gas boiler

  1. Home
  2. Baxi 800 825
Plumbproud rating for this boiler
87.46%

Using the PlumbProud boiler quality scoring system, we have rated this model at 87.46%. To determine the rating, we factor in the price installed, energy efficiency, running costs, the warranty offered, and more.

Expect this Baxi 800 825 Combi boiler to cost you £2,000 fully installed where there are no complications on the fit if you choose PlumbProud for this installation.

Enter your postcode in the box provided and receive a free quote for the Baxi 800 825 boiler for your home. We are also happy to answer any questions you might have about any of our boilers. You can do this by emailing the team or calling us today on 01604 343053.


Installed price guideline
£2,000

Get your free quote

Baxi 800 825 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Condensing?Yes
Efficiency rating93%
Band ratingA
LPG Compatible?No
P/L Warranty10 Years
Output in kW25 kW
Height700 mm
Width390 mm
Depth285 mm
MountingWall
Flow rate10 L/m
ERP HeatA
ERP WaterA

Baxi 800 825 Combi Gas boiler frequently asked questions

What type of boiler is Baxi’s 800 825 - system, regular or combi?

The Baxi 800 825 is a combi boiler you may wish to consider if you want this type of boiler for your house or flat.

Traditional boilers often have up to two tanks that either store heated water or water to be heated later. Boiler manufacturers introduced combi boilers in the 1970s to avoid the need for those big tanks. Combi boilers allow homeowners to benefit from the reliable central heating and hot water level they want but without having to give up so much space within their properties - remember that homes in the UK are among the smallest in the developed world.

Your taps and radiators get the hot water they need with a combi boiler. Combi boilers draw cold water direct from the mains which is then heated instantly on demand and distributed to your radiators and taps.

However, combi boilers cannot heat very large volumes of water, which is their main disadvantage. So, for example, when someone wants to take a shower while another person wants to use a hot water tap to do the dishes, water pressure and quantity to both points decreases.

Should I choose a Baxi 800 825 combi boiler for my house or flat?

You should make sure that the boiler you install in your property is the right "size". And size doesn't mean its physical dimensions, size means how much power it has - the "output".

Your boiler should be able to cope with peak hot water demand in your property and not just your average hot water usage. The output rate of a boiler is measured in kilowatts and tells you how much power a boiler can use to provide hot water to your taps, showers and radiators.

If the output of your boiler is too low, there will often be times when your water isn't as hot as you want. But if your boiler output is too high, it will be more costly to run (often unnecessarily).

The output of the Baxi 800 825 combi boiler is 25 kW kilowatts. Which types of property would this be appropriate for?

Most heating engineers would suggest that the Baxi 800 825 combi boiler would be a suitable choice for installation in smaller homes and apartments with up to 10 radiators and one bathroom.

If you are thinking about installing a combi boiler like the Baxi 800 825 in your home, you should consider flow rates as well as output rates. This Baxi 800 825 Combi boiler's flow rate is 10 L/m.

The flow rate indicates the maximum volume of water (measured in litres per minute) that your boiler can heat up and send to your radiators, taps and showers at any one time. The more taps and showers that could be in use simultaneously or the greater the number of radiators you have, the higher the flow rate you need.

However, you should establish what the mains pressure is at your property as a combi boiler can only heat the water that comes into your home.

For example, 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 capacity. Typically, a power shower will require 10 litres of water per minute.

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.


What are the dimensions of the Baxi 800 825 boiler?

The Baxi 800 825 boiler is 700 mm high, 390 mm wide, and 285 mm deep.

Is the Baxi 800 825 a condensing or non-condensing boiler?

We recommend that, if possible, you select one of the very latest condensing gas boilers on the market like the Baxi 800 825.

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 gas bill over 5-10 years add up to more than you pay for the boiler itself.

Is the Baxi 800 825 combi boiler good for the environment?

Price and performance are two important issues when choosing a boiler but now, for many people in the UK, so is the environmental impact of how we heat our homes and its effect on climate change.

With central heating being responsible for 14% of greenhouse gas emissions in the UK, your choice of boiler matters. Gas boilers are also responsible for the significant atmospheric volumes of dangerous nitrogen dioxide emissions in larger British cities.

Would choosing a Baxi 800 825 combi help in the fight against climate change? What do the performance statistics suggest?

All boilers manufactured and supplied in the UK are assigned two energy efficiency ratings. By law, they must achieve a SEDBUK "A" rating subject to a minimum efficiency level of 92%. Prior to that, the minimum was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90% and above an "A" grade).

The ratings awarded to the Baxi 800 825 are 93% with a SEDBUK rating of "A".

The ERP (or Energy Related Products Directive) is European legislation affecting products that consume energy throughout their lifetime.

The aim is to encourage companies to create environmentally friendlier products that reduce harmful gas emissions during manufacturing and when in use by the end client, right through to their eventual disposal.

In the case of the Baxi 800 825, the ERP rating is "A" for heat and "A" for hot water production.

How long is the warranty offered by the manufacturer for the Baxi 800 825 boiler?

The Baxi 800 825 is supplied with a parts and labour warranty of 10 years.


The top 10 rated Gas Combi boilers

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

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
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