Asked by: Vergelina Teyssier
home and garden indoor environmental quality

Are condensing boilers any good?

Last Updated: 14th April, 2020

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The main reason why condensing boilers are better than non-condensing models is that they are at least 25% more efficient. By reaching up to 99% efficiency, condensing boilers can help you lower your fuel bills significantly and reduce your carbon footprint, making them a great alternative heating system.

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Also, which is the most reliable condensing boiler?

Best Condensing Boiler 2020

  • Viessmann Vitodens 200-W. Energy Efficiency: 98% Approx.
  • ATAG iC Economiser Plus 35. Energy Efficiency: 94%
  • Viessmann Vitodens 100-W. Energy Efficiency: 92% to 94%
  • Vaillant ecoTEC exclusive with Green iQ combi. Energy Efficiency: 90% to 92%
  • Viessmann Vitodens 050-W. Energy Efficiency: 89% to 90%

Similarly, what are the benefits of a condensing boiler? There are two main benefits to gain from using a condensing boiler: lower energy bills, and a reduced carbon footprint. As condensing boilers are so much more efficient than their conventional counterparts when turning fuel into usable heat, less fuel is required overall to heat both your water and your home.

is a condensing boiler better than a combi?

Condensing boilers are probably the most energy-efficient boilers currently available on the market. The reason they're so efficient is because they condense water vapour in the exhaust gases. They weigh a lot more than a standard (and much more than a combi) boiler.

How long do condensing boilers last?

Boilers should last up to 15 years. If yours is approaching that age, then think about saving for a new one. If you want to keep your boiler in tip-top condition for longer, annual services are the way to go. They help to keep your boilers efficient and lower the risk of malfunctions.

Related Question Answers

Tita Mollenberg

Professional

Which boiler is better Vaillant or Worcester?

Both appliances have been given an A rating, which makes them both highly efficient with the highest attainable rating. In this category in particular, the Worcester Bosch boiler has the edge over the Vaillant boiler at 93% energy efficiency. The Worcester Bosch boiler takes a point over the Vaillant!

Lorri Bianca

Professional

Which is the most reliable boiler?

The Best Combi, Regular & System Boilers
  • #1 – Worcester Bosch.
  • #2 – Ideal Boilers.
  • #3 – Vaillant.
  • #4 – Potterton.
  • #5 – Baxi.
  • #6 – Glow Worm.

Ezio El Issaoui

Professional

Which is the best 2019 boiler?

Best Combi Boilers 2019 UK – Gas/LPG
  1. Viessmann Vitodens 200-W. When it comes to best combi boilers 2019, this boiler is the undisputed king.
  2. Viessmann Vitodens 100-W.
  3. ATAG iC Economiser Plus.
  4. Vaillant ecoTEC Plus Combi.
  5. Worcester Bosch Greenstar CDi Classic.
  6. Viessmann Vitodens 050-W.

Asenet Janning

Explainer

Do condensing boilers need a water tank?

Advantages of a Condensing Boiler
It recycles waste gases and saves on your future energy bills. Space savings: a condensing combi boiler does not need a hot water tank and is available in a wide range of compact sizes, making it much suitable and convenient to fit in a kitchen cupboard than conventional boiler models.

Enai Ben Moussa

Explainer

What size condensing boiler do I need?

As a rough estimate most flats, apartments and smaller houses, with up to 10, average size radiators and 1 bathroom* will require a 24 to 27kw Combi Boiler. For a medium to large 3-4 bedroom house with up to 15 average size radiators, 1 bathroom and an ensuite* bathroom, a 28-34kw Combi Boiler would be installed.

Nauset Kromberg

Explainer

What type of boiler should I choose?

Combi boilers – Britain's best-selling type of boiler, as they are compact and quick to install – provide heat for your radiators and hot running water on demand. They don't need a water storage cylinder and so take up less space, making them ideal for smaller properties.

Huc Derzhavets

Pundit

Are all new gas boilers condensing?

Simply put, the legislation states that: Gas-fired boilers, both new installations and replacement, have to be condensing. Oil-fired boilers, both new installations and replacements, have to be condensing. All condensing boilers that are installed need to have an efficiency rating no lower than B.

Lowell Asta

Pundit

What is the best boiler for a 4 bedroom house?

To help you select a suitable boiler for your 4 bed home, here are some of our recommendations:
  • Worcester Bosch Greenstar 24Ri Heat-only.
  • Ideal Logic Heat H30 Heat-only.
  • Ideal Vogue C40 Combi.
  • Intergas Xclusive 36kW Combi.
  • Intergas Eco RF 36kW Heat-only.
  • Vaillant EcoTec Exclusive 835 Combi.

Nogaye Blanch

Pundit

Can you still buy non condensing boilers?

Fitting a non-condensing boiler
If the following criteria are met, it is legal and acceptable to install a non condensing oil boiler as a replacement in an existing domestic dwelling. If the points scored are over 1000 then it is acceptable to fit a non condensing boiler.

Xiuping Koumanidis

Pundit

What are the pros and cons of a combi boiler?

The Pros and Cons of Combi Boilers
  • More Efficient. Combi boilers are highly efficient when compared to older boiler models.
  • Cheaper.
  • Faster.
  • More Compact.
  • Safer.
  • Easier to Sell.
  • Less Likely to Suffer from Pressure Issues.
  • Cleaner.

Nicoll Debes

Pundit

Can you use a combi boiler with a Megaflow?

Megaflo & Combi Boiler Comparison
Combi boilers heat hot water on demand, and they have no water storage facility. So, even huge combi boilers like the 42CDI from Worcester, will struggle to keep up with hot water demand in large properties. And, that's where a cylinder combined with a “system” boiler comes in.

Mika Plogstert

Teacher

Omaida Pollauf

Teacher

What is difference between Combi and condensing boilers?

Condensing or Combi Boiler. Sealed System boilers are newer, and just have a cylinder for DHW (domestic hot water) storage. Along with modern combi boilers, all modern Open Vent and Sealed System boilers are also condensing boilers. Just to make it really simple, ALL boilers manufactured in 2018 are condensing boilers.

Stanciu Oller

Teacher

Is a combi boiler cheaper to run than a conventional boiler?

Anyway, a conventional boiler running water to a hot water tank is not much more expensive than a combi and can even be cheaper.

Hildelisa Latham

Teacher

How efficient are condensing boilers?

The main difference is that condensing boilers are up to 99% efficient while non-condensing boiler are only up to 78% efficient. This means that condensing boilers help you save up to £310 per year on gas bills while also reducing your household emissions.

Kaleem Arcarazo

Reviewer

What is the alternative to a combi boiler?

2: Solar thermal panels. Solar thermal panels are worth considering as a gas boiler alternative. These eco-friendly systems absorb heat from the sun in solar collectors, which are fitted to your roof. The heated fluid is then transferred to your hot water tank, where it's ready to use.

Onia Cencerrado

Reviewer

How much is a Viessmann combi boiler?

Viessmann Combi Boilers Price Range – Highly Efficient Boilers
COMBI GAS BOILER SERIES SIZES PRICE
Viessmann Vitodens 111-W DHW Storage Combi 26 – 35kW £1,518 – £1,632
Viessmann Vitodens 222-F Combi 19 – 35kW £2,474 – £2,606
Viessmann Vitodens 242-F Combi 18 – 26kW £5,985 – £6,188

Kamrul Ventayol

Reviewer

What temperature should a condensing boiler be set at?

You should set the temperature between 60 and 65 °C but for maximum efficiency, it should be set to around 60 °C. Do not set it lower than this as you could increase the risk of contracting Legionnaires' disease.

Ismene Noir

Reviewer

How do you tell if you have a condensing boiler?

You could check your boiler manual for reference to condensing or 'HE' in the title. Check the flue terminal which is usually sticking out through an external wall near the boiler. If it is plastic and white steam comes out of it when the boiler is on then it is likely to be a condensing boiler.