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Boiler installations

Vaillant Boiler Reviews

Our Reviews of Vaillant boilers

Whether you're looking to upgrade or just looking for advice on your current boiler you can see reviews by our expert staff below.

Vaillant ecoTEC exclusive with Green IQ

Vaillant ecoTEC exclusive with Green IQ

Combination boiler: ecoTEC exclusive 835, ecoTEC exclusive 843
System boiler: ecoTEC exclusive 627

Power rating options (hot water): 35kw to 43kw.
Central heating: 27 to (36kw for 843 combi)
Hot water performance: combi option: 14.5 to 17.8 l/min

Standard manufactures guarantee: 5 years
Standard manufactures guarantee when installed by PDL: 8 years – 10 years available

ERP: A 94%
Price range: £1390 - £1925
This is the price of the boiler only, you will also need a flue (horizontal or vertical depending on location of boiler), controls and installation.
Do we recommend: Yes
Do we fit: Yes

This is Vaillant’s top of the range boiler.

Pro’s

Extra condense heat exchanger and a Modulation range of 1:10 is something no other boiler can boast. The combi boiler comes in a 35 and 43kw option that gives a staggering hot water performance. This boiler is the “money is no obstacle” choice for people who just want the best for mid-size and larger homes. 94% ERP rating when combined with a Vaillant weather compensator or V smart giving an extra 4% efficiency then really it is hard to see how this boiler can be improved on.

Con’s

Its exclusive but expensive! If you have a low consumption of hot water this boiler is not needed. Only available in 27kw system boiler option – this will comfortably power a large property, however there are some very large homes for which this is not enough and would have to go for the plus which has a 37kw option.

Opinion

WOW, amazing boiler, if you want the best look no further. Would give it 10/10 if it wasn’t so expensive.

Overall rating 9/10
Vaillant ecoTEC plus

Vaillant ecoTEC plus

Combination boiler: ecoTEC plus 825, ecoTEC plus 832, ecoTEC plus 835, ecoTEC plus 838
System boiler: ecoTEC plus 612, ecoTEC plus 615, ecoTEC plus 618, ecoTEC plus 624, ecoTEC plus 630, ecoTEC plus 637
Open Vent boiler: ecoTEC plus 412, ecoTEC plus 415, ecoTEC plus 418, ecoTEC plus 424, ecoTEC plus 430, ecoTEC plus 438

Power rating options (hot water): 25kw to 38kw.
Central heating: 12kw to 38kw
Hot water performance: combi option : 10.5 to 15.9 l/min

Standard manufactures guarantee: 5 years
Standard manufactures guarantee when installed by PDL: 8 years – 10 years available

ERP: A
Price range: £863 - £1412
This is the price of the boiler only, you will also need a flue (horizontal or vertical depending on location of boiler), controls and installation.
Do we recommend: Yes
Do we fit: Yes, for combi and system boiler but no for open vent unless system is converted to sealed.
Why? Central heating systems remain clean better when they are sealed, this is better for reliability and efficiency.

This is Vaillant’s widest range boiler which has models to fit almost every possible property.

Pro’s

This is a wonderful, reliable boiler giving efficiency, performance and reliability. With a stainless-steel heat exchanger and has been designed and built with a very long life in mind. It is compatible with Vaillant’s ebus controls and weather compensating controls giving a further increase efficiency by 4%. Modulation range of 1:6, it has won Which? Best buy and is very quiet. This boiler is good for small, mid-size and larger homes, however for small homes with a combi boiler and low hot water consumption might be better served saving some money and going for the pro.

Con’s

Very hard to fault.
Cost - however it does give long term value for money
It does not fit in a standard kitchen cupboard.
It is not possible to fit pipework behind the boiler without fitting a frame (this cost a little extra and makes the boiler deeper).

Opinion

Love it, fantastic boiler, just wish it was a little cheaper.

Overall rating 9/10
Vaillant ecoTEC pro combination

Vaillant ecoTEC pro combination

Range: pro24, pro28 and pro30

Power rating options (hot water): 24kw, 28kw and 30kw.
Hot water performance: 9.6 to 12.3 l/min

Standard manufactures guarantee: 2 years
Standard manufactures guarantee when installed by PDL: 6 years – 10 years available

ERP: A
Price range: £898 - £1075
This is the price of the boiler only, you will also need a flue (horizontal or vertical depending on location of boiler), controls and installation.
Do we recommend: Yes
Do we fit: Yes, This is Vaillant’s combi boiler aimed at small to medium size properties.

Pro’s

This is a fantastic, reliable bullet proof boiler giving excellent performance and reliability. It contains stainless steel heat exchanger and has been very well designed with a very long life in mind. It is compatible with Vaillant’s ebus controls including weather compensating controls and V Smart which both increase efficiency by 4%. It has a modulation range of 1:4, has won Which? Best buy and quiet mark. This boiler is perfect for small and mid-size homes, ideally with one hot water draw at a time. If you have 2 bathrooms which are likely to be used at the same time you will need a more powerful boiler or an unvented cylinder.

Con’s

Not many.
It does not fit in a standard kitchen cupboard.
It is not possible to fit pipework behind the boiler without fitting a frame (this cost a little extra and makes the boiler deeper).
It’s not available in very high-powered options.

Opinion

Can’t go wrong with this option if you don’t need massive hot water performance. If so go for the plus or exclusive.

Overall rating 9/10
Vaillant ecoFIT Pures

Vaillant ecoFIT Pure

Combination boiler: ecoTEC pure 825, 830, 835
System boiler: ecoTEC pure 612, 615, 618, 624, 630
Open Vent boiler: ecoTEC pure 412, 415, 418, 424, 430, 435

Power rating options (hot water): 25kw to 35kw.
Central heating: 12kw to 35kw
Hot water performance: combi option : 10.4 to 14.4 l/min

Standard manufactures guarantee: 5 years
Standard manufactures guarantee when installed by PDL: 7 years – 10 years available

ERP: A
Price range: £748 - £1094
This is the price of the boiler only, you will also need a flue (horizontal or vertical depending on location of boiler), controls and installation.
Do we recommend: Yes (only if space is limited)
Do we fit: Yes, but only is space is limited.
Why? Central heating systems remain clean better when they are sealed, this is better for reliability and efficiency.

This is Vaillant’s kitchen cupboard fit boiler.

Pro’s

It fits in a standard kitchen cupboard, it has been very cleverly designed with rear flue option which makes it a very versatile option. It is at least the equal of any boiler restrained by the size limitations of designing a boiler that will fit in a standard cupboard. Really is amazing that they have managed to pack so much power into such a small package.

Con’s

Only fits in a kitchen cupboard if you don’t need to run pipes behind the boiler, this can be a big negative as often pipes will drop from above, if so Worcester cdi compact would be a better choice. If you have space for the pro, plus or exclusive then they are all better boilers.

Opinion

Whilst you have to admire the achievement of fitting all that performance into such a small space it has come at a cost. This boiler does not feel like the rest of the Vaillant range, lots of composite and aluminium has been used to achieve the smaller size. If you really have no choice with regards to cupboard space then it is a good boiler, but if it is possible to fit a larger boiler that would be my recommendation.

Overall rating 6/10

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