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Best Gas Combi Boilers

Best Gas Combi Boilers

The best gas combi boilers on the market


1. Vaillant ecoTEC Plus 825

Our score rating: 93.35%

Efficiency rating
94%
Band rating
A
Output in kW
25.4 kW
Height
720 mm
Width
440 mm
Depth
338 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,300

2. Vaillant ecoTEC Plus 832

Our score rating: 92.98%

Efficiency rating
94%
Band rating
A
Output in kW
31.8 kW
Height
720 mm
Width
440 mm
Depth
338 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,300

3. Worcester Bosch Greenstar 2000 25kW

Our score rating: 92.89%

Efficiency rating
93%
Band rating
A
Output in kW
25 kW
Height
724 mm
Width
400 mm
Depth
300 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £1,800

4. Viessmann Vitodens 050-W 29kW

Our score rating: 92.66%

Efficiency rating
93%
Band rating
A
Output in kW
29 kW
Height
707 mm
Width
400 mm
Depth
350 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £1,800

5. Vaillant ecoTEC Plus 835

Our score rating: 92.60%

Efficiency rating
94%
Band rating
A
Output in kW
35 kW
Height
720 mm
Width
440 mm
Depth
372 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,400

6. Worcester Bosch Greenstar CDi Compact 28

Our score rating: 92.57%

Efficiency rating
90.5%
Band rating
A
Output in kW
28 kW
Height
680 mm
Width
390 mm
Depth
280 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,000

7. Vaillant ecoFIT Pure 825

Our score rating: 92.39%

Efficiency rating
94%
Band rating
A
Output in kW
25 kW
Height
700 mm
Width
390 mm
Depth
295 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,000

8. Vaillant ecoTEC Plus 838

Our score rating: 92.16%

Efficiency rating
94%
Band rating
A
Output in kW
38.7 kW
Height
720 mm
Width
440 mm
Depth
406 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,500

9. Vaillant ecoTEC Exclusive IQ 835

Our score rating: 91.90%

Efficiency rating
94%
Band rating
A
Output in kW
35 kW
Height
720 mm
Width
440 mm
Depth
406 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,600

10. Vaillant ecoTEC Pro 24

Our score rating: 91.77%

Efficiency rating
94%
Band rating
A
Output in kW
23.4 kW
Height
720 mm
Width
440 mm
Depth
338 mm
Mounting
Wall
Fuel
Gas
ERP Rating
A

Supply and installation around £2,000

Other gas combi boilers to consider

Range and model Rating Estimated price
Worcester Bosch Greenstar Si Compact 25Si 91.77% £2,100
Worcester Bosch Greenstar 8000 Life 30kW 91.66% £2,200
Worcester Bosch Greenstar CDi Compact 32 91.56% £2,100
Worcester Bosch Greenstar 2000 30kW 91.55% £1,900
Worcester Bosch Greenstar i 25i 91.48% £2,100
Vaillant ecoTEC Plus 938 91.46% £2,700
Worcester Bosch Greenstar 4000 25kW 91.41% £2,100
Viessmann Vitodens 050-W 35kW 91.23% £1,900
Worcester Bosch Greenstar 8000 Style 30kW 91.18% £2,300
Vaillant ecoFIT Pure 830 91.05% £2,100
Worcester Bosch Greenstar Si Compact 25Si
PP Score 91.77% Est price

£2,100

Worcester Bosch Greenstar 8000 Life 30kW
PP Score 91.66% Est price

£2,200

Worcester Bosch Greenstar CDi Compact 32
PP Score 91.56% Est price

£2,100

Worcester Bosch Greenstar 2000 30kW
PP Score 91.55% Est price

£1,900

Worcester Bosch Greenstar i 25i
PP Score 91.48% Est price

£2,100

Vaillant ecoTEC Plus 938
PP Score 91.46% Est price

£2,700

Worcester Bosch Greenstar 4000 25kW
PP Score 91.41% Est price

£2,100

Viessmann Vitodens 050-W 35kW
PP Score 91.23% Est price

£1,900

Worcester Bosch Greenstar 8000 Style 30kW
PP Score 91.18% Est price

£2,300

Vaillant ecoFIT Pure 830
PP Score 91.05% Est price

£2,100

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    The best gas combi boilers on the market

    1. Vaillant ecoTEC Plus 825

    Our score rating: 93.35%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    25.4 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    338 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,300

    2. Vaillant ecoTEC Plus 832

    Our score rating: 92.98%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    31.8 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    338 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,300

    3. Worcester Bosch Greenstar 2000 25kW

    Our score rating: 92.89%

    Efficiency rating
    93%
    Band rating
    A
    Output in kW
    25 kW
    Height
    724 mm
    Width
    400 mm
    Depth
    300 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £1,800

    4. Viessmann Vitodens 050-W 29kW

    Our score rating: 92.66%

    Efficiency rating
    93%
    Band rating
    A
    Output in kW
    29 kW
    Height
    707 mm
    Width
    400 mm
    Depth
    350 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £1,800

    5. Vaillant ecoTEC Plus 835

    Our score rating: 92.60%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    35 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    372 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,400

    6. Worcester Bosch Greenstar CDi Compact 28

    Our score rating: 92.57%

    Efficiency rating
    90.5%
    Band rating
    A
    Output in kW
    28 kW
    Height
    680 mm
    Width
    390 mm
    Depth
    280 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,000

    7. Vaillant ecoFIT Pure 825

    Our score rating: 92.39%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    25 kW
    Height
    700 mm
    Width
    390 mm
    Depth
    295 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,000

    8. Vaillant ecoTEC Plus 838

    Our score rating: 92.16%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    38.7 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    406 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,500

    9. Vaillant ecoTEC Exclusive IQ 835

    Our score rating: 91.90%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    35 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    406 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,600

    10. Vaillant ecoTEC Pro 24

    Our score rating: 91.77%

    Efficiency rating
    94%
    Band rating
    A
    Output in kW
    23.4 kW
    Height
    720 mm
    Width
    440 mm
    Depth
    338 mm
    Mounting
    Wall
    Fuel
    Gas
    ERP Rating
    A

    Supply and installation around £2,000

    Other gas combi boilers to consider

    Range and model Rating Estimated price
    Worcester Bosch Greenstar Si Compact 25Si 91.77% £2,100
    Worcester Bosch Greenstar 8000 Life 30kW 91.66% £2,200
    Worcester Bosch Greenstar CDi Compact 32 91.56% £2,100
    Worcester Bosch Greenstar 2000 30kW 91.55% £1,900
    Worcester Bosch Greenstar i 25i 91.48% £2,100
    Vaillant ecoTEC Plus 938 91.46% £2,700
    Worcester Bosch Greenstar 4000 25kW 91.41% £2,100
    Viessmann Vitodens 050-W 35kW 91.23% £1,900
    Worcester Bosch Greenstar 8000 Style 30kW 91.18% £2,300
    Vaillant ecoFIT Pure 830 91.05% £2,100
    Worcester Bosch Greenstar Si Compact 25Si
    PP Score 91.77% Est price

    £2,100

    Worcester Bosch Greenstar 8000 Life 30kW
    PP Score 91.66% Est price

    £2,200

    Worcester Bosch Greenstar CDi Compact 32
    PP Score 91.56% Est price

    £2,100

    Worcester Bosch Greenstar 2000 30kW
    PP Score 91.55% Est price

    £1,900

    Worcester Bosch Greenstar i 25i
    PP Score 91.48% Est price

    £2,100

    Vaillant ecoTEC Plus 938
    PP Score 91.46% Est price

    £2,700

    Worcester Bosch Greenstar 4000 25kW
    PP Score 91.41% Est price

    £2,100

    Viessmann Vitodens 050-W 35kW
    PP Score 91.23% Est price

    £1,900

    Worcester Bosch Greenstar 8000 Style 30kW
    PP Score 91.18% Est price

    £2,300

    Vaillant ecoFIT Pure 830
    PP Score 91.05% Est price

    £2,100

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