Vaillant vs Viessmann
Average Price
£1,450
Vaillant
£1,550
Viessmann
Energy Efficiency
94.7%
Vaillant
95.7%
Viessmann
Warranty
9.8 years
Vaillant
10.2 years
Viessmann
Customer Rating
4.5/5
Vaillant
4.7/5
Viessmann
Detailed Comparison
Vaillant
Viessmann
Average Price
£1,450
£1,550
Energy Efficiency
94.7%
95.7%
Average Warranty
9.8 years
10.2 years
Reliability Score
4.6/5
4.8/5
Customer Satisfaction
4.5/5
4.7/5
UK Market Share
18.9%
11.2%
Established
1874
1917
Country of Origin
Germany
Germany
Smart Controls Compatible
High Efficiency Models
Extended Warranty Options
Popular Boiler Models
Vaillant Popular Models
| Model | Type | Efficiency | Price |
|---|---|---|---|
| ecoFIT pure | Combi | 93.0% | £950 |
| ecoTEC pro | Combi | 93.0% | £1,100 |
| ecoTEC plus | Combi | 94.0% | £1,300 |
| ecoTEC Plus LPG | Combi | 94.0% | £1,350 |
| ecoTEC exclusive | System | 97.0% | £1,800 |
Viessmann Popular Models
| Model | Type | Efficiency | Price |
|---|---|---|---|
| Vitodens 050 | Combi | 93.0% | £950 |
| Vitodens 100W Open Vent | Regular | 94.0% | £1,000 |
| Vitodens 200 | System | 98.0% | £1,900 |
Approved Installers
Vaillant Installers
BOXT
4.8
Premium Partner
E.ON
4.0
Advanced Installer
Viessmann Installers
BOXT
4.8
Premium Partner
Hometree
4.6
Certified Partner
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