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
Vaillant vs Viessmann: Summary
When comparing Vaillant and Viessmann boilers, several key differences emerge. Vaillant, established in 1874, offers boilers with an average efficiency of 94.7% at an average price of £1,450. Meanwhile, Viessmann boilers average 95.7% efficiency at £1,550.
Vaillant boilers come with an average warranty of 9.8 years, compared to Viessmann's 10.2 years. Customer satisfaction ratings show Viessmann ahead at 4.7/5, while reliability scores give Viessmann a slight edge.
Both manufacturers offer smart control compatibility and produce boilers suitable for different property types. Both are based in Germany.
Detailed Comparison
Who Should Choose Vaillant
- Budget-conscious homeowners looking for great value
- Tech-savvy homeowners wanting smart home integration
- Homeowners looking for efficient combi boilers
Who Should Choose Viessmann
- Those wanting longer warranty coverage for peace of mind
- Homeowners valuing customer satisfaction and after-sales support
- Those planning to stay in their home long-term
- Homeowners wanting access to a wide network of approved installers
- Those looking for a boiler with exceptional reliability
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
Premium Partner
E.ON
Advanced Installer
Viessmann Installers
BOXT
Premium Partner
Hometree
Certified Partner
Efficiency & Running Costs
A more efficient boiler can significantly reduce your heating bills. Based on average UK gas prices and a typical 3-bedroom house:
Vaillant
Average Efficiency
94.7%
Estimated Annual Running Cost
£1,191
Based on average UK gas usage
Potential Annual Savings vs. Old Boiler (80% Efficient)
£186
Viessmann
Average Efficiency
95.7%
Estimated Annual Running Cost
£1,179
Based on average UK gas usage
Potential Annual Savings vs. Old Boiler (80% Efficient)
£197
Customer Reviews & Testimonials
Vaillant Owner Reviews
"Vaillant boilers offer excellent reliability. We've had ours for 3 years with no issues. The efficiency is great and it's quiet in operation."
John D. - ecoFIT pure Owner
"Installation was straightforward and the smart controls make it easy to manage heating. Customer service is responsive when needed."
Sarah T. - ecoTEC pro Owner
Viessmann Owner Reviews
"Viessmann boilers offer excellent reliability. We've had ours for 3 years with no issues. The efficiency is great and it's quiet in operation."
John D. - Vitodens 050 Owner
"Installation was straightforward and the smart controls make it easy to manage heating. Customer service is responsive when needed."
Sarah T. - Vitodens 100W Open Vent Owner
Frequently Asked Questions
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