Head to head
Ideal Heating Logic Max Combi C24 24kW vs Vaillant ecoFIT pure 825 25kW combi
The Ideal Heating Logic Max Combi C24 24kW puts out 5kW more to the radiators. The Vaillant ecoFIT pure 825 25kW combi runs 0.5 litres a minute more hot water and has 1kW more hot water output.
Last reviewed 13 September 2026
Key differences
- Central heating output: the Ideal Heating Logic Max Combi C24 24kW puts out 5kW more to the radiators.
- Hot water flow rate: the Vaillant ecoFIT pure 825 25kW combi runs 0.5 litres a minute more hot water.
- Hot water output: the Vaillant ecoFIT pure 825 25kW combi has 1kW more hot water output.
Specifications side by side
| Ideal Heating Logic Max Combi C24 24kW | Vaillant ecoFIT pure 825 25kW combi | |
|---|---|---|
| Hot water output | 24.2 kW | 25.2 kW |
| Central heating output | 24.2 kW | 19.1 kW |
| ErP class | A | A |
| Seasonal efficiency | 94% | 94% |
| Dimensions | 700 x 395 x 278 mm | 700 x 390 x 295 mm |
| Warranty | 10 years | 10 years when installed by Vaillant Advance installer |
| Hot water flow rate | 9.9 litres per minute | 10.4 litres per minute |
| Weight | - | 32 kg |
Sources: Ideal Heating Logic Max Combi C24 24kW, Vaillant ecoFIT pure 825 25kW combi. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Logic Max Combi C24 24kW if...
- you want one that puts out 5kW more to the radiators
A gas combi boiler with 24.2 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 9.9 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years. Seasonal efficiency is 94%.
Full Logic Max Combi C24 24kW specifications →Buy or hire the ecoFIT pure 825 25kW combi if...
- you want one that runs 0.5 litres a minute more hot water
- you want one that has 1kW more hot water output
A gas combi boiler with 25.2 kW of hot water output, sized for a flat or small house with one bathroom. It delivers about 10.4 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years when installed by Vaillant Advance installer. Seasonal efficiency is 94%.
Full ecoFIT pure 825 25kW combi specifications →Common questions
What is the difference between the Ideal Heating Logic Max Combi C24 24kW and the Vaillant ecoFIT pure 825 25kW combi?
The Ideal Heating Logic Max Combi C24 24kW puts out 5kW more to the radiators. The Vaillant ecoFIT pure 825 25kW combi runs 0.5 litres a minute more hot water and has 1kW more hot water output. The Ideal Heating Logic Max Combi C24 24kW is a gas combi boiler, 24.2 kW hot water output; the Vaillant ecoFIT pure 825 25kW combi is a gas combi boiler, 25.2 kW hot water output.
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