Head to head
Ideal Heating Logic Max Combi C30 30kW vs Telford Tempest 300 Indirect
The Ideal Heating Logic Max Combi C30 30kW comes with 8 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Ideal Heating Logic Max Combi C30 30kW comes with 8 years more warranty.
Specifications side by side
| Ideal Heating Logic Max Combi C30 30kW | Telford Tempest 300 Indirect | |
|---|---|---|
| Dimensions | 700 x 395 x 278 mm | 1750 mm high x 580 mm diameter |
| Weight | 28.6 kg | 61 kg |
| Warranty | 10 years | Lifetime guarantee on the body with annual service, 2 year component guarantee |
| Hot water output | 30.3 kW | - |
| Central heating output | 25.6 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 94% | - |
| Hot water flow rate | 12.4 litres per minute | - |
| Capacity | - | 300 litres |
| Material | - | 2304 duplex stainless steel |
| Relief valve setting | - | 7 bar / 90C |
| Immersion heater | - | 3kW, 240V single phase, included |
Sources: Ideal Heating Logic Max Combi C30 30kW, Telford Tempest 300 Indirect. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Logic Max Combi C30 30kW if...
- you want one that comes with 8 years more warranty
A gas combi boiler with 30.3 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12.4 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 C30 30kW specifications →Buy or hire the Tempest 300 Indirect if...
A 300 litre indirect cylinder for a larger household or a property with high simultaneous hot water demand, part of Telford's Tempest range. Like the smaller direct model it carries a lifetime body guarantee when serviced annually.
Full Tempest 300 Indirect specifications →Common questions
What is the difference between the Ideal Heating Logic Max Combi C30 30kW and the Telford Tempest 300 Indirect?
The Ideal Heating Logic Max Combi C30 30kW comes with 8 years more warranty. The Ideal Heating Logic Max Combi C30 30kW is a gas combi boiler, 30.3 kW hot water output; the Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
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