Head to head
Baxi 600 Combi 2 30kW vs Telford Tempest 170 Direct
The Telford Tempest 170 Direct comes with 18 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Telford Tempest 170 Direct comes with 18 years more warranty.
Specifications side by side
| Baxi 600 Combi 2 30kW | Telford Tempest 170 Direct | |
|---|---|---|
| Dimensions | 700 x 395 x 297 mm | 1200 mm high x 510 mm diameter (approx.) |
| Warranty | 7 years | Lifetime guarantee on the cylinder (25 years internal), 2 years on components |
| Hot water output | 30.9 kW | - |
| Central heating output | 21.2 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 93% | - |
| Hot water flow rate | 12.2 litres per minute | - |
| Capacity | - | 170 litres |
| Weight | - | 40 kg empty, 208 kg full |
| Immersion heater | - | 2 x 3kW, 240V single phase |
| Max inlet pressure | - | 3 bar (inlet control group) |
Sources: Baxi 600 Combi 2 30kW, Telford Tempest 170 Direct. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the 600 Combi 2 30kW if...
A gas combi boiler with 30.9 kW of hot water output, sized for a three-bed house with one or two bathrooms. It delivers about 12.2 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 7 years. Seasonal efficiency is 93%.
Full 600 Combi 2 30kW specifications →Buy or hire the Tempest 170 Direct if...
- you want one that comes with 18 years more warranty
A 170 litre direct unvented cylinder from Telford's Tempest range, built in duplex stainless steel with twin 3kW immersions rather than a boiler coil. It suits an all-electric property, and the cylinder body carries a lifetime guarantee when serviced annually.
Full Tempest 170 Direct specifications →Common questions
What is the difference between the Baxi 600 Combi 2 30kW and the Telford Tempest 170 Direct?
The Telford Tempest 170 Direct comes with 18 years more warranty. The Baxi 600 Combi 2 30kW is a gas combi boiler, 30.9 kW hot water output; the Telford Tempest 170 Direct is a direct unvented hot water cylinder, 170 litres.
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