Head to head
Baxi 800 Combi 2 36kW vs Telford Tempest 170 Direct
The Telford Tempest 170 Direct comes with 15 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Telford Tempest 170 Direct comes with 15 years more warranty.
Specifications side by side
| Baxi 800 Combi 2 36kW | Telford Tempest 170 Direct | |
|---|---|---|
| Dimensions | 700 x 390 x 285 mm | 1200 mm high x 510 mm diameter (approx.) |
| Weight | 29.5 kg | 40 kg empty, 208 kg full |
| Warranty | 10 years | Lifetime guarantee on the cylinder (25 years internal), 2 years on components |
| Hot water output | 36 kW | - |
| Central heating output | 26.4 kW | - |
| ErP class | A | - |
| Seasonal efficiency | 93% | - |
| Hot water flow rate | 15 litres per minute | - |
| Capacity | - | 170 litres |
| Immersion heater | - | 2 x 3kW, 240V single phase |
| Max inlet pressure | - | 3 bar (inlet control group) |
Sources: Baxi 800 Combi 2 36kW, Telford Tempest 170 Direct. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the 800 Combi 2 36kW if...
A gas combi boiler with 36 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 15 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years. Seasonal efficiency is 93%.
Full 800 Combi 2 36kW specifications →Buy or hire the Tempest 170 Direct if...
- you want one that comes with 15 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 800 Combi 2 36kW and the Telford Tempest 170 Direct?
The Telford Tempest 170 Direct comes with 15 years more warranty. The Baxi 800 Combi 2 36kW is a gas combi boiler, 36 kW hot water output; the Telford Tempest 170 Direct is a direct unvented hot water cylinder, 170 litres.
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