Head to head
Baxi 800 Combi 2 36kW vs Telford Tempest 300 Indirect
The Baxi 800 Combi 2 36kW comes with 8 years more warranty.
Last reviewed 13 September 2026
Key differences
- Warranty: the Baxi 800 Combi 2 36kW comes with 8 years more warranty.
Specifications side by side
| Baxi 800 Combi 2 36kW | Telford Tempest 300 Indirect | |
|---|---|---|
| Dimensions | 700 x 390 x 285 mm | 1750 mm high x 580 mm diameter |
| Weight | 29.5 kg | 61 kg |
| Warranty | 10 years | Lifetime guarantee on the body with annual service, 2 year component guarantee |
| 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 | - | 300 litres |
| Material | - | 2304 duplex stainless steel |
| Relief valve setting | - | 7 bar / 90C |
| Immersion heater | - | 3kW, 240V single phase, included |
Sources: Baxi 800 Combi 2 36kW, Telford Tempest 300 Indirect. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the 800 Combi 2 36kW if...
- you want one that comes with 8 years more warranty
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 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 Baxi 800 Combi 2 36kW and the Telford Tempest 300 Indirect?
The Baxi 800 Combi 2 36kW comes with 8 years more warranty. The Baxi 800 Combi 2 36kW is a gas combi boiler, 36 kW hot water output; the Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
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