Head to head
Ariston Velis Evo 80 vs Telford Tempest 300 Indirect
The Ariston Velis Evo 80 is a electric storage water heater, 80 litres. The Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
Last reviewed 13 September 2026
Specifications side by side
| Ariston Velis Evo 80 | Telford Tempest 300 Indirect | |
|---|---|---|
| Capacity | 80 litres | 300 litres |
| Power | 1.5kW dual heating element (max 1.5kW draw at any time) | - |
| Heat-up time | shower ready in 50 minutes | - |
| Depth | 270 mm (slim twin-tank design) | - |
| Energy rating | B | - |
| Installation | requires the supplied unvented kit | - |
| Dimensions | - | 1750 mm high x 580 mm diameter |
| Weight | - | 61 kg |
| Material | - | 2304 duplex stainless steel |
| Relief valve setting | - | 7 bar / 90C |
| Immersion heater | - | 3kW, 240V single phase, included |
| Warranty | - | Lifetime guarantee on the body with annual service, 2 year component guarantee |
Sources: Ariston Velis Evo 80, Telford Tempest 300 Indirect. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Velis Evo 80 if...
An 80 litre slimline electric storage water heater at only 270mm deep, suited to a flat, annexe or holiday let with no boiler-fed hot water. Its twin-tank design is quoted as giving more usable hot water than a standard single-tank heater of the same size.
Full Velis Evo 80 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 Ariston Velis Evo 80 and the Telford Tempest 300 Indirect?
The Ariston Velis Evo 80 is a electric storage water heater, 80 litres; the Telford Tempest 300 Indirect is a indirect unvented hot water cylinder, 300 litres.
GetBrent is an independent directory and is not a dealer for, nor affiliated with, either manufacturer. Model and brand names are the trademarks of their owners.