Istor HE
System Store
Our high efficiency A-rated system boilers combine the highest standard of British engineering with contemporary styling and intelligent design. Trusted by installers and homeowners throughout the UK, the Istor range is SEDBUK A rated and come complete with a 1 year warranty as standard.
Perfect for the busy home that requires lots of hot water, the Istor provides a complete high performance heating and hotwater solution, all from a single appliance that fits inside an airing cupboard or utility room.
Available in two sizes, the 260 and 325, the cylinder contents (80 or 120 litres) are immediately available for use within the home and can be rapidly replaced when depleted.
1 year warranty as standard.
This boiler is designed to fit into a standard kitchen cupboard.
Clear digital display for plain and simple logistics.
Frost protection, so your boiler will run in harsh weather.
A range of flue options to suit your home.
Low NOx levels means low emissions.
Sedbuk A rated - a minimum of 91% seasonal efficiency, which means lower emissions and lower gas bills.
Features & Benefits at a glance
- SEDBUK Band ‘A’ fuel efficiency rating to lower emissions and reduce heating bills
- 1 year parts and labour warranty
- High-efficiency boiler and unvented cylinder combined in one unit, taking the provision of central heating and hot water to a new level
- Versatile flue design to allow installation in the most convenient location
- Intelligent user-friendly controls
- High outputs of 260 or 325 to satisfy the most demanding household’s central heating and hot water needs
- Size & Performance
- Construction & Installation
- Clearances & User Interface
- Pipes & Flues
| 260 | 325 | |
|---|---|---|
| Casing dimensions (h w d) mm | ||
| Height | 1400 | 1600 |
| Width | 560 | 560 |
| Depth | 600 | 600 |
| Weight (packed kg) | 124.5 | 131.5 |
| Maximum Installation Weight (kg) | 114 | 120 |
| CH output (kW) Min/Max @ 70C | 8.8 - 23.4 | |
| CH output (kW) Min/Max @ 40C | 9.6 - 25.1 | |
| DHW output (kW) Max | 29.3 | |
| DHW flow rate l/min. 35°C rise | DHW stored @ 70C | |
| SEDBUK rating | Band A | |
| SEDBUK % | 90.10% | |
| NOx Classification | Class 5 | |
| Adjustable to LPG | No | |
| 260 | 325 | |
|---|---|---|
| Heat exchanger material | Cast Aluminium - Silicon Alloy | |
| Burner type | Downward firing pre-mix | |
| Fully modulating | Yes | |
| DHW plate heat exchanger | Unvented cylinder | |
| Integrated hydroblock | Unvented cylinder | |
| Suitable for sealed systems | Yes | |
| Suitable for open-vent systems | No | |
| Filling loop | Yes | |
| Pre-wired mains lead | N/A | |
| Flow regulator | N/A | |
| Inbuilt system bypass | No | |
| Inbuilt condensate trap/siphon | Yes | |
| Inbuilt boiler frost protection | Yes | |
| Zero compartment ventilation | Yes | |
| 260 | 325 | |
|---|---|---|
| Top (mm) (from top of boiler) | 450 | |
| Side (mm) | 5 | |
| Bottom (mm) | N/A | |
| Front (mm) | 165 | |
| User display | Alpha-Numeric | |
| User interface | Digital display & manual controls | |
| Diagnostics | Fault code diagnostics | |
| User adjustable | CH manual adjustment | |
| ‘Eco’ setting on CH | No | |
| Inbuilt Programmer | Yes | |
| 260 | 325 | |
|---|---|---|
| Pre-piping kit | Standard | |
| Stand-off kit | N/A | |
| Upward piping kit | N/A | |
| Max horizontal | 6m | |
| Max vertical | 7.5m | |
| Powered Vertical | 22m | |