made in the uk Stelrad
Istor

Istor HE

System Store

Designed for the busy home that requires lots of hot water, the Istor system store provides a complete high performance heating and hot water solution, all from a single appliance that fits inside an airing cupboard or utility room.

A rated and incorporating both a high efficiency boiler and an unvented cylinder, the Ideal Istor is a floor standing compact unit that is capable of delivering mains pressure hot water from more than one outlet simultaneously.

Available in two sizes, the 260 and 325, the integral cylinder contents (80 or 120 litres) is immediately available for use within the home. An integral thermostatic mixing value blends the hot water to suit the requirements of the homeowner, whilst also fulfilling the normal heating demands.

The Istor is quick and easy to install thanks to a prepiping frame, which allows the pipework to be made before fitting, and the added choice of an optional condensate-drain pump kit.

Complete with a 1 year parts and labour warranty, the Istor incorporates an easy to use hot water and heating programmer as standard, for independent selection of CH/DHW on/off times.

Istor HE System
1 year warranty Compact cupboard fit Digital display Frost protection Flue variants NOx class 5
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.

Features & Benefits at a glance

  • SEDBUK (2009) 89% rated
  • No cupboard ventilation required
  • Airing cupboard compact fit
  • Choice of fluing options
  • Pre-piping frame
  • Pre-fitted filling loop
  • In built water controls
  • 2 channel programmer fitted as standard
  • Immersion heater fitted as standard
  • Alpha-numeric diagnostics
  • 1 year parts and labour warranty
  • Extended warranty options available
  • Available in two sizes 240 or 325
    (with 80 or 120 litre cylinders)
Technical Specification: Istor HE
  • Size & Performance
  • Construction & Installation
  • Clearances & User Interface
  • Pipes & Flues
260325
Casing dimensions (h w d) mm 
Height14001600
Width560560
Depth600600
Weight (packed kg)124.5131.5
Maximum Installation Weight (kg)114120
  
CH output (kW) Min/Max @ 70C8.8 - 23.4
CH output (kW) Min/Max @ 40C9.6 - 25.1
DHW output (kW) Max29.3
DHW flow rate l/min. 35°C riseDHW stored @ 70C
SEDBUK ratingBand A
SEDBUK %90.10%
NOx ClassificationClass 5
Adjustable to LPGNo
 260325
Heat exchanger materialCast Aluminium - Silicon Alloy
Burner typeDownward firing pre-mix
Fully modulatingYes
DHW plate heat exchangerUnvented cylinder
Integrated hydroblockUnvented cylinder
  
Suitable for sealed systemsYes
Suitable for open-vent systemsNo
Filling loopYes
Pre-wired mains leadN/A
Flow regulatorN/A
Inbuilt system bypassNo
Inbuilt condensate trap/siphonYes
Inbuilt boiler frost protectionYes
Zero compartment ventilationYes
 260325
Top (mm) (from top of boiler)450
Side (mm)5
Bottom (mm)N/A
Front (mm)165
  
User displayAlpha-Numeric
User interfaceDigital display & manual controls
DiagnosticsFault code diagnostics
User adjustableCH manual adjustment
‘Eco’ setting on CHNo
Inbuilt ProgrammerYes
 260325
Pre-piping kitStandard
Stand-off kitN/A
Upward piping kitN/A
  
Max horizontal6m
Max vertical7.5m
Powered Vertical22m