made in the uk Stelrad
Imax boiler

Imax W

Heat Only

Promising years of seamless performance and superb efficiency, our comprehensive range of heat only boilers are ideal if you need a direct replacement or a larger output. The Imax W range offers the benefits of a compact design and flexible siting, plus the peace of mind that comes with minimal maintenance and low running costs.

Especially designed for the larger domestic property, or small commercial property, the Imax W combines ultimate performance with reliablity; all from a single compact wall hung appliance with a 1 year warranty as standard.

Imax boiler
1 year warranty Compact cupboard fit Digital display Frost protection Flue variants NOx class 5
1 year warranty as standard.
Compact fit for convenience.
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

  • Compact, wall hung
  • Perfect for the larger property
  • Flue supplied as standard
  • Available in a wide range of fluing options
  • Parts and labour warranty
  • Extended warranty options available
  • Performance range of large domestic/small commercial boilers
Technical Specification: Imax W
  • Size & Performance
  • Construction & Installation
  • Clearances & User Interface
  • Pipes & Flues
W45W45PW60W60PW80W80PW100
Casing dimensions (h w d) mm 
Height900900
Width540650
Depth500500
Weight (packed kg) 
Maximum Installation Weight (kg)87878888100
  
CH output (kW) Min/Max @ 70C12.6/43.712.6/58.919.5/78.223.1/95.9
CH output (kW) Min/Max @ 40C13.9 - 46.913.7 - 45.913.9 - 62.313.6 - 60.621.3 - 82.720.7 - 8026.1 - 103.1
DHW output (kW) MaxN/AN/AN/AN/AN/AN/AN/A
DHW flow rate l/min. 35°C riseN/AN/AN/AN/AN/AN/AN/A
SEDBUK ratingBand A
SEDBUK %90.0%90.0%91.30%90.40%N/A
NOx ClassificationClass 5
Adjustable to LPGN/A
 W45W45PW60W60PW80W80PW100
Heat exchanger materialCast Aluminium - Silicon alloyCast Aluminium - Silicon alloy
Burner typeGauze Plaque
Fully modulatingYesYes
DHW plate heat exchangerN/AN/A
Integrated hydroblockN/AN/A
  
Suitable for sealed systemsYesYes
Suitable for open-vent systemsYesYes
Filling loopNoNo
Pre-wired mains leadNoNo
Flow regulatorN/AN/A
Inbuilt system bypassNoNo
Inbuilt condensate trap/siphonExternal includedExternal included
Inbuilt boiler frost protectionYesYes
Zero compartment ventilationYes (ventilation dependent on flue system used and location)No
 W45W45PW60W60PW80W80PW100
Top (mm)
(from top of boiler)		200 - 350 dependent on flue system used 3200 - 365 dependent on flue system used
Side (mm)5050
Bottom (mm)300300
Front (mm)450450
  
User displayAlpha NumericAlpha Numeric
User interfaceYesYes
DiagnosticsYesYes
User adjustableYesYes
‘Eco’ setting on CHN/AN/A
Inbuilt ProgrammerNoNo

3 80/125 concentric, vertical 200mm, horizontal 350mm (410mm for 100/150)

 W45W45PW60W60PW80W80PW100
Pre-piping kitYes - as part of multiple boiler frame & header kit
Stand-off kitNo (a floor standing boiler frame kit may be offered as an alternative)
Upward piping kitNoNo
  
Max horizontal31.6 (100/150)
9.5 (80/125)		26 (100/150)
7.8 (80/125)		16 (100/150)11 (100/150)
Max vertical31.6 (100/150)
9.6 (80/125)		26 (100/150)
7.8 (80/125)		16 (100/150)13 (100/150)
Powered VerticalOpen flue kit 80 20mOpen flue kit 80 13.3mOpen flue kit 100 29mOpen flue kit 100 13m