AESTB327 2¼" 3kw 11" Immersion Heater (AESTB327)

Product Code: SH311A-AA1CA1

Product Information


Key features

– For use in water, in domestic applications
– Single thermostat pocket
– Large range of thermostats available
– product approved by NEMKO – certificate available on request

Technical data

– Material: Incoloy 800
– Loading: 3kW
– Element diameter: 8mm
– Head size (BSP): 2 ¼ ”
– Temperature range: 70°C Max Op Trip, 80°C Safety (depends on fitted thermostat)
– Voltage: 240V 1-Phase
– Optional: Supplied with thermostat


This is a 3kw, 11inch immersed length Incoloy Immersion Heater complete with combined (operating & safety cut-out) plug-in thermostat. This product will often carry the ThermTec brand which is owned and manufactured exclusively by Heatrod Elements. The AESTB327 can be used in all standard domestic water areas including normal use in hard water areas susceptible to limescale.

The element is bonded to the brass flange with an environmentally friendly, WRAS approved, epoxy bond, making for more robust hydraulic and corrosion proof performance.

If particularly aggressive water conditions are present or the duty/usage is higher than normal then we would recommend a titanium element version which can be priced and manufactured on request.

Diamond H WTS,  Cotherm TSE00187 and Thermowatt RTS-3 dual function thermostats can be used with this immersion heater – see our “Thermostats & Controls
section for more details and to purchase these products.

This product can also be used to replace product code T11AN.

This product is designed to meet European Standards EN 60335-2-73:2003 +A1:06 + A2:09 used with EN 60335-1:2012 for the safety of electrical appliances that heat liquids for household and similar purposes. Testing has been carried out and the product approved by NEMKO – certificate available on request.

Previously called: SH311A-AA1CA1.

Installation Instructions for AESTB327 can be found here.



How to Measure the BSP Thread size of your Immersion Heater:

Once you have measured the thread, use the table below to select the correct BSP size:

£45.19 inc. VAT

In stock

SKU: SH311A-AA1CA1 Categories: ,

Additional information

Sheath Material

Head Size (BSP)

Thermostat Type

, ,

Stat Inches

Element Diameter (mm)

Voltage (V)

Secondary Protection

Length (mm/Inch)

Loading (kW)


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