Thermann Small THERMANN MKII ELEC HWU      SE 25L 3.6KW
  • 7


    Cylinder Warranty



Thermann Small Electric hot water systems allow you to install hot water where space and access is restrictive. With its ‘V Fit’ configuration, inlets and outlets are configured for ease of installation. 

  • Available in 'appliance white' for a more aesthetically pleasing unit
  • Manufactured using state of the art machinery

Prices are inclusive of GST

Must be installed by a licensed plumber.

The Process

  1. A hot water tap is turned on
  2. Hot water is drawn from the top of the tank
  3. Cold water enters through the bottom of the tank
  4. When temp around the element drops, element activates.
  5. Hot water rises to the top of the tank
how it works diagram
Total Height (A) 455 670
Total Diameter (B) 405 405
Outlet Height (C) 280 490
Inlet Height (D) 155 145
Electrical Entry (E) 65 70
Element Angle (K) 55° 55°
Storage Capacity (L) 31 50
Hot Water Delivery (L) 25 50
Net Weight Empty (kg) 17 23
Element Sizes (kW) 2.4*, 3.6 2.4*, 3.6
Relief Valve
Pressure (kPa) 1000 1000
Max Inlet Pressure
Without an ECV (kPa) 800 800
With an ECV (kPa) 650 650

*2.4kw plug in only

Selecting the right unit for you

Inlet/Outlet Dual Hand Dual Hand
No. People (continuous) 1 1-2
No People (off peak) 0 0

first small electric tech drawing
second small electric tech drawing

When choosing a hot water system, there are a number of factors you need to consider beyond the unit price. Installation costs can vary greatly for different types of hot water units. Ongoing running costs should also play a part in your purchase decision.

running cost chart

Guide only based on current average energy cost. This chart does not account for increased Electricity or Gas costs in coming years.

Where to Buy

Thermann hot water systems are available exclusively through Reece Plumbing. Find your nearest branch by entering your postcode below.

(You will be taken to the Reece website)


Here are the most common questions we get asked about hot water.

Get in Touch

Want to find out more about any of the hot water systems in the Thermann range? We’re happy to help.