Put simply, the higher the watt density, the higher the sheathe operating temperature, and the quicker & more efficiently the crust of Calcium and Magnesium builds up.
For a more detailed explanation of Watt Density, click here.
If we can loop the elements –
…rather than just having U bent elements –
…we can fit almost twice as much element into the available space, thus massively reducing the watt density.
We can do this ith our 8mm diameter elements on screwplugs 2″BSP and above. Sadly, on 1.75″BSP and below, the head simply won’t accommodate the elements, so we are restricted to only U bent elements. Which is a great shame, as the Domestic Standard at 1.5″BSP, and the Unvented Cylinder Standard of 1.75″BSP suffer this unecessary restriction. The Industrial Standard of 2.25″BSP thankfully does not!
We will always push to use the MAXIMUM available immersed length. Our Stock Heaters available off the shelf are a Best Fit compromise. But longer, bespoke heaters, manufactured in the UK in weeks rather than months, will get you the best possible watt density, and thus working life.
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