I am looking for recommendations for hot water cylinder manufacturers
that offer products with good insulation. I want that because it's to
be heated by electricity and I probably won't use enough power to
justify economy [ha ha!] rate.
I am also curious to know how powerful the heater element can be? Can
I have a rating as high as an electric shower might be, like 9kW?
Couldn't you just fit two immersion heaters - one through the top and
near the base of the cylinder (as long as it doesn't foul any indirect
Then set the thermostats appropriately...
Okay, there must be a catch... over to the more knowledgable folks.
Although I've heard of immersions of > 3kW power, I've heard more frequently
of installing several standard heaters into the same cylinder. Obviously,
you'll have install a hefty cable back to the consumer unit and ensure that
switching and protection arrangements are adequete. I'd imagine that a
contactor would be required if you want any sort of timer action on them,
although a 45A DP switch should do for simple functional switching, if you
want to heat 24/7. Their internal thermostats are adequete for temperature
control, but make sure they have a manual reset overheat stat. Not all of
You might want to consider using low noise versions. 3 standard immersions
would sound like Concorde taking off.
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