| 1. | Of course no means whatever for turning off the immersion heater would be provided.
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| 2. | Low power electric immersion heaters are common with home spas.
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| 3. | The immersion heater expects 0.5 bar of water pressure from a loft head tank.
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| 4. | Hot water is provided by an outdated, inefficient non-condensing gas boiler and immersion heater.
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| 5. | Turning off the big immersion heater made HUGE savings.
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| 6. | Reason : measure the hight from the immersion heater top to the loft tank overflow.
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| 7. | If too much pressure builds up inside the immersion heater it would still overflow out the vent pipe.
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| 8. | Larger boxes with more ways will have separate fuses for large loads such as immersion heater, oven and shower.
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| 9. | There is a vent pipe from the immersion heater that allows any expansion of water to release safely outside.
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| 10. | With electricity becoming more prevalent in the 1920's fish enthusiasts began experimenting with electrical immersion heaters in glass tubes.
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