As a standard immersion heater is 3KW, so it would take 2 hours to heat 100 Litres of water. After an hour and a half, it will only have reached about 53 degrees.....
Podiatrists cite Plantar Fasciitis as being the most common cause of heel pain. Typical symptoms of this condition include sensations of pain, burning or heat in one or both heels.
There are various causes of pain on the bottom of the foot, including heel spurs, plantar fasciitis and fallen arches, according to WebMD. Heel spurs are bone growths that form on the bottom of the heel bone, leading to pain when walking or standing. Continue Reading.