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.
(See Anatomy of the Foot and Ankle). Gait abnormalities can cause inflammation of the structures attached to the heel bone, resulting in heel pain. Inflammation of the plantar fascia, called plantar fasciitis, is the most common cause of heel pain.Plantar fasciitis often causes pain that is more severe following a period of rest (e.g., after sleeping).eel pain also is relatively common in active children and adolescents between the ages of 8 and 13. Pediatric heel pain frequently occurs on the bottom rear of the heel or the sides. Heel pain occurs in both heels (bilaterally) in less than 30 percent of cases. The left heel is commonly the first to be affected.