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.....
Another common cause of heel and calf pain is Achilles Tendinitis. Symptoms are frequently described as an aching pain in the back of the lower leg and just above the heel. This sensation is typically worse after exercise and upon first waking up in the morning.
Finally, heel pain sometimes arises because the foot does not absorb shock as it should. Less frequently, the patientâs heel pain is a result of a nerve entrapment, tendon dysfunction, or other plantar structural changes of the foot. Other common causes for heel pain include: Achilles tendonitis.