If you look at the timescale for boiling water for a cup of tea or coffee, then the cordless electrical kettle must conserve you around 3 to four mins compared to an oven top pot. One more big benefit of the best electric tea kettle for hard water is the fact that it will certainly change itself off when the water has gotten to boiling point, this is very power reliable as it just makes use of the required amount of electrical energy needed to steam water for your mug of coffee.