which one did you buy?
Some cheap 3kw jobby from screwfix or toolstation at about £25 - the longer one rather than the one that is about a third of the length. Just make sure that you don't have it touch the plastic of the tank sides, bottom or baffles.
How much is this costing you to heat the water this way do you think?
As a rough guess and average prices a 3kw heater on 24/7 will cost £3k per year
365 days in a year, 24 hours in a day mean 8760 hours in a year.
£3000 divided by 8760 = £0.34p per hour to run you immersion
so if you have it on 10 hours per night that £3.40 per day.
£3.40 x 7 days £23.80 per week to heat
£95.20 per month (4 weeks)
16 weeks of very cold temps(rough guess) = £380.80I wonder how this compares to having on demand hot via a boiler and LPG/GAS?

Pros/cons of immersion V's LPG/GAS on demand?
