Although i agree with you, depending on your system it doesn't actually cost a lot to keep a water tank hot 24/7.
During a 2 week period, we used about 225Kw/h, which equates to about £6.20 at 2.77p per Kw/h. This included hot water tank 24/7, an average of 2 showers a day, moderate cooking with gas and a gas fire on for a couple nights for a few hours.
never seen the point of dehumidifiers personally cost money to buy and operate. heating and ventilation/air circulation should be enough. unless you live in a small studio flat.
