How to use this result
Some bedroom comfort fixes are cheap to test, while others should only be used when they solve a real repeat pattern. This calculator turns the power label, hours and tariff into a simple nightly and monthly estimate.
Use it after identifying the room problem: heat, cold, damp or airflow. A device that does not fix the actual pattern is still wasted energy even if the per-night cost looks small.
Costs are approximate because tariffs, thermostats and duty cycles vary.
Best use
Run the tool, choose one change, repeat it for two or three nights, then compare the room notes. A repeated pattern is more useful than one perfect-looking number.
