Editing Storage heater (section)

===Disadvantages===
*Heat is lost from the heater while charging overnight. The room is warm in the morning, but this is because it has wastefully been heated all night.
*The heat stored during the night will be released into the living area during the next day, regardless of need (due to the inevitable [[heat transfer]] through the storage heater's insulation). Thus if the homeowner is unexpectedly absent that day (and therefore does not need the house to be warmed) or is only at home for a small part of the day, the heat has already been purchased and is already there, and eventually comes out.
*The storage heater can only heat with the energy stored the night before. Thus if the system was switched off or if the charge control was set too low, there may not be sufficient energy to heat the rooms, and this can only be corrected for the next day. This is a problem for example when the weather turns cold unexpectedly, or when returning from a vacation late at night, or users simply not thinking to change the settings because they are at a comfortable temperature. Some heaters alleviate this problem by also allowing heating during the day, but this is typically expensive (because the electricity is charged at full rate). Even under the best of circumstances it can be difficult to accurately judge how to set the thermostats as setting them too low overnight can cause the heater to be having no perceived effect while setting them at maximum will increase the cost of running them. Similarly in systems where every heater must be set individually, incorrectly setting one room's heater can make the whole house feel too cold.
*Many users may not fully understand the controls. A common error is leaving the output (or boost) control open at night, so that the heaters dissipate heat when they should be storing it, with a consequent increase in electricity consumption and cost. Alternatively they may set the input control to minimum at night instead of the output, which can mean there is no heat at all for the next day.
*Sizing a storage heater is a compromise between the maximum expected cold-spell intensity and duration, and the cost and space requirement of the heater. If the heater is too large, its cost will be excessive and it will impact on the building's available area; if too small, the cost of supplemental (daytime) electrical heating will be excessive.
* Storage heaters are very heavy and somewhat bulky, due to the material used to store heat. They typically take up more floor space than the [[radiator]]s used in most other heating systems.
* In most countries, [[electricity]] costs 2-3 times as much as gas or oil per unit of heat (joule or kWh), and the reduced off-peak tariffs and higher delivery efficiency do not fully overcome this difference.
*When the fan (if included) is used to speed up heat transfer, the air circulation will increase the amount of airborne dust in the heated room. This can be a problem for people with allergies. Therefore, central heating is a better source of heat for allergy sufferers.<ref>[http://www.klima-sucht-schutz.de/service/beitrag/article/nachtspeicherheizung-1.html Klima sucht Schutz: Nachtspeicherheizung] article on storage heaters (German)</ref> This can be avoided by not using the fan, but then it is more difficult to regulate the heat transfer, which occurs by radiation and natural convection as with normal central heating radiators.