English to Russian Science Energy / Power Generation

Figure *** depicts the heating power required by a dwelling with different heating schedules and shows how the heating power (and thus the temperature) is rather higher when set-backs are applied.
For example, in the Evening schedule, the heating system is on for a few hours a day (5 hours).
When it is turned on, not only does the system need to overcome the heat losses, it also it needs to warm the building up.
If the heating system is functioning for longer periods as in the 14 hour and 24 hour schedules, the heating equipment solely provides heat to compensate for the heat losses.

Чем в графиках длительностью 14 и 24 часа??

Спасибо.