Your newly purchased house where you are aiming for an indoortemperature of 18.0°C is well insulated apart from a 5.0 cm thick12m² wooden wall facing the garage. Typically, the garage maintainsa temperature of at least 9.0°C even in winter. What power do youlose because of the wall? One winter evening, the garage door getsstuck in the upright position and you want to know what the indoortemperature will be when the coldest night is -15.0 ° C in thegarage. You can heat the room with a 400 W power element.
