Question

the balance point is
o the point at which the heating and cooling capacities are the same
o the point at which the back - up heat capacity and heat pump capacity are the same
o the point at which the heat pump can just keep up with the heat loss
o the point below which the heat pump cannot add enough humidity to the home
o the point below which the back - up heat must be abandoned

Explanation:

In heating - cooling systems, the balance point is defined as the temperature at which the heat pump's heating capacity is equal to the building's heat loss rate, meaning it can just keep up with heat loss.

Answer:

the point at which the heat pump can just keep up with the heat loss