To limit the probability that random service water heating loads and schedules and inconsistent occupant-dependent factors for the reference and proposed houses will be used as input in the energy model calculations, which could lead to inaccuracy of the model, which could lead to overestimation of the energy used by the reference building or underestimation of the energy used by the proposed building, which could lead to excessive use of energy, which could lead to an unacceptable effect on the environment.