Ventilation and temperature efficiencies of mechanical ventilation systems.

Gives measurements of the ventilation as well as the temperature efficiency of mechanical supply and exhaust systems (balanced systems). The ventilation efficiency is a measure of the performance of providing air in the occupied zone and is also an indicator of the air quality. The temperature efficiency is a measure of the system's capability of supplying heat in the occupied zone. Monitors ventilation efficiencies by adopting tracer decay techniques and the temperature efficiencies by measuring the stationary temperatures. In experiments, the following quantities are varied systematically.< 1. The positioning of supply and exhaust registers.< 2. The ventilation air flow rate.< 3. The temeperature of the supply air relative to the mean temperature in the occupied zone.< The findings show significant differences in performance between different systems.