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Energy Cost of High Ventilation Rates in a Large Office Building in Montreal

Centre for Building Studies, Concordia University, Montréal, Qué., Canada

P. Fazio

Centre for Building Studies, Concordia University, Montréal, Qué., Canada

M. Zhaonan

Centre for Building Studies, Concordia University, Montréal, Qué., Canada

This paper presents an analysis of the impact of an increase of the air ventila tion rate on the energy cost in a large existing office building in Montréal, based on a computer simulation using the MICRO-DOE2 program. An increase of 3.2% or CAN$ 37,000 in the total annual energy cost could be expected if the ventilation of outside air is increased from the present rate (7.6 1/s/person) to a higher one (10.0 1/s/person), which corresponds to ASHRAE recommendations. By extrapolating this result to the case where the ventila tion rate is increased from 2.4 to 10.01/s/person, the expected increase in the total annual energy cost would be about 10% or CAN$ 117,300. This increase is higher than those previously estimated by other workers.

Key Words: Simulation • Ventilation rates • ASHRAE Standard 62-1989 • Energy costs

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