The objective of this study is to propose a simplified characterization of thermal inertia, as part of the installation of a system of summer refreshment by means of nighttime cooling ventilation. On the basis of a previous study, conducted by relying upon a modal analysis, the interactions between the thermal inertia of a building and the variation of the air exchange rate have been explained.

The author maintains that the testing methodology of ASHRAE 62-1989R, mired in a swamp of controversy and "continuous maintenance," may need some fresh air.

 False fire alarms cost lives and students are often the worst offenders because of their less than silky cooking skills. HAC reveals how an 'allergy' to washing up liquid led to an innovative demand ventilation solution at Nottingham Trent University.          

This Update discusses how various factors affect the fire resistance of floors in multi-family dwellings. The information is based on results from a major industry/government research project carried out by the National Research Council's Institute for Research in Construction (IRC).