HVAC system outdoor airflow rates are usually measured and set at the air-handling unit. The effectiveness of an HVAC system at delivering the outdoor air to the occupied spaces of a building is varied and often disputed. To investigate the delivery of outdoor air to the occupied spaces of a variable-air-volume system, ASHRAE Technical Committee 9.1, Large Building Air Conditioning Systems, funded Project 687- TRP, Minimum Ventilation Airflow Rates with VAV Systems. This article presents some of the information collected during that project.

ASHRAE is developing a standard to ensure cabin air quality 1) is safe for flight and occupants; 2) minimizes the potential for adverse health effects; and 3) is comfortable to occupants. ASHRAE Technical Committee 9.3, Transportation Air Conditioning, issued a work statement for the study, "Relate Air Quality and Other Factors to Symptoms Reported by Passengers and Crew on Commercial Transport Category Aircraft." The study's purpose is to support the development of ASHRAE Standard Project Committee 161P, Air Quality in Transport Category Commercial Aircraft. 

The Peterborough Environment City Trust has embarked on an ambitious energy saving programme involving the whole community Rose Riddell looks at what has been achieved so far.

Home energy ratings seem reliable, but are they? We look at the results from one experiment that tries to answer this question for the existing homes market.

As the ratings industry in the United States shifts from a subsidized market to an unsubsidized one, we look at four areas of opportunity for home energy raters. Will these opportunities be growing or collapsing in the 21st century?