English

NADCA Standard 1992-01 is the first standard governing air conveyance system cleaning to be finalized by the National Air Duct Cleaners Association and its Standards Committee. This Standard generally addresses the mechanical cleaning of air conveyance system components composed of non-porous materials. Standard 1992-01 is intended to provide a voluntary performance standard which cleaners and building owners may wish to consider in determining the requirements for specific cleaning projects, and which can ensure certain minimum cleaning results on particular cleaning project

The comparison of four methods for the calculation of deep-basement heat loss is presented along with measured data for three basement types. The Mitalas method was found to give results in best agreement with measured data followed by the finite element method (FEM) program, the European Standard and the ASHRAE Fundamentals method. The studied methods, with the exception of the European Standard of which the physical background was unknown, were chosen because each of them is also representative of a particular physical model of decreasing complexity in the above order.

The role of building services engineers in providing healthy and comfortable conditions in buildings as well as protecting the environment, is a very important one. Billy Manning considers the issues.

There are many reasons why the air quality in a building may fall well short of what it was intended to be, explains Trevor Callen.

The computer program EMPTIED was used to assess the moisture performance of representative brick veneer and exterior insulation finish system (EIFS) walls under the climate conditions for fifteen locations in Canada The indoor conditions were assumed to be those expected in a one-bedroom apartment occupied by two persons which was ventilated with outdoor air at a constant rate of 0.3 air changes per hour.