The performance of four types of heat-pipe heat recovery unit for naturally ventilated buildings was determined in terms of effectiveness and pressure drop. The effectiveness of the heat recovery units was tested in a two-zone chamber. The pressure loss characteristics of the heat recovery units were determined using computational fluid dynamics (CFD) and experimental measurement. CFD was also used to evaluate the performance of a solar chimney for heat recovery in naturally ventilated buildings.

Solving IAQ problems requires strategies and tools for making observations and measurements. This article covers the tools a future article will impart strategies for using them.

Acoustic designers could be costing clients money by over-specifying acoustic solutions. Now, software has been developed that tracks how sound moves through a building and how to stop it

An experimental method for the determination of the internal diffusion coefficient (D) and partition coefficient (ke) of volatile organic compounds (VOCs) is developed for dry building materials (such as carpet, vinyl flooring. plywood, etc.). The method is used to determine D and k0 for four VOCs (toluene, nonane. decane, and undecane ) through the backing material of a carpet specimen, for four vocs (ethylbenzene, nonane, decane, and undecane) through a floor tile specimen, and three vocs (cyclohexene, ethylbenzene. and decanc) through a plywood specimen.