That study carried out particle transport measurements for full-scale timber frame structure similar to a wooden floor. The penetration is highly dependent on pressure difference and not on holes in the surface boards of the structure. The results showed that surface contacts of mineral wool with other building elements may have an important role in penetration.
The aim of that study was to find out if heating is the alternative for crawl space moisture control with a reasonable low energy consumption. Using a ground cover without thermal insulation and heating of the crawl space proved to be a good alternative method to control mold growth.
The aims of that study were to find out how the thermal capacity, resistance, and the placement of insulation layers affect relative humidity in crawl spaces. The results show that there are two alternative ways to use ground covers in combination with air change to achieve acceptable conditions in crawl spaces.
The aims of that study were on the one hand to find out how relative humidity can be reduced by optimal selection of ground covers and air change rates, and on the other hand to evaluate the acceptability of achieved moisture conditions by means of mould growth analyses. Two buildings (one relatively warm and the other relatively cold) were studied with the resistance-capacity network model. Simulations of thermal and moisture buffering effects of air change rates and various ground covers were made.
This paper describes the smoke control aspects of twonaturally ventilated high-rise office buildings with operable windows. One utilizes its operable windows in conjunction with an HVAC system to provide tenants with fresh air. The other utilizes a series of automatically controlled windows and
vents in conjunction with tenant-controlled windows to provide ventilation. Both buildings, located in San Francisco, were designed under the Uniform Building Code.
A cubic experimental chamber with 2.5m of sides was designed to measure the impact of the ventilation on particle concentration. Particles of 0.3 - 15µm diameter were used. Two ventilation parameters were studied: the ventilation rate (0.5 and 1.0 ach) an
Natural ventilation and infiltration are used for pollutant dilution and providing ‘fresh’ outdoor air supply in many buildings, in particular in residential buildings. Questions are often asked when natural ventilation should be encouraged. A balance-poi
The study has been carried out in two different French buildings. The main objective of the study was to know more about office buildings’ indoor air quality as well as HVAC installation working over a long period (1 year). A lot of data are available but
Penetration of inert particles with a size range from 0.6 to 4 µm and spores of Penicillium and Cladosporium was studied through a full scale timber structure. Pressure difference and air leakage over the structure were varied. Measurements at moderate pr
The aim of that study was to find out if a potential air flow from crawl space has an influence on the indoor air quality : is there a potential risk for the first floor apartments ? A balanced ventilation system is recommended.
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