Associations between classroom CO2 concentrations and student attendance in Washington and Idaho

This paper presents the results of a study that explored if higher indoor minus outdoor CO2 concentrations were associated with increased student absence. The results of multivariate analyses are presented.

Estimating effects of moisture damage repairs on students' health - long-term intervention study

After the moisture damage repairs, a health symptom questionnaire study was repeated 1 year, 3 years and 5 years on 245 upper secondary and high school students. The data were analyzed. The results indicate that no new cases of symptomatic students occured : in that sense the repairs succeeded.

Airborne asbestos levels in school buildings in Italy

A summary of environmental investigations carried out from 1992 to 2002 in Italian schools in operation by the ISPESL is provided in this article. After having identified the potential sources of exposure, bulk and air samplings were performed in the suspected contaminated areas. The samplings were then collected on membrane filters. Their analysis was made by phase contrast optical microscopy and scanning electron microscopy.

Modeling of occupant-generated CO2 dynamics in naturally ventilated classrooms

This paper presents a numerical method to estimate the concentration of occupant-generated C02 for the occupancy found in elementary school classrooms with nonforced ventilation.

Impact of ventilation systems on indoor air quality and annual energy consumption in school buildings

The paper presents the results of the analysis of the impact of various ventilation systems on indoor air quality and energy consumption, performed for a typical Polish elementary school that was built in 1970s. Simulations were made with the use of two computer codes: CONTAM W and ESP-r. A multizone model of the global capacity of 9464 m3 was performed. The model contained 17 classrooms and 10 additional rooms typical of such buildings.

Indoor air quality in classrooms : field campaign by questionnaires and measurements

A research project aimed at investigating IAQ and thermal, acoustic and visual comfort was carried out in Italian high school and university classrooms. The investigations were performed through field campaigns during regular lesson periods consisting of subjective surveys and measurements. This work focuses in analysing the results from the IAQ investigations at four high schools of Provincia di Torino during the heating period.

Indoor conditions in ultralightweight structures : a case study

Steel truss structures, covered with a PVC thin sheet of matt light colour, were used in recent time for the construction of three new classrooms in the University of Catania (southern Italy). Although the construction was fast and cheap, the classrooms proved to be uncomfortable in relation to thermal and luminous environment. A first analysis revealed that the drawbacks were caused by the ultra-lightweight of the structure as a whole, resulting in thermal discomfort.

Indoor air quality in classrooms of renovated school building in Lithuania

The purpose of this study was to assess indoor air quality as well as actual ventilation in renovated school classrooms. A typical naturally ventilated school building was chosen to install different air inlet units in identical classrooms. Later measurements of carbon dioxide concentrations, temperature, relative humidity and air velocity were carried out. Actual measured values were compared with Lithuanian and European standards. This study gives the evaluation of renovating process in the Lithuanian schools, which began in 1997.

Hybrid ventilation in retrofitted buildings - concepts, strategies and measurements

How can hybrid ventilation and natural ventilation significantly improve the indoor climate in retrofitted office and education buildings? During the last 5 years hybrid ventilation and natural ventilation have increasingly been utilised in refurbished and retrofitted buildings with great results. Utilising a newly developed system solution concept, it is illustrated how intelligent control of buildings can establish a good indoor climate with satisfied users. This article contains results from 4 building cases including two schools and two office buildings in Denmark and Switzerland.

Energy savings and indoor air quality in retrofitting of educational buildings

A significant part of existing educational buildings have to be retrofit in the next years inFrance. The economical, environmental and social requirements have increased with theinternational targets of reduction of greenhouse emission and sustainable development.