An integrated energy - IAQ study on the impact of filtration techniques in an air-conditioned office building in the tropics

In an air-conditioned office building in Singapore, 3 different filtration systems have been evaluated under similar fresh air intake and ventilation rate conditions (electrostatic filtration, electrostatic filtration with chemical adsorption, and media filtration) . Chemical and microbial contamination levels under different filtration strategies have been monitored.

Air filtration system in an office building: from design to validation

Provision of good IAQ in buildings located close to a busy road requires application of air filtration systems which are efficient for submicrometer and especially ultra fine particles, since traffic emissions are associated with particles in these size ranges. A study has been conducted in which a filtration system of an office building was designed according to measured outdoor air conditions and theoretically predicted indoor air conditions. The performance of the system was then validated by field measurements of particle concentration levels indoors and outdoors.

Building-related risk factors and work-related lower respiratory symptoms in 80 office buildings

Authors assessed building-related risk factors for lower respiratory symptoms in office workers. The National Institute for Occupational Safety and Health in 1993 collected data during indoor environmental health investigations of workplaces. Multivariate logistic regression analyses were used to assess relationships between lower respiratory symptoms in office workers and risk factors plausibly related to microbiologic contamination.

Field investigations on comfort in office buildings

A method based on both measurements and questionnaire has been developed to investigate comfort in office buildings. The measurements apparatus records temperature, humidity, noise, light, odours and occupant's perceived comfort. The questionnaire contains information about indoor climate and working environment. Results are given and analysed for 60 offices in France.

One year measurement of indoor air quality in building offices

Measurements of indoor air quality indicators (temperature, humidity, dust, biocontaminants and CO2) were performed monthly during one year in a French office building. Air filters of the air handling unit of the building have also been characterised on site and in laboratory. Detailed results of these measurements are given and analysed.

Experimental and numerical studies on local high efficiency air conditioning system for office buildings

The effects of an air conditioning system for office buildings were studied experimentally and computationally. A displacement ventilation system was used as the main air-conditioning system, and a partition with a built-in circular fan was used to deliver the air-conditioned clean air near the floor supplied by the main displacement system to the occupant in the office directly.

Office building ministry of transport at Terneuzen, The Netherlands: low energy, high thermal comfort and high sustainability in one concept

The new office building of the Ministry of Transport at Terneuzen in the Netherlands is a sustainable and energy efficient building with a good indoor environment. The building is constructed of sustainable materials, well insulated, utilises maximum daylight and is equipped with a minimum of building services. Passive and natural sources have been utilised as much as possible. An advanced natural ventilation system provides fresh air and controls the thermal comfort in summer.

Do indoor environments in schools influence students performance ? A review of the literature

The study is a review of 600 articles to determine if indoor environments does influence student performance at school. The study has been extended to other categories (laboratories, offices). No direct relationship has been statistically shown but results suggest a link between ventilation rate and performance, as well as for presence of carpets, pollens or low efficiency filtration.

Effect of outside air ventilation rate on VOC concentrations and emissions in a call center

The relationship between outside air ventilation rate and indoor VOC concentrations was studied through measurements in an office building (the call center of a health maintenance organization - 4600 m2 - 290 persons). Direct relationships between ventilation rate and concentrations were not found for most VOC's.

Decentralized building automation and hybrid ventilation at ING HQ's

This paper describes the hybrid ventilation system of a new office building (650 employees) in Amsterdam (The Netherlands) equipped with a decentralized building automation and individual controls.