An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms.

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Abstract Text:

The effects of ventilation in computer classrooms were studied with university students (n = 355) in a blinded study, 31% were women and 3.8% had asthma. Two classrooms had a higher air exchange (4.1-5.2 ac/h); two others had a lower air exchange (2.3-2.6 ac/h). After 1 week, ventilation conditions were shifted. The students reported environmental perceptions during the last hour. Room temperature, RH, CO(2), PM10 and ultra-fine particles were measured simultaneously. Mean CO(2) was 1185 ppm at lower and 922 ppm at higher air exchange. Mean temperature was 23.2 degrees C at lower and 22.1 degrees C at higher air exchange. After mutual adjustment (temperature, RH, CO(2), air exchange), measured temperature was associated with a perception of higher temperature (P < 0.001), lower air movement (P < 0.001), and poorer air quality (P < 0.001). Higher air exchange was associated with a perception of lower temperature (P < 0.001), higher air movement (P = 0.001), and better air quality (P < 0.001). In the longitudinal analysis (n = 83), increased air exchange caused a perception of lower temperature (P = 0.002), higher air movement (P < 0.001), better air quality (P = 0.001), and less odor (P = 0.02). In conclusion, computer classrooms have CO(2) levels above 1000 ppm and temperatures above 22 degrees C. Increased ventilation from 7 l/s per person to 10-13 l/s per person can improve thermal comfort and air quality. Practical Implications Computer classrooms are crowded indoor environments with a high thermal load from both students and computer equipment. It is important to control room temperature either by air conditioning, sun shields, or sufficiently high ventilation flow. A high ventilation flow is also crucial to achieving good perceived air quality. Personal ventilation flow should be at least 10 l/s. Possible loss of learning ability due to poor indoor air quality in university buildings deserves more attention.

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Publishing Authors By Initials

For similar abstracts research abstracts see: abstracts research

PUBMED ID PMID:

MEDLINE DATE:

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Indoor air

VOLUME: 18

Page Numbers: 293-300

Journal Abbreviation:

ISSN: 1600-0668

DAY: 15

MONTH: 04

YEAR: 2008

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9423515

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Keywords Mesh Terms:

KEYWORDS:

MESH TERMS:

Chemical & Substance for Abstract: An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms.

AFFILIATION: Medical Science - Occupational and Environmental Medicine; and Department of Medical Science, University Hospital Uppsala, Uppsala, Sweden.

Country: Denmark

AGENCY:

GRANT:

ACRONYM:

MEDLINETA: Indoor Air

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms Related Publications

• Adverse biochemical and physiological effects of prostacyclin in experimental brain oedema.
• An experimental study on effects of increased ventilation flow on students' perception of indoor environment in computer classrooms.
• Anti-TNF therapy in the treatment of ankylosing spondylitis: the Finnish experience.
• CSF 5-HIAA and DST non-suppression -independent biomarkers in suicide attempters?
• Chlorinated-solvent-free gas chromatographic analysis of biomass containing polyhydroxyalkanoates.
• Determination of pH or lactate in fetal scalp blood in management of intrapartum fetal distress: randomised controlled multicentre trial.
• Effects of different types of weight-bearing loading on bone mass and size in young males: A longitudinal study.
• Effects of fibrinolytic inhibitors and heparin on induced intravascular coagulation.
• Estrogen receptor gene polymorphism, but not estradiol levels, is related to bone density in healthy adolescent boys: a cross-sectional and longitudinal study.
• Factors of importance for work satisfaction among nurses in a university hospital in Sweden.
• Hair transplantation. The use of hairbearing compound grafts for correction of alopecia due to chronic discoid lupus erythematosus, traumatic alopecia, and male pattern baldness.
• Insulin, intracerebral glucose and bedside biochemical monitoring utilizing microdialysis.
• Intramedullary Ender nailing combined with Parham's modified band in the treatment of subtrochanteric femoral fractures. Report of four cases.
• PET analysis indicates atypical central dopamine receptor occupancy in clozapine-treated patients.
• Postpubertal development of total and abdominal percentage body fat: an 8-year longitudinal study.
• Predictors of nurses' perceptions of barriers to research utilization.
• Proteinase inhibitors in thoracic surgery.
• ROC analysis of dexamethasone suppression test threshold in suicide prediction after attempted suicide.
• Renographic and autoradiographic studies during rejection in canine renal allografts.
• Retinol, retinol-binding protein 4, abdominal fat mass, peak bone mineral density, and markers of bone metabolism in men: the Northern Osteoporosis and Obesity (NO2) Study.
• Sex differences in the serotonin 1A receptor and serotonin transporter binding in the human brain measured by PET.
• Sick building syndrome in relation to air exchange rate, CO(2), room temperature and relative air humidity in university computer classrooms: an experimental study.
• The first year as a graduate nurse - an experience of growth and development.
• The pattern of immunoglobulins with special reference to IgM in Legionnaires' disease patients during a 2 year follow-up period.
• Treatment of periarticular calcification after total hip arthroplasty.
• Vitamin B12 deficiency after partial gastrectomy.
• Vitamin D receptor gene polymorphism is associated with birth height, growth to adolescence, and adult stature in healthy caucasian men: a cross-sectional and longitudinal study.
• Vitamin D receptor gene polymorphism is related to bone density, circulating osteocalcin, and parathyroid hormone in healthy adolescent girls.
• [Aids for patient information]
• [Tissue expansion]