AIVC - Air Infiltration and Ventilation Centre

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thermal comfort

Indoor environment for hotels.


Demand-controlled ventilation - an alternative to unnecessary air conditioning. Tarpeettoman ilmastoinnin vaihtoehto - tarpeenmukainen ilmanvaihto.

Good indoor air quality and thermal comfort and good energy-efficiency can be achieved simultaneously only if the amount of ventilation can be demand-controlled. Two approaches are discussed in the article: CO2- control and use of so-called air quality sensors. The first experiments have been promising but further development of equipment is still needed, in order to improve the reliability and economy of demand-controlled ventilation.

The assessment of thermal comfort in dwellings with evaporative cooling.

Describes approach based on the Predicted Mean Vote concept as a suitable index of discomfort for housing with evaporative cooling. This index accounts for all important environmental factors and in addition allows dynamic modelling of human responses to the thermal environment, such as adjusting clothing levels and metabolic rate. The computer program TEMPAL is used to predict internal environmental conditions within a dwelling. TEMPAL is shown to be sufficiently accurate for this purpose by comparing predictions with monitored conditions.

Development of measurement equipment for the determination of indoor climate. Entwicklung eines messgerates zur ermittlung der physikalischen raumklimabedingungen.

Describes automatic equipment for measuring thermal comfort based on resultant surface temperature, convective heat flux density, air temperature and relative humidity. Results obtained in an environmental chamber are presented and evaluated.