AIVC - Air Infiltration and Ventilation Centre

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Evaluating and improving the environmental quality of building products with EQuity - some example applications.

The EQuity model is a Life Cycle Assessment-based tool aimed at evaluating and improving building products Environmental Quality aspects. Unlike most "classical" LCAs, EQuity is strongly based on users' statements about their perception of environmental quality, as well as their goals and constrains pertaining to a given product study. Two applications of the EQuity model are presented in this paper. They illustrate the benefits of the case-by-case approach.

Recommended ventilation strategies for new energy-efficient production homes.

The U.S. Environmental Protection Agency is seeking to improve the thermal quality of newhomes, most of which are being built in the sunbelt by large building development companies.Low-infiltration production (tract) homes need ventilation systems that satisfy the low-costpriority of the builders as well as the safety, health and low operating cost expectations ofhomeowners.

A thermal sensation prediction tool for use by the profession.

As part of a recent ASHRAE research project (781-RP), a thermal sensation prediction tool has been developed. This paper introduces the tool, describes the component thermal sensation models, and presents examples of how the tool can be used in practice. Since the main end product of the HVAC industry is the comfort of occupants indoors, tools for predicting occupant thermal response can be an important asset to designers of indoor climate control systems. The software tool presented in this paper incorporates several existing models for predicting occupant comfort.

A field study of office thermal comfort using questionnaire software.

Custom software to automatically administer questionnaires on computer screens was installed on computers in four open-plan offices. Five questions related to thermal comfort were presented twice per day for three months. Results indicate that this new method of subjective data collection was successful and efficient: the participants had few complaints about the method of questionnaire delivery, and a substantial literature review demonstrates that our results are comparable with results from other field studies of thermal comfort conducted using different methods.