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Zachary Merrin, University of Illinois at Urbana-Champaign
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Michael Lubliner, Washington State University Extension Energy Program
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Paul W. Francisco, University of Illinois at Urbana-Champaign
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Brennan Less, Residential Building Systems Group, Lawrence Berkeley National Laboratory
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Iain Walker, Ph.D., Lawrence Berkeley National Laboratory
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Installation of continuous mechanical ventilation in residential buildings is becoming more commonplace, and is the primary mechanism by which compliance with ASHRAE Standard 62.2 is achieved. However, a common objection to this practice is that continuous mechanical ventilation may cause excessive ventilation at more extreme outdoor conditions when the cost of conditioning ventilation air is highest. The physics of stack-based infiltration are consistent with this concern, since at more extreme outdoor temperatures natural ventilation is highest. Therefore, there has been an interest in developing automated controls that account for outdoor temperature to adjust ventilation rates while still meeting core indoor air quality targets. Recent work done through a partnership of Building America teams PIRC and PARR with Lawrence Berkeley National Laboratory has demonstrated the potential for a simple control to achieve this goal. This work included modeling of energy use and indoor air quality, along with field measurements of the performance of the prototype control and resulting IAQ metrics in pilot homes. This paper presents the results of this work.
