Measurement of Infiltration Rates from the Daily Cycle of Ambient CO2

Determining of the role of ventilation in residential energy demand reduction using a heat-balance approach

“…The HHB method has been demonstrated to provide indicative estimates of ACRs that are useful for creating more complete energy demand reduction analysis that can be individualised for a household through the use of monitoring data. Both the significance and the variability of ACR on energy consumption was demonstrated, underlining the need for its evaluation (Fabi et al, 2012;Carrilho et al, 2016).…”

“…Interest in the assessment of ventilation began in the 1930's and remains the subject of contemporary research (Persily, 2016;Carrilho et al, 2016;Gough et al, 2018), however the spotlight typically falls on the measurement of ventilation rate, rather than the impact of ventilation on energy demand. Common measurement techniques include the blower door test (Lipschultz, 1981;Coxon, 2013), the use of tracer gas (Marley, 1935;Warner, 1940;ISO, 2012), and more recent approaches such as steady-state analysis of CO 2 concentrations (Persily, 1997;ASTM, 2012).…”

“…Common building simulation tools are known to be limited when modelling naturally ventilated buildings where the occupant plays a significant role in determining window operation, effecting the reliability of energy consumption estimates (Carrilho et al, 2016;Yu et al, 2011). None of these methods are practical to implement in residential buildings en masse and all have limited capacity to accurately represent the air flow in real buildings even with lengthly calibration procedures.…”