ZEMCH 2015 - International Conference Proceedings | Page 232

Methodology
A Post Occupancy Evaluation (POE) has been carried out as a main methodology using the case
study Villas del Pedregal development from Morelia. The thermal performance assessment involved a long-term seasonal monitoring of the indoor climatic conditions (air temperature and
relative humidity levels) of 12 selected houses, where three dwellings per orientation were chosen; facade facing North, East, South and West. All monitored dwellings were occupied by families
and none of them have air conditioning or any type of space heating systems.
HOBO U10-003 data loggers (Fig.6) were used as a monitoring instrumentation, complying with
the ranges and accuracy levels specified on Table 2 of Standard ISO 7726 (1998) for measuring the
physical variables of the environment. The operating ranges of these data loggers are -20° to 70°C
for temperature, with a resolution of 0.02°C, and a 0 to 95% for Relative Humidity, with a resolution of 0.1%. Accuracy for temperature is ± 0.4°C from 0°C to 40°C, and for RH ± 3.5% from 25% to
85% over the range of 15°C to 45°C, ± 5% from 25% to 95% over the range of 5°C to 55°C. The time
accuracy is ± 1 minute per month at 25°C (HOBO, 2010).

Figure 6: Data-logger Onset HOBO U10-003 used for monitoring
The monitoring was carried out during 42 consecutive days (six weeks) in two seasons: the cold
period from the 17th of December 2008 to the 27th of January 2009 and the warm period from the
11th of May to the 21st of June 2009. The chosen periods were determined by the weather analyses of the region identifying the months that presented the most extreme conditions during the
year. Two data loggers were used on each house, collecting data from the bedroom and the living
spaces (kitchen, dining and living room) where the residents spend most time. Figure 7 shows the
design and distribution of the house, and location where the instrumentation was installed. The
recordings of air temperature and relative humidity were set at 10-minute intervals. As a result,
the housing monitoring generated a detailed database of the indoor environment with a total
number of 580,608 readings from both seasons.

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ZEMCH 2015 | International Conference | Bari - Lecce, Italy