*4.3.1. Air temperature*

The temperature thermostats were possibly set too high in SP1. It is possible that the Ta re‐ corded for SP1 House A would have been considerably higher if the occupants had not opened the windows in the bedrooms so frequently. The need to naturally ventilate to dif‐ ferent degrees between House A and House B, but with similar temperature outcomes, sup‐ ports the observation of a difference in IAQ between the two houses. Likewise, it can be assumed that the thermostats in SP2 were set too low, resulting in one of the occupants al‐ tering the settings in House B to compensate. This evidence further identifies a difference between House A and House B. Whether the difference in Ta is due to construction type, a variation in MVHR system or a study limitation, the unacceptable Ta experience highlights the need for a greater degree of occupant control in order to achieve the ideal sleeping tem‐ perature.
