Final answer:
The question relates to building code requirements for window glazing area in bathrooms, typically at least 3 square feet, half of which must be operable. The information about a hypothetical house concerning heat loss does not directly address this question.
Step-by-step explanation:
The question pertains to the requirements for natural light and ventilation in residential buildings, specifically concerning the minimal size of window glazing in bathrooms or similar rooms. According to building codes, which may vary by location, there is often a required glazing area in windows to ensure sufficient natural light and ventilation. One commonly cited requirement is that bathrooms should have a minimum of 3 square feet of window glazing area, with at least one-half of this being operable to allow for ventilation. This means that of the total glazing area, at least 1.5 square feet must be able to be opened.
In the context provided, each window has an area of 2 m². This does not directly answer the question regarding bathroom windows since the provided information is about a hypothetical house with no specific mention of bathrooms or their window sizes. Moreover, the glazing area required for bathrooms in terms of natural light and ventilation is unrelated to the heat loss measure calculation provided in the scenario.