According to the study, how did the 5-Star homes energy use performance compare with lower rated homes in the winter months?

Question

BlackTom AI · Accepted Answer

First, let's restate the question and options to be clear about what's being evaluated in the winter months.
Question: According to the study, how did the 5-Star homes energy use performance compare with lower rated homes in the winter months?
Options:
- a. They were more efficient
- b. Their efficiency was about the same
- c. They were less efficient

Now, evaluating each option individually:
Option a: 'They were more efficient.' This statement aligns with the typical finding that higher-rated (5-Star) homes tend to have better energy performance, especially in cold conditions where insulation, air sealing, and efficient systems reduce energy use. The language suggests a relative improvement in performance compared to lower-rated homes.
Option b: 'Their efficiency was about the same.' This would imply no meaningful difference between 5-Star and lower-rated homes in winter, which contradicts common energy-performance trends that emphasize rating-driven improvements. If the study showed a notable difference, this option would be inconsistent with that implication.
Option c: 'They were less efficient.' This would mean higher-rated homes performed worse in winter, which is counterintuitive to standard energy-performance expectations and any study designed to compare rated versus lower-rated homes in terms of energy use.

In summary: Option a presents the logically expected outcome that higher-star homes use energy more efficiently in winter, while options b and c describe equal or worse performance, which would generally conflict with how energy ratings correlate with winter energy use. The distinction rests on whether the study reports a performance advantage for 5-Star homes in winter, which option a captures, whereas b and c describe no advantage or a disadvantage respectively.

ME Mod4 Intake 4B - 10 Nov 2025 - 30 Jan 2026

According to the study, how did the 5-Star homes energy use performance compare with lower rated homes in the winter months?

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