I have two units. Both are 50m2. The first has 10m x 3m (width x height)of exposed facade comprised of 50% glass at R-3 and 50% wall rated at R-30. The second has only 5m of exposed facade but it is entirely 100% glass at R-3. Which one will be more energy efficient?
I’ve asked a few people and have had different takes. Some believe that because the R-value will be higher in the first unit it will be more energy efficient. However, since the second has less exposed facade, I have also had some believe that it is more energy efficient.
Any experts care to weigh in???