How do I choose replacement windows if energy efficiency is a priority?

It was also important for us to find windows that would reduce our heating costs. We chose the option of windows replacement mississauga from the team at https://windowtechcanada.ca/windows-and-doors-mississauga/ . They have a huge selection of energy efficient windows on their website to suit all tastes and budgets. These windows are made with double glazing and argon gas, which is great for retaining heat. If you have cold winters, this is a big plus - I advise you to pay attention to such technologies.