Whether it's a leak or a draft, when either of these issues show up, you have a window problem. The big question is how do you handle it.
Sealed window units aren't invincible. At some point, you'll need to repair or replace them. Up-to-date windows help reduce and keep your energy bill at an affordable rate.
Do you have faulty sealed window units? If so, you need to know whether to replace the glass or the whole window. Read this quick answer guide to help you make that decision.