Not many homeowners think very much about this, but homes today are built with energy efficiency in mind. This means that construction is tight, as to not allow any conditioned air to escape. Factors like proper insulation, weatherstripping, and keeping your doors and windows closed when you run your HVAC system help with this as well.
However, the latter doesn’t do much good if you need window replacement service. Drafty windows or older windows that are losing their seal can result in your losing out on a lot of your conditioned air. This means during the winter you may keep turning your thermostat up to make up for the cold air entering your home and the warm air leaving, and pay for energy that you shouldn’t even have to. But how do you know if your home actually does need window replacement?