According to Energy Star, drafty windows can allow 25% of your home’s energy to escape. This makes it even more important that you choose windows that have low air infiltration ratings and combat against drafts.

If you’ve never heard how air infiltration can impact the energy efficiency of your windows, these are the facts that you need to know:

What is Air Infiltration?

There are hundreds of areas in your home where energy can escape. This includes gaps and holes in wiring, plumbing, ducts, and yes—windows and doors.

Air infiltration is the process of energy escaping through various points of your home, although we are specifically referring to windows in this instance. This is a big component of your home’s thermal envelope, which is the overall system that regulates indoor temperature and prevents energy from escaping.

Where Does Energy Escape Through a Window?

When a window is improperly installed, there are various areas where energy tends to escape. These components of the window include:

·       The sash

·       The sill

·       Where the sash meets the rail

·       The sash perimeter

When air is making its way through one of these entry points, you’ll feel it in both your home and your pocketbook. This is especially the case with colder weather arriving.

How Can You Reduce Air Infiltration Through Your Windows?

It’s important to know that there is no such thing as a window with zero air infiltration. This is measured in units of cubic feet per minute by the square foot of the frame area. The only product that can completely block airflow is a solid wall.

You’ll find a window’s air infiltration rating on the Energy Star’s certification sticker. This rating must be .30 or less.

While choosing a product with a good air infiltration is best (you want the lowest number possible), professional window installation can help. An experienced window contractor can correctly install the window and create an airtight seal. This can dramatically cut down on drafts in the home and increase its efficiency.

Other Ways to Increase Window Efficiency

While air infiltration rating is important, there are other factors to consider for top energy savings. This includes:

·       Argon or krypton gas

·       Low-e application on the glass

·       Dual or triple pane glass

·       Professional installation

·       Energy Star seal of approval

Maximizing the energy efficiency of the home is priority for many homeowners. Choose Energy star certified windows with top ratings for a more comfortable home.