Different types of windows can be used to have a beneficial impact on the interior temperature of a home. Double-hung windows serve as a barrier against exterior heat and cold. Garden windows create warmer well-lit places for growing plants. Bay and bow windows capture the sun in useful ways by having a mixture of window orientation due to their design.

Considerations about the interior temperature include orientation for seasonal differences, shading properties for summer months, warming properties for winter months, and increasing interior sunlight without increasing heat.

Window Orientation

Houseplants love the sunlight coming through southern-facing garden windows. However, windows with a southern exposure naturally bring the most heat into a home. During the summertime, to reduce the needs for air-conditioning, southern facing windows benefit from having window coverings that reduce the heat coming through the windows. The opposite is true during winter time. In the colder months, having more heat coming through southern-facing windows is beneficial and reduces the amount of energy needed to heat a home.

Windows that face toward the east or the west get more exposure to sunlight and bring in more of the outside heat during the early mornings and the later part of the afternoons. To let in the least amount of heat during the year, having large windows that face north is the best orientation for the main living areas. Northern facing windows help these areas stay comfortable during all the seasons. Bay windows that are installed with a northern orientation are good choices for this reason. They let in plenty of light but do not increase interior room temperatures as much as windows that face other directions.

Window Shading

Window shading comes from having special glazing that lets light in and at the same time reduces heat transmission. Different types of window shading can be chosen for windows placed to reduce the heat during summer and for others that are placed to increase the heat transmission for winter. Another helpful option is to use shutters that can be closed when desired to block out the sun and opened when desired to let the sunshine in.

Also, consider exterior landscaping and natural shade from trees when trying to determine the impact on the interior home temperature from window placement. These natural barriers can help block the sunlight that comes through the windows.


The experts at Window World Western Chicago, serving the metro area, are very helpful when making decisions about how new window installations will impact the interior temperature of a home. They understand the impact of orientation in regards to seasonal differences and make recommendations based on in-depth knowledge of the energy-efficiency ratings of replacement windows. Schedule a free in-home estimate to have all your questions answered about the benefits of new window installations.