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Making the Most of Energy Efficient Windows

by Lauren Busser Direct from the Designers™ Editorial Director

When people think about saving energy they think about their HVAC systems and the appliances they use, but windows are just as important. In the last couple of decades, windows have undergone a technological revolution. Newer windows mean lower heat loss, less air leaks, and warmer window surfaces that improve comfort and minimize condensation.

If you live in a region with a significant cold weather season energy efficient windows will help protect you against a lot of unwanted heat loss. And remember that the inverse is also true. When it’s hot outside, energy efficient windows prevent unwanted heat gain.


This beautiful living room is flooded with natural light thanks for Integrity® from Marvin® IMPACT Double Hung Windows and Outswing French Doors.

Integrity from Marvin Windows and Doors IMPACT Double Hung Window and Outswing French Door

High performance windows not only bring down average annual heating and cooling costs but also reduce peak heating and cooling loads. Peak heating and cooling loads determine the maximum required specs for heating and cooling systems and thus dictate the size and cost of the furnace, heat pump or air conditioner and blowers that will be needed in a home. A reduced peak load allows a home owner or contractor to spec smaller, less elaborate HVAC systems. Smaller systems cost less and can offset some of the initial investment in energy efficient windows.


Placing a window high on your wall can maximize the light your space receives during the day. Here, Integrity® All Ultrex Polygon Windows work with a slanted ceiling to achieve a perfect fit. Paired with other windows at different angles this home is sure to get lots of daylight.

Integrity from Marvin Windows and Doors Polygon Windows

Natural light, archetectural beauty and the views they provide are compelling resons to install windows. Unfortunately they can be a prime source of unwanted heat gain particularly when it isn't needed or wanted. Previous efforts to combat this heat gain consisted of tinted glazing or shades that restrict the views and the amount of natural light allowed in. New window technologies such as Low-E coatings can provide better solar heat gain reduction than even tinted glass. With Low-E glass, your views will be clear and unobstructed while saving energy.


Get the best in energy-efficiency and stylish windows with Integrity® from Marvin's® Wood-Ultrex Casement Windows. These versatile windows come with the option of Tripane Insulated Glass with Argon gas for superior energy-efficiency.

Integrity from Marvin Windows and Doors Wood Ultrex Casement Windows

The glass that your windows are equipped with can be a big factor in your home's energy-efficiency. Insulated glass coatings are a popular way to do so. Insulated glass coating involve putting an extremely thin layers of metallic coatings between glass panes. The industry term for this is Low-Emissivity (Low E) glass. Low-E glass can block a significant amount of heat transfer and reduce your need to rely on an HVAC system. Depending on where you are building your new home you may need additional layers of Low E clothing depending on Climate Regions. In addition to Low E coatings, insulating gases are also being used in between window panes. The gases slow the transfer of heat and provide better insulating power.


All Integrity® from Marvin® Windows come equipped with a standard Low-E coating and argon insulating gas. Multiple layers of Low E glass are also available depending on your region.

Integrity from Marvin All Ultrex Casement

These technologies all help raise the performance of your home but considering where you orient your windows is another item to carefully consider. How your home is oriented in relation to the sun’s movements is something worth looking at. A common 'passive solar' technique is to place windows with overhangs on the southern facing side of your building to absorb the sun’s heat energy in the winter months when the sun is low. In warm months, the overhangs block the higher summer sun from shining directly in. You can consult your builder for more detailed information based on the positioning and geographical location of your house.


Integrity® from Marvin's® Wood-Ultrex Double Hung Windows come standard with insulating glass with Low E and Argon Gas to boost energy-efficiency.

Integrity from Marvin Windows and Doors

Investing in high performance windows is definitely something worth doing. They will save you money on your long-term energy bills. You can find them in a variety of shapes, colors, and sizes but they are also completely customizable. When deciding how to lay out the windows in your new home be sure to consult your builder about choosing windows that will best suit the energy efficiency needs of your home.

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