Energy Efficiency - Infinity from Marvin

Energy Efficiency


Ultrex® fiberglass is far less thermally conductive than aluminum (500x less!) and insulates much like wood. This means that Ultrex provides an insulated barrier against extreme weather temperatures, keeping your home comfortable, and helping to reduce heating and cooling costs.

Glazing Options

We know how important energy efficiency is, and our standard LoĒ2-272® glazings are a simple means of maximizing your home’s thermal efficiency. LoĒ2-272 reflects heat back to its source so summer heat is reflected outdoors and winter indoor heating is retained. At the same time; up to 84% of the sun’s UV rays are screened to reduce fading and damage to upholstery and carpets. Argon gas and warm edge spacers are also standard features.*

Our optional LoĒ3-366® glass provides increased performance, especially in high sun exposure locations. This top-performance glass is formulated to reject solar heat while letting light in. With LoĒ3-366 glass, light and visibility are maximized, up to 95% of the sun’s damaging UV rays are blocked, and most importantly, you and your home stay cool and comfortable year round.

Summer sun is filtered and reflected back outdoors.
In the winter, indoor heat is reflected back into the home.

As our highest performing glass, LoĒ3-366/i89® combines the energy efficiency and UV protection of LoĒ3-366 while adding LoĒ3-i89® - an inside surface coating that reflects escaping heat back into the room. As an excellent solution for both the summer’s heat and winter’s cold LoĒ3-366/i89 provides comfort and increases energy efficiency.

* 0.55 is the default glazed fenestration U-Factor for a double pane nonmetal frame window from IECC 2012 Table CC303.1.3(1).
Benefits of LoĒ3-366/i89
  • LoĒ3-366/i89 exceeds the most stringent energy standards without going to triple-pane glass.
  • No haze or distortion often found in competitors LoĒ and triple-pane options to mar the view.
  • Room side LoĒ3-366/i89 glass surface is smooth and easy to clean.



Infinity from Marvin® exceeds the performance requirements for energy reduction set down by the U.S. Department of Energy and the U.S. Environmental Protection Agency in their Energy Star ratings. And, Infinity qualifies for the Energy Star rating in all U.S. climate regions.


The not-for-profit National Fenestration Rating Council sets standards for the window and door industry. Infinity earned one of the highest possible ratings for energy performance. The ratings measure light transmission and heat loss or gain under varying conditions.


Replacing your windows with Infinity from Marvin is a long term investment in your home that will start paying dividends immediately and will continue to save you money long-term.

  1. Replacing your windows with energy efficient Infinity products may qualify you for up to $500 in federal tax credits. For more details on qualifying for the Energy Tax Credit, visit our Tax Credit page.
  2. Replacing your windows with ENERGY STAR approved Infinity products with LoĒ glazing can reduce your heating and cooling bill by up to 30%**.
  3. Should you ever decide to sell your home, you can expect to recover a significant portion of the cost of your window replacement project in the form of a higher selling price. Remodeling Magazine performed a study that indicates most homeowners will recover over 75% of their replacement window project cost when they sell their home. To view more details, visit the Remodeling Magazine Cost Vs. Value Report.

An immediate tax credit combined with long-term energy savings and an increased resale value for your home make replacing your old, inefficient windows with Infinity from Marvin a sound investment in your home and your comfort.

*Exceptions are made for high elevation applications.

**Estimated savings are based on data set forth in the Window Selection Tool of the Efficient Windows Collaborative, available at Actual savings will vary by product type, location, method of installation, individual home characteristics, local climates and conditions, utility rates, and other factors.

* Minimum order required. Contact retailer for details.
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