As fall weather rolls in across the country, Infinity’s windows and patio doors made from durable Ultrex® fiberglass resist expansion and contraction from dropping temperatures – so they operate smoothly, keep weathertight, and remain virtually maintenance-free for the life of the window. We invite you to learn more about how we perform.

  • Weathertight — provides year-round comfort wherever you live.
  • Super Durable Ultrex Fiberglass — the ideal window material means virtually no maintenance for you.
  • Energy Efficient — ENERGY STAR® qualified products mean you can save money.
  • Better Looking — thoughtful design and traditional detailing not found in other replacement windows.
  • No-hassle shopping experience — from a reputable local installing retailer.
  • Easy to Clean — advanced designs make cleaning worries a thing of the past.
  • Limited Lifetime Warranty* — brings you peace of mind.
  • Founded by Marvin® Windows and Doors — an industry leader for nearly over a century

When customers choose Infinity from Marvin replacement windows they are getting windows that are Built for Life!  Infinity windows will make a room stand out like never before. There is also the benefits of energy efficiency thanks to the different glass options to choose from. With energy costs constantly fluctuating, it may be important now, more than ever, to invest in Energy Star Rated windows.   Do it once and never have to do it again.


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Don't go the route of “finding a great deal”, only to discover cheap is expensive in the long run. Let us provide you with the best quality windows and the best quality workmanship.

infinity from marvin denver window installation

That's why Gravina’s Window Center of Littleton is the best choice for windows for your home.

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*DISCLAIMERS, LIMITATIONS, AND ADDITIONAL TERMS AND CONDITIONS Disclaimers. This Limited Warranty is the only warranty, written or oral, express or implied, provided by Infinity. No dealer, employee, or agent of Infinity, nor any third party, may create or assume any other liability, obligation, or responsibility on behalf of Infinity. ALL IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED. Any implied warranty which cannot be disclaimed under applicable law will be limited in duration to the shortest permissible term and, in any event, will not exceed the term of the applicable express limited warranty; the requirements for presenting any claim so affected will be as provided in this Limited Warranty. Any product or component not specifically subject to this Limited Warranty or another written Infinity product warranty is provided AS IS and without warranty. This Limited Warranty gives you specific legal rights and you may also have other rights, which may vary from state to state. THIS WARRANTY IS NOT A WARRANTY OF FUTURE PERFORMANCE OR A STATEMENT OF THE USEFUL LIFE OF ANY INFINITY PRODUCT, BUT ONLY A WARRANTY TO REPAIR, REPLACE, OR REFUND. Limitations IN NO EVENT WILL INFINITY BE LIABLE FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES. IN NO EVENT WILL INFINITY’S LIABILITY EXCEED THE PRICE PAID FOR THE AFFECTED PRODUCT OR COMPONENT. The limitations of warranty and liability set forth herein shall survive and apply, even if the exclusive remedy set forth in this Limited Warranty is found to have failed of its essential purpose. Certifications and Ratings Many standard Infinity products are labeled with the Window & Door Manufacturers Association (WDMA) Hallmark Certification. WDMA Certification is based on the performance of a single sample of the product at the time of manufacture. Many standard Infinity products are labeled with National Fenestration Rating Council (NFRC) ratings. NFRC ratings are based on a combination of computer simulations and physical testing of product samples. Certifications and ratings apply to single products only and do not apply to mulled or combined products. Performance of individual products may vary and will change over time, depending upon the conditions of use.