What is the NFRC?  The National Fenestration Rating Council is the governing body that provides information on how a window performs.  The two most important energy ratings are U-factor and Solar Heat Gain.

U Value is the amount of heat transmitted by the window.  The lower the number, the more efficient the window is in reducing winter heating cost.

Solar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from the sunlight coming through the glass.  The lower a window’s SHGC, the less solar heat it transmits.

The overall window performance that NFRC has completed on Vinly Kraft Windows, Double Pane eK2 Glass With Argon Gas Fill and the Super Spacer = U Value .28 and SHGC Value .28

The overall window performance that NFRC has completed on Vinly Kraft Widows, Double Pane eK366 Glass With Argon Gas Fill and the Super Spacer = U Value .28 and SHGC Value .21

To learn more about the NFRC and windows in general you should visit their website.

EPA Certified Renovator

Please join us in congratulating David Lawrence for obtaining his Certification for Renovation, Repair, and Painting as conferred upon him by University of Tennessee Knoxville, Environmental Health and Safety Office and the EPA.

The Certified Renovator Training Skills Assessments involved 11 different areas in which the student had to demonstrate proficiency in completing and were consistent with the requirements of the EPA and the RRP Rule. 

The RRP Rule states:  Firms working in pre-1978 homes and child-occupied facilities must be certified and use lead-safe work practices during renovations.

Credit Cards and Financing

Manning Windows is pleased to announce that we now have the ability to take your credit card payment.  We of course will still take your check and be happy to do so.

We are also happy to announce that we have entered into agreements, with two finance company’s here in Knoxville and would be happy for those who want to pay for their windows monthly, can now do so.  We have options for most anyone looking to purchase their new replacement vinyl windows.  “Same As Cash” with approved credit (90 days – 6 months – 12 months) for those who like to use other peoples money for their purchases.  There are also longer terms available with approved credit.


Home Builders Association of Greater Knoxville (Home Show 13)

We are pleased to announce Manning Windows LLC will be participating in the HBAGK HOME SHOW 13 this year.  This years event will be March 15-17 at the Knoxville Convention Center.  For more information you can go to 

I have 2 tickets available for the first person to call 865-755-4100 or email me

What would you say to a window that cleans itself? We now offer windows featuring Cardinal Glass Industries’ Neat Glass technology. With this “wonder glass,” the sun’s UV rays loosen dirt and rain washes it away. It’s as simple as that.  If you purchase your windows during the month of March or register at our display at the Home Show, we will give this you this new feature FREE!

Getting Started

Convenience & Durability

Regardless of where you live, choosing your windows is one of the most important decisions you’ll make as you remodel your home.  And choosing the right window company for your home should be the most important factor in that decision.  Why?  When you choose the right windows, they can provide years of comfort and beauty while saving you hundreds of dollars on your energy bills. 

Vinyl Kraft windows by Manning Windows LLC will bring convenience and durability to your home.  Available with different glass options, colors, and superior designs, Vinyl Kraft windows are safe, secure, and energy efficient.  These windows help reduce noise and add a protective reinforcement from outside elements.

Size and Type

All of our windows are custom made to create windows based on your needs.   You are probably aware that windows come in various styles and each type has specific installation requirements.  At Manning Windows we make sure that our clients are fully informed of the process from start to finish.  At Manning Windows our difference maker is our installation professionals who have 30 years’ experience.


Vinyl Window are extremely resilient and are built to last: they will not corrode, swell, chip, peel, rot, or rust.  Vinyl windows are priced to accommodate every budget and are easy to customize.  Vinyl windows provide durability, require low-maintenance, and improve energy efficiency in your home.


Typically, first floor windows have lower installation prices than higher floors.  Windows on higher floors require more time for installation and can be more difficult to access.  Sometimes we will have to use special equipment to reach these windows, and that can contribute to higher window installation costs.


Replacement windows not only provide aesthetic beauty to your home both inside and out, they also provide important functions.  They keep your heating and air conditioning where it belongs, inside your home!  These updates can be done cost effectively and save you on your future energy bills.  You may also qualify for up to a $500 rebate on your windows.

There’s a Lot That Goes Into A High-Quality Window

At Manning Windows, we’re committed to providing you with the best possible replacement windows with the best possible service at the best possible price. Ultimately, your satisfaction will depend on four critical factors: 

  • Appearance.The window must look good.In a sense, this is the easiest requirement to verify because you will see right away.
  • Insulation. Your utility bills will tell you whether your new windows are doing a good job. You should have more money in your pocket as your new windows keep in the warm air during the winter and the cool air during the summer.
  • Cleaning. You shouldn’t have to be an acrobat just to clean your windows. In fact, many styles allow you to clean them easily, inside and out, from within your home.
  • Durability. Windows are a major purchase, and they should last many years. If new windows don’t come with a proven track record and a strong guarantee, don’t buy them.


We won’t install a window if it doesn’t rank high in all these criteria. And we don’t make you take our word for it, either. Here are some of the most important programs and technologies we embrace to guarantee you have a good experience.

TVA Preferred Partners Network.Manning Windows is proud to participate in the Tennessee Valley Authority’s Preferred Partners Network, a group of highly trained, highly motivated general contractors, architects, engineers, and others who are dedicated to helping you make your home as energy efficient as possible.

By including us in the program, TVA is telling you that you can trust the knowledge we bring to your project and the work we do on it. On top of that, the program qualifies you for a TVA rebate of up to $500 on your windows.

Let us repeat that: You can get a rebate from TVA of up to $500 when you have Manning Windows install your new windows. Contact us for details. 

National Fenestration Rating Council Certification.

Vinyl Kraft windows are certified with the NFRC. That means they have been rated by some of the world’s leading experts in window performance.When you purchase certified windows, you ensure you are getting a high-quality, high-performance product. The council operates a uniform national system for rating the thermal performance of windows, no matter who the manufacturer.

For more information visit the website

Energy Star.

The Energy Star program is a joint effort of the Environmental Protection Agency and the Department of Energy. By qualifying for the Energy Star, Vinyl Kraft windows can save you about a third on your energy bills.

For more information visit the website

EPA Certified Lead-Safe.

Homes built before 1978 run the risk of having lead paint on the walls. As a result, any walls that will be disturbed by a window installation must be tested for lead paint.

Manning Windows is certified by the Environmental Protection Agency to test for lead paint and take whatever precautions are necessary to protect your family’s health. We provide these services at no charge to you.

For more information visit the website

Super Space Sealed Health Smart Windows.

Great glass is only one consideration when you look for replacement windows. Just as important is the seal that holds the glass in and the weather out.

Manning Windows uses Super Spacer Sealed Health Smart Windows with the Super Spacer all-foam spacer system. What that means for you is that your windows will have:

  • Greater thermal performance 
  • More reliable mold prevention
  • Better dampening of outside noises
  • Greater durability


For more information visit the website

Vinyl Kraft windows qualify for the Department of Energy’s R5 program, which is focused on bringing highly efficient triple-pane windows to the market at a reasonable price.

Neat Glass.

What would you say to a window that cleans itself? We now offer windows featuring Cardinal Glass Industries’ Neat Glass technology. With this “wonder glass,” the sun’s UV rays loosen dirt and rain washes it away. It’s as simple as that. 

For more information visit the website