The Window Source of Raleigh offers windows and patio doors that are made to resist harsh temperatures while also offering four-season comfort and energy savings. This saves you money over the course of the product’s lifetime while also keeping your house warm.
Need proof? We surpass the ENERGY STAR® Version 6.0 standards for our climate zone by up to 48% with specific glass packages. The National Fenestration Rating Council (NFRC) accredits windows and offers the four standard ratings listed below:
- U-Factor – A measure of the rate of heat flow through a window. A lower U-Factor indicates a higher performing window that can help reduce heating and cooling costs.
- Solar Heat Gain Coefficient (SHGC) – The amount of solar radiation allowed to pass through a window. The lower the number, the less solar heat gain and UV rays the window permits to enter.
- Visible Light Transmittance (VT) – Ranging from 0 – 1, visible transmittance is a measure of how much light passes through the window. The higher the number, the more light that can pass through.
- Condensation Rating (CR) – CR measures how well a window resists the formation of condensation on the inside surface. CR is expressed as a number between 1 – 100.The higher the number, the better a product is able to resist condensation.
Energy Efficient Glass Ratings
| NFRC Ratings | U-Factor | SHGC | VT | CR |
| Energy Miser 2-IS | .22 | .24 | .38 | 53 |
| Energy Miser 2 | .25 | .24 | .40 | 64 |
| Energy Miser IS | .26 | .26 | .50 | 41 |
| Energy Miser | .30 | .27 | .51 | 52 |
| Clear (No LowE) | .49 | .59 | .61 | 38 |
*Air Infiltration ratings are ≤ 0.3 US (≤ 1.5 Metric) or better for all Window Source Windows.
Energy Miser glass options keep you warmer in the winter and cooler in the summer.
Our Energy Miser Options Are All UV Resistant
Unsafe UV rays can cause more damage to your property than you might think if you don’t take the correct precautions with your windows. For example, UV rays can cause valuable items in your home, like drapes, furniture, carpets, and rugs, to fade.
Our UV-resistant energy saving glass windows are like sunscreen for your house — they block dangerous ultraviolet rays without dramatically reducing the amount of light that enters. Thanks to the Low-E coating options on our windows, which enhance window efficiency and significantly lessen fading and sun damage, your home furnishings will remain colorful for years to come.
To find out how you can save money on energy saving glass windows, talk to one of our consultants about our options!
Call The Window Source Today For A Free Estimate!
Rameet Singh
My wife and I had a wonderful experience with Kim and the family of Window Source. She worked tirelessly on finding the perfect door for us and meeting all our specifications. The installation was seamless. We will definitely be working with them for future projects!
Brenda Wright
Window Source installed 10 windows in my condo. David Johnson, Kim, Tyasia and James were great to work with. James and his helper were so nice, professional and got the job done. I am thrilled with my new windows and excited to clean my windows again. I would highly recommend them.Brenda01/22/2021
Glynis Moinet
The Window source were great we love our new windows!!! Kim worked witin our budget and the communication was really good. James and the guys installed 15 windows in one day they were all very respectful and efficient. I would recommend Window source above other companies that I talked to!!!
Lynn Foster
The Window Source of Raleigh is my firm's #1 choice for our flip houses and for client referrals. The work has consistently been outstanding on numerous jobs they've completed and the customer service is top notch. Kim personally assures every project is handled professionally and with attention to detail. Window Source's prices...
Nicole Sarrocco
Kim's so responsive and easy to work with. Not only do my new windows look great, Kim made sure to involve the manufacturer of my home's walls so that these newly-installed windows would not void my warranty. Grateful for Window Source's care!
Lynn Hayes
I discovered late in renovating a house that I was going to sell that all of the windows needed to be replaced. I called a couple of companies that said it would be 10-12 weeks to deliver new windows but I had to get them as quickly as possible. I found Window...
Ella Bellovoda Corbett
Great company to work with. Kim is awesome. Very responsive and communicative. She managed the entire window replacement project from start to end. Their technician who installed the windows was probably the hardest working person I have ever met. He was quiet, courteous and very neat and clean.
Nan Clarke
This was an excellent service from start to finish. David showed me a sample of what I was purchasing and clearly explained the entire process. There was NO pressure with some special deal only good for that moment. I sat through three of those, so David's approach was refreshing and exuded honesty...
Kathryn Henry
We recently replaced all of our second floor windows of our townhome with Kim & team. From the first phone call to the final sign off, we experienced nothing but professionalism. They were available to answer all of our questions and help us decide what windows were right from us. After getting...
Roger Ericson
Had two sliding glass doors and ten windows replaced. Now my home is comfortable and I can actually see out the windows. They were a great price and James our installer was a true professional. Beautiful installation! Thanks again.Kim and her staff were always keeping me informed on my order. A great...
Tawna Gimborys
James and his crew were fantastic, Calvin was excellent with his trim caulking ( which is a pet peeve of mine) his was perfection! I will always use this company for installation and repair/replace and capping frame work! Great job guys!
Neal Bramson
Ordered a mahogany front door system in early March 2021. The first delivery in late August was not the sizes ordered. The correct order was finally delivered in early September. Throughout the entire process The Window Source dealt with the manufacturer and the delivery company. I believe that The Window Sources efforts...
Nick Pinkin
We had a great experience with the Window Source of Raleigh and would definitely recommend them for windows. The price was very affordable (especially compared to some other big names we got quotes from), the quote and scheduling process were simple and timely, and the windows were produced within the time frame...
Anthony Thornburg
Tim and his guys were verry professional, did a wonderful job installing new windows, on time and very professional, the installers were very good, cleaned up and did a wonderful job, thanks Tim
Brenda Ruffin
The Window Source of Raleigh installed 79 windows at our small complex. We, residents and staff, are very pleased with quality of the windows and workmanship of the installers. Thank you, Kim, David, James and the crew.