What is the best way to compare windows?

There is only one reliable way to compare windows and that is by asking for the NFRC* rating for each window that you are considering. NFRC labels are independently certified and rate the whole window performance by U-Factor and Solar Heat Gain Coefficient (SHGC). The lower these ratings are the better the window will perform. The priority of U-Factor versus SHGC depends on your climate. You should ignore all the sales hype and choose the best NFRC ratings for your climate at the best cost.

Does The Window Source have Energy Star windows and doors?

Yes, any window or patio door ordered with a LowE glass upgrade will qualify for the Energy Star guidelines for the climate zone where purchased. This guarantee always comes in writing on your contract specifications so you will be assured of ordering and receiving the best LowE glass that is optimized for your particular climate zone.

Are tax credits available for windows and doors?

Yes, you may be eligible to receive a 10% federal tax credit up to $200 for windows and $500 for doors that meet Energy Star guidelines. These credits had expired in 2011 but the new law, "The American Taxpayer Relief Act of 2012" has extended these tax credits to the end of 2013 and retroactively for 2012.

How can The Window Source be so much more affordable than other companies?

The Window Source provides you with extremely affordable prices on premium vinyl windows because of our large national buying power. Also our low prices and easy purchasing process allows us to be extremely efficient and pass the savings along to you.

Is the installation as important as the window?

Yes, a window needs to be properly measured to fit the opening and allow adequate tolerance for pluming and squaring the new window. If the new window is not properly plumbed and squared it will not seal and operate properly no matter how good the quality of the new window.

Energy Saving Windows | The Window Source of Rhode Island

Our windows are built to resist the heat and cold, offering four-season comfort. This not only keeps you comfortable, but also saves you money through energy savings. Need proof? We meet or exceed the current standards for ENERGY STAR® Version 6.0 requirements in all 50 states and can exceed requirements for the Northern Zone, by up to 48% with select glass packages. Below are four common ratings that are provided for windows certified by the National Fenestration Rating Council (NFRC).

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 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.

All Energy Miser Options Are UV Resistant

Harmful UV rays can do more damage to your home than you might think. For example, if you don’t use the proper precautions on your windows, these rays can fade valuable items you have inside your home. Our UV resistant windows can act as a sunscreen for your house, blocking damaging ultraviolet rays without noticeably reducing the light coming inside. The Low-E coating options on our windows increase window performance and help to significantly reduce fading and sun damage to your furnishings, carpets and floor, so they stay colorful and beautiful. All of these energy saving features will save you money!

uv ray on windows — Clear insulated glass can block some UV rays

window bouncing uv rays to save energy — Low-E insulated glass can block the vast majority of UV rays

Call The Window Source Today For A Free Estimate!

401-270-0160

Online Estimate

See What Our Customers Are Saying About Us

Second time using this company and both times had an excellent experience. Bob and crew installed 8 windows and were in and out with in 2.5 hours. I would recommend this company and this crew to anyone looking for windows

Patrick Fogarty

Bob's team were friendly and professional. They worked so well as a team. I'm proud to say Window Source replaced all my windows. Thanks to Bob and his team,for a great job. June

June Figureid

I couldn’t be more happier with the installation and service received from Window Source! The installer was professional and did a wonderful job! They were efficient and friendly! The front office were wonderful to deal with! Thank you on behalf of the Fairbanks family!

Ed F.

From initial visit and measurements, to installation completion, all very professional. Very satisfied with work. Installation crew was timely, work done to specifications and clean up was thorough.

Bill H.

The team at window source made the entire process very easy and straightforward. Highly recommend their services, pricing was fair and more than worth the quality of product and service. I’d give 10 stars if I could!

The Window Source of Rhode Island

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Energy Saving Glass Installation in Rhode Island