Basic Window Performance and Energy Efficiency FAQs

 

Window replacement is a considerable task. To help homeowners decide on whether or not to replace your windows, Renewal by Andersen® of San Francisco has gathered some essential information that you should know about windows and visible transmittance, along with its impact on the window’s overall performance.

Q: What Are the Different Types of Windows?

Windows come in various shapes, sizes and materials. These are the most common type sof windows: sliding, casement, bay and bow, single- and double-hung, picture and specialty windows

Q: What are Some Basic Window Components?

The outermost part is the frame, and inside it are the sash and glass.

Q: What Materials Can Be Used in Window Frames?

Wood is a classic material, but it requires maintenance while vinyl is durable and affordable. Aluminum is low maintenance and good for noise abatement, but a poor insulator. Lastly, fiberglass, while it’s the most durable out of the four, looks like a typical PVC frame, but it is as expensive as wood.

Q: What Is Visible Transmittance (VT)?

According to window replacement experts like Renewal by Andersen of San Francisco, visible transmittance refers to the amount of visible light that passes through the glazing material of window glass.

Q: What Is Solar Heat Gain Coefficient (SHGC)?

It represents the amount of solar energy that is allowed through the window. In warmer climates, it’s better to have a low SHGC to block out heat gain in your home.

Q: What’s the Relationship between VT and SHGC?

A: With basic glass windows, the more VT or daylight that comes in, the more heat can also be expected to enter your home, making it difficult for those who live in warmer climates.

Q: How Can We Prevent This From Happening?

Luckily, products like Renewal by Andersen Low-E4® window replacement glass can minimize solar heat gain while still allowing visible light to pass through.

Trust Renewal by Andersen of San Francisco for all your window needs. Call us at (866) 609-5033, or fill out our contact form for a free estimate. We serve clients in San Francisco and nearby areas.