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Energy Efficiency

Window World Windows are designed for superior thermal performance. Window World offers many ENERGY STAR®-qualified glass packages that help significantly reduce your energy use while helping cut consumption of the fossil fuels that pollute our environment.

Never Sacrifice Your Comfort
Boost Your Home's Energy Efficiency Today!

Table of Contents

Understanding Energy Efficiency

The Technology

Science Behind The Savings


Low-E Glass

Low-E glass is brilliantly engineered to block most UV rays out so your home stays at a comfortable temperature each season.

Warm-Edge Spacer

Intercept™ warm-edge spacer insulates the exterior edges of a sealed unit and can tack on 5% savings on monthly energy costs.

Vinyl Framing

Vinyl window frames are constructed to deliver excellent thermal insulation while sealing out drafts and unwanted weather.

Innovative Weatherstripping

Airtight weatherstripping seals the sides, top and bottom frames of your door to prevent air infiltration.

Insulated Core

An insulated polyurethane core provides an additional thermal barrier for better insulation.

Sturdy Frames

Composite frames resist rotting, rusting and warping to withstand constant exposure to the elements.

Energy-Saving Door Lites

Decorative and ENERGY STAR-compliant door lites are an integral part in a door system’s seal and thermal performance.

Insulated Structure

Built with rigid foam insulation to reduce energy loss and reinforce the siding for smoothness and straight lines.

Energy-Saving Barriers

High-density insulation to minimize outdoor noise for a quieter indoor ambiance and loss of wanted heat or air.

Built to Last

Fully rolled over, double-thick nail hem anchors panels to the wall; tested to withstand harsh weather.

How It Works

SolarZone™ Insulated Glass Packages

Since 80% of a window is glass, substantial heating and cooling savings come from improved glass performance. Our SolarZone insulated glass packages can help you save on energy and cooling costs while keeping your home more comfortable.

  • Combination of UV-filtering Low-E glass, insulating argon gas and a warm-edge spacer system can cut damaging UV energy, which can lead to the fading of carpets, curtains and furniture by over 75%.
  • The center of glass U-Value of SolarZone insulating glass is 50% better than standard insulating glass.
  • In summer, up to a 58% reduction in solar heat gain helps reduce air conditioning costs.

How It Works

Warm-Edge Spacer Systems

Our window offer two high-performance warm-edge spacers to keep the glass of the window warmer so your home feels more comfortable in the cooler months.

Intercept™ Spacer System

The Intercept spacer system features a unique, one-piece metal alloy, U-channel design that creates an effective thermal barrier to help reduce conducted heat loss through the window.

Optional Foam Spacer System

The optional foam spacer system combines a structural foam spacer with a seal of hot melt butyl to create a non-conductive edge, which eliminates any metal to glass contact.

Climate Requirements

Interested in Becoming ENERGY STAR® Certified?

ENERGY STAR is a government-sanctioned symbol for energy efficiency, credibility, sustainability and cost-savings for the consumer. Explore the requirements to become ENERGY STAR-certified below and see what it looks like in your region of the country.

Your Climate

U-Factor Requirements

U-Factor measures the rate at which heat flows through an object. The lower your U-value, the less heat your windows allow through them.

  • Northern: ≤ .27
  • North-Central: ≤ .30
  • South-Central: ≤ .30
  • Southern: ≤ .40

R-Value Requirements

R-Value determines how well the insulation inside your window is performing. The higher your R-value, the better insulated your window is.

  • Northern: 13 – 21
  • North-Central: 13 – 21
  • South-Central: 13 – 21
  • Southern: 13 – 21

Why You Need A High-Performing Insulated Product

Window World of Long Island is located in ENERGY STAR’s Northern Climate category. To maintain certification here, our windows and doors must maintain a U-Value of ≤ .27 and an R-Factor from 13 to 21.

Glossary Of Terms

Energy Efficiency Terms You Need To Know

Low-E Glass

Low-E glass is a type of glass that has been treated with a microscopic, metallic coating designed to filter certain types of light into your home. The glass blocks heat gain from the sun’s reflected rays in warmer months and allows warmth from the sun’s shorter rays to flow into your home during cooler seasons.

Warm-Edge Spacer System

A warm-edge spacer is designed to block the path of escaping heat far more efficiently than traditional box-shaped spacers. The result is reduced condensation on window glass. Window World offer two options:

Intercept™ Spacer System

The Intercept spacer system is nearly 25% more effective than a traditional box-shaped spacer at the edge of the glass unit.

Optional Foam Spacer System

The optional foam spacer system is over 60% more energy-efficient than a traditional box-shaped spacer.

Argon Gas

Argon is a colorless, odorless and nonreactive insulating property with extremely high density and extremely low thermal conductivity, making it an ideal agent for year-round comfort.

Make Your Home Energy-Efficient

Going green is a smart investment into your home. The payoff is not only significant, but also tangible. You’ll reap the benefits in comfortability and cost, as energy-efficient products pay for themselves time and time again.

If you’re ready to see the difference and enjoy being comfortable in your home again, contact the professionals at Window World today. We are happy to provide you with a free in-home estimate and answer any questions you may have about energy efficiency!

Schedule Your Free In-Home Estimate Today.

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