energy-efficient glazing, what does it all mean?
All properties lose heat through their windows. But energy-efficient glazing keeps your home warmer and quieter as well as reducing your energy bills.
energy-efficient glazing, what does it all mean? Watch the video to find out more.
Energy-efficient windows can help reduce your utility bills and make your home more comfortable. Not to mention the peace of mind that comes with knowing you’re helping the planet by minimizing environmental impact. Marvin offers a variety of window and door options that help you achieve long-term performance and energy cost savings, in any climate.
Q I need new windows. What’s the first thing I need to know when it comes to windows and energy efficiency?
A Replacing windows with energy-efficient ones can help reduce your utility bills, but the benefits go much further. Choosing energy-efficient windows makes your home more comfortable, as their performance determines how much heat comes in and escapes out through the windows. Here are a few principles that are fundamental when choosing windows that not only look after your heating costs, but looks after the environment today, tomorrow & into the future.
Q How do I know if a window or a door is energy efficient?
A Certification programs such as those administered by the National Fenestration Rating Council (NFRC) and ENERGY STAR provide ratings designed to indicate a window or door’s efficiency. Various performance ratings — like U-factor and Solar Heat Gain Coefficient — measure a product’s effectiveness in insulating and blocking heat from the sun, among other things. See the Glossary of Terms.
U-FACTOR: Simply put, U-factor measures how well a window keeps heat inside your home. It’s a measure of total heat flow through a window or door from room air to outside air. Lower numbers indicate greater insulating capabilities. It’s a particularly important measure for climates with colder winters.
SOLAR HEAT GAIN: If U-factor denotes how much heat leaves your home, the Solar Heat Gain Coefficient (SHGC) measures how much radiant heat enters your home. All you really need to remember is: The lower the number, the less heat a window lets in.
VISIBLE TRANSMITTANCE (VT): The amount of visible light transferred through a window. Low E coatings can reject solar heat gain without reducing visible light to pass through the glass. A high VT is desirable to maximize daylight.
AIR LEAKAGE: Air leakage, or air infiltration, is the amount of air that passes between the indoors and outdoors through cracks in a window assembly.