What Are the Features of Energy-Efficient Patio Doors?

Energy-efficient doors can significantly increase your home’s comfort as well as reduce your heating and cooling costs. These doors are also great for the environment since they help lower your household’s carbon footprint and greenhouse gas emissions.

Find out what makes a patio door energy-efficient from a trusted residential window contractor.


Doors must meet various requirements to become ENERGY STAR certified. They should be manufactured by an official ENERGY STAR doors partner, tested and certified by the National Fenestration Rating Council (NFRC), and adhere to the U.S. Department of Energy’s ENERGY STAR doors guidelines.

ENERGY STAR patio doors windows usually have gas fills in between glass panes. These gases can increase the glass and the door’s insulation. The material of your door can also affect its energy efficiency. At Renewal by Andersen®, our ENERGY STAR®-certified doors and specialty windows are 70 percent more efficient in summer. They also block 95 percent of harmful ultraviolet rays, protecting your furnishings and flooring from fade and fabric deterioration.

NFRC Ratings

U-factor – It measures the rate of heat transfer through your doors. The lower the U-factor of a door, the more it can resist heat flow and the better its insulating capabilities.

Solar Heat Gain Coefficient (SHGC) – SHGC measures how well a unit can prevent solar heat gain. Doors with lower SHGC blocks more solar heat.

Glazing Level – This refers to the amount of glass your patio door has. An opaque door contains no glass while a unit greater than or equal to half-lite has half glass or less. When a door is greater than half-lite, it means it’s mostly glass, like sliding or French doors.

Turn to Renewal by Andersen of Sacramento for your ENERGY STAR patio doors and casement windows. Call us at (916) 779-5800 or fill out our contact form to schedule a free consultation. We serve homeowners in Davis, CA.