The weather in Los Angeles California is typically sunny and comfortable, but as the weather transitions into fall the early mornings and late evenings can become quite chilly. We have gathered some tips to help keep your home warmer, by making your windows more energy efficient.
According to energy.gov, you can add storm windows, caulking, or weatherstripping to reduce air leaks which will help keep warm air in during the colder season.
Some additional tips provided include:
Reduce drafts with heavy-duty clear plastic sheets either tapped to the inside of the window, or attached to a frame placed in the window.
If your windows feel drafty it is recommended you install a tight-fitting window shade.
Keeping your curtains closed at night keeps warm air in, and opening them during the day warms the room with sunlight.
Interior or exterior storm windows can reduce heat loss by 10-20%.
Installing interior or exterior storm windows can reduce heat loss by 10-20%.
Replace your windows:
Another option you have if going the DIY route with your existing windows is too difficult or expensive, you could just replace your windows.
When selecting windows there are a lot of important factors to consider in a warmer climate:
Maximize heat retention in the winter by having more windows facing south:
This collects heat in the winter when the sun is lower in the sky
Also this reduces heat in the summer sine the sun is higher in the sky
It is best to reduce the number of windows on the east, west and north walls:
It is difficult to mange the heat from east or west facing windows
North facing windows typically do not collect solar heat, but are good for natural lighting
The National Fenestration Rating Council (NFRC) created the process to test and certify windows. Here are the things that they measure and what they mean:
U-factor: The rate of non-solar heat flow, usually expressed like this (Btu/hr-ft²-°F). A U-factor can refer to the glass or glazing ability to conduct non-solar heat flow, but NFRC U-factor ratings consider the entire window performance. In order to compare scores between windows, the lower the rating the more efficient the window is.
Solar heat gain coefficient (SHGC) : The measure of solar radiation that is absorbed and released into the home as heat. A high SHGC rating is going to be able to retain more heat in the winter, whereas a lower SHGC rating is better at blocking heat during summer.
Air leakage: This rating measures the air movement under specific pressure differences across it. The unit is expressed in cubic feet per minute per square foot of frame area (cfm/ft2). A lower rating means it is a tighter window fit, and thus creates less air leakage.