# How your home loses heat through windows

Published: Feb 06 2013 11:39:33 AM EST   Updated On: Feb 20 2013 04:37:15 PM EST

By Sirena Rubinoff, Networx

But before you turn the thermostat up to accommodate the colder weather outside, you might want to learn a little bit about how the heating in your house actually works. Sometimes turning up the heat dial will only turn up your bill if your home is experiencing extreme heat loss. So, read on to find out how heat travels through your home and what you can do to keep it where you want it.

#### Conduction

One of the laws of physics is that energy always flows from warmer to colder areas. This is called conduction: Heat is conducted away from hot objects and towards cold objects. For example, when you sit down on a chair, heat flows from your body into the chair. Then if you stand up and touch the chair cushion a few minutes later, it will feel warm. This happens because of molecular movement. When you sit down on the chair, your body heat causes the molecules in the chair to start moving faster. Once they start moving, they hit other molecules nearby until all of the molecules near the top of the seat are moving and transferring heat throughout the entire object. Heat conduction only works through direct contact of solid objects. An example of this in your home would be in your flooring. If your floors are warm or heated, they will help warm up any furniture, carpets, or other objects touching the floors, which will in turn stabilize the heated temperature you've set for your rooms.

#### Convection

When we conduct heat to air or water, it is called convection. This is how we heat our homes. Our heat sources (boiler, furnace, etc.) conduct heat into the air, which then moves away from the heat source towards cooler areas in the room. This phenomenon is called a convection current. If your room is sealed properly, the convection current will work in your favor to heat up your room quickly and cozily. If you have air leakage to the outside, convective heat loss will occur as your warm air seeks to flow out towards the cold air. This may occur through air leaks around windows, doors, floors, ceilings, and walls.