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Thermal Energy Transfer | PBS LearningMedia

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Explore the three methods of thermal energy transfer: conduction, convection, and radiation, in this interactive from WGBH, through animations and real-life examples in Earth and space science, physical science, life science, and technology.

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What are Energy Efficient Houses | Twinkl Teaching Wiki

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What are energy efficient houses? In this Teaching Wiki, we explore what makes a house energy efficient, and suggest some ways to reduce your carbon footprint.

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How cool would it be to save money and help the planet with a few quick and easy fixes to our homes?

You and the people you live with don't need to do anything fancy or expensive. You also don't have to make drastic changes to your lifestyle. Just a few easy steps can help the Earth and your family's bank account. It's a win-win!

Did you know?

Many households have to pay for electricity on top of their mortgage or rent. The cost of electricity varies across Canada, but the average is about 14¢/kWh.

Why does the Earth need help?

What are some ways you use energy in your home? You might have a heater, an air conditioner, a refrigerator, and a stove. You probably have various other electronic gadgets. All of these things need energy to run. But where does the energy come from? It can come from renewable resources, such as hydropower. But it can also come from non-renewable resources, such as burning fossil fuels like coal. Non-renewable resources come with problems. First of all, they will eventually run out. Also, they are often a source of greenhouse gas (GHG) emissions.

What is energy efficiency?

Making our homes more energy-efficient is a great way to help reduce how much energy we use. This can also help cut down on greenhouse gas (GHG) emissions. Energy efficiency means using the least amount of energy required to do a task. In other words, it means not wasting energy.

What is heat transfer?

There's an important connection between energy efficiency and thermal energy transfer. Thermal energy transfer is also called heat transfer. Heat flows in one direction: from a warmer area to a colder one. If you're cooking and your kitchen gets too warm, you might open a door or window to "let the heat out." What you are actually doing is letting the warm air inside move towards the colder air outside.

But sometimes, heat transfer happens when you don't want it to. Have you ever felt drafts of air coming in through a window? That's an example of heat transfer, too. If your house is drafty, you might turn up the heat to warm it up. But that heat will continue to move towards the colder air outside. In other words, you'll waste that energy.

Why is insulation important

One way to make a home more energy-efficient is to it properly. Insulation can trap heat. This prevents heat from moving from a warm area to a cooler one. If a house is not properly insulated, heat can escape through the walls, roof, and other places. Remember the draft from the window? Another common place for heat loss is around windows and doors. These little gaps can be filled with various materials. This process is often called weatherstripping.

Using insulated curtains can help, too. These curtains have several layers that block light, sound, and heat transfer. In the winter, they help keep warm air in and cold air out. In the warm months they help keep cool air in and warm air out. Of course, insulated curtains work best when the windows have been properly insulated, too.

Heat can also escape from water pipes. Not only that, but if water pipes are exposed to an outside wall in cold weather, they can freeze and burst! This can cause a flood. Pipes can be insulated using insulation wraps.

How can you help make your home more energy-efficient?

Does insulation sound like a big task that professionals should deal with? Don't worry. There are easy things that you or the people in your home can do, too. For example, when it gets cold, wear warm sweaters indoors. This way, you can keep the thermostat down.

You can also turn off appliances and lights when you are not using them. Even better, unplug appliances when you're not using them. Also, swap your regular light bulbs out for energy-efficient LED bulbs.

You can also talk to the decision-makers in your home about some longer-term solutions. You can suggest they install programmable thermostats and smart power meters.

As you can guess from the name, programmable thermostats can be programmed. This way, your thermostat can automatically lower the temperature when you don't need as much heat. For example, it can lower the temperature at night and when people are out at work or school.

Smart power meters can help adjust how much power your appliances use during peak power load times. A peak power load time is when people are at home and likely to be using lots of energy. For many people, the times right before and after school or work are peak power load times. This adjustment can help reduce your home's overall energy consumption. Which means your family saves money!

The EnerGuide and ENERGY STAR®

The EnerGuide provides information about electronics, buildings, and now even cars! Reading the official EnerGuide can help people understand how they can help affect change.

The EnerGuide recommends you use ENERGY STAR®-certified appliances and electronics in your home. ENERGY STAR® certifies that a product is energy-efficient. The system is recognized all over the world. There are ENERGY STAR ®-certified LED bulbs, refrigerators, and other appliances. There are also ENERGY STAR®-certified windows and exhaust fans. ENERGY STAR ® versions of these household items can help keep your energy use down. Ultimately, they can help reduce fossil fuel consumption.

So...what makes a home energy-efficient?

Graphic - Text version

From Natural Resources Canada: A cutaway of the house showing features that makes a home energy efficient: airtight construction pointing to the outside walls; high-performing ENERGY STAR certified windows pointing to the window in the bedroom; air sealing (e.g. around windows, doors, electrical outlets, vents) pointing to the door in the living room; LED or ENERGY STAR certified lighting pointing to the light in the kitchen; ENERGY STAR certified appliances (e.g. fridge, clothes washer and dryer) pointing to the fridge in the kitchen; high-performing or ENERGY STAR equipment (e.g, furnace, AC, water heater) pointing to the furnace in the basement; and better insulation (e.g. walls, attic, basement) pointing to the cutaway of the wall in the basement.

Below are some examples of how simple changes at home can save you money.

You can cut your home's energy costs by 10% if you turn back the thermostat by 5 degrees Celsius for 8 hours of the day. For example, you can do this overnight.

You can save $35 a year (and over 5 000 litres of water!) by fixing a leaky faucet.

You can save up to $75 a year by replacing the light bulbs in the five most-used fixtures in your home with ENERGY STAR® light bulbs.

Remember, a lot of little savings can add up! Now you have the information you need to start making energy-efficient decisions. Do your bit to spark change by striking up a conversation. Let's try to save the environment - all from the comfort of our homes. Who's ready?

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How cool would it be to save money and help the planet with a few quick and easy fixes to our homes? You and the people you live with don't need to do anything fancy or expensive. You also don't have to make drastic changes to your lifestyle.