Winter Is Coming: Understanding Where Our Home Energy Goes

Before we invest in more energy, perhaps we should understand how we’re using what we already have.

Winter is approaching southern Alberta. The days are getting shorter, temperatures are dropping, and our homes are beginning to demand more energy.

Furnaces are running more frequently, lights are on longer, and the cost of keeping our homes comfortable is once again becoming part of the household budget.

But how much do we really understand about the energy we use?

We often talk about the price of natural gas, electricity rates, solar panels, and heating systems. Yet one of the most important questions receives surprisingly little attention:

Where does all that energy actually go?

Understanding the answer is an important first step toward reducing costs, improving comfort, and making our homes more sustainable.

1. Heating: Our Biggest Winter Energy Demand

In many Alberta homes, space heating represents the largest portion of annual household energy consumption.

That shouldn’t surprise us. Our climate requires heating for much of the year, and during particularly cold periods, maintaining a comfortable indoor temperature takes considerable energy.

But there’s an important distinction between producing heat and keeping it.

A furnace might operate efficiently, but if that heat escapes through poorly insulated walls, attic spaces, windows, or air leaks, the heating system must continually replace it.

Think of a home as a container for energy.

The better that container retains heat, the less energy we need to put into it.

This is why insulation, air sealing, and properly maintained windows can be so valuable. They don’t produce energy. They reduce the amount we need.

Before purchasing a larger heating system or installing additional renewable energy equipment, it makes sense to investigate where the existing energy is being lost.

2. Energy Efficiency and Conservation Are Not the Same Thing

These two terms are frequently used interchangeably, but they describe different approaches.

Energy conservation means reducing the amount of energy we use, often through changes in behaviour.

Turning off unnecessary lights, lowering the thermostat when appropriate, and reducing hot water consumption are examples.

Energy efficiency means accomplishing the same task using less energy.

A high-efficiency furnace, LED lighting, improved insulation, or a well-designed heat pump can provide the same service with reduced energy consumption.

Both approaches are important.

However, efficiency improvements can provide benefits year after year without requiring us to continually change our habits.

A well-insulated home doesn’t require its occupants to remember to conserve heat. The building itself does much of the work.

That is one reason I place so much emphasis on life-cycle costs rather than simply the initial purchase price.

3. The Energy We Don’t Notice

Heating receives most of our attention during winter, but other energy demands continue throughout the house.

Water heaters maintain stored water at the desired temperature. Refrigerators and freezers cycle throughout the day. Ventilation fans, electronics, computers, and appliances all contribute to household consumption.

Even equipment that appears to be switched off may continue drawing small amounts of electricity.

Individually, these demands may seem insignificant. Collectively, they contribute to our monthly utility bills.

A useful exercise is to examine several months of electricity and natural gas bills.

Rather than looking only at the dollar amount, examine the actual energy consumed.

Electricity is generally measured in kilowatt-hours (kWh), while natural gas bills in Alberta commonly report consumption in gigajoules (GJ).

One gigajoule contains approximately 278 kWh of energy.

These measurements help us understand the quantity of energy entering our homes, although the efficiency of the equipment determines how much useful heating or other service we receive.

It’s also important to separate energy charges from delivery costs, administration charges, and other fees. Reducing consumption may lower the energy portion of a bill without eliminating fixed charges.

4. Where Renewable Energy Fits

Renewable energy becomes particularly interesting once we understand our household demand.

Solar photovoltaic panels generate electricity. Solar thermal systems collect heat. Heat pumps move heat from one location to another, using electricity to operate.

Each technology serves a different purpose.

Here in Alberta, solar electricity can make a meaningful contribution to annual household energy needs. However, shorter winter days, lower sun angles, snow coverage, and seasonal weather patterns mean production varies considerably throughout the year.

That makes system design important.

A solar installation should be evaluated against actual household consumption, seasonal production, electricity rates, and the intended use of the energy.

And we shouldn’t overlook a simpler opportunity: using the sun’s heat directly.

A south-facing window can contribute passive solar heating when properly designed. A solar air heater can collect warmth during sunny periods. Thermal mass can absorb some of that energy and release it later.

These approaches remind us that renewable energy isn’t limited to generating electricity.

Sometimes the most useful energy is heat.

5. Thermal Storage: Saving Heat for Later

One of the challenges with renewable energy is timing.

The sun may provide energy when we don’t need it, while our greatest heating demand may occur after sunset.

Thermal energy storage offers one way to address that mismatch.

Water, stone, sand, and other materials can absorb heat and release it over time. The amount of useful energy depends on the material, its temperature change, the storage design, and the rate at which heat is lost.

Hot water tanks are already a familiar example of thermal storage.

Larger or more specialized systems may provide opportunities to collect heat during favourable conditions and use it later.

I’ve been exploring some of these ideas through practical maker projects, including solar air heating and experimental thermal storage.

There is considerable potential for learning here, particularly when we begin connecting renewable energy production, storage, and household heating requirements.

But proper insulation, temperature controls, electrical protection, and fire safety must be part of any storage design.

The objective isn’t simply to store energy. It’s to store it safely and recover enough useful energy to justify the investment.

6. Thinking Beyond This Winter

A heating system, insulation upgrade, or renewable energy installation should not be evaluated solely on what it costs today.

We need to consider how it will perform over its useful life.

That includes installation, maintenance, repairs, energy consumption, replacement costs, and eventual disposal or recycling.

For example, an insulation improvement may continue reducing heating demand for decades.

A new heating system may offer lower operating costs but require a larger initial investment.

A solar installation may provide energy over many years, but its economic performance depends on production, equipment costs, maintenance, and changing electricity prices.

The best investment is not necessarily the most expensive technology or the one offering the greatest advertised savings.

It is the one that delivers lasting value for the particular household.

This is the principle behind life-cycle thinking.

And it is equally relevant to our homes, municipal buildings, water infrastructure, and community facilities.

7. Start With Understanding

Before making major investments this winter, consider a few straightforward questions.

• How much electricity and natural gas does my household actually consume?
• Where might heat be escaping?
• Are my heating and ventilation systems operating properly?
• Which improvements would reduce energy demand without compromising indoor air quality or comfort?
• Could renewable energy or thermal storage provide practical benefits?
• What will these choices cost over the next 20 or 30 years?

We don’t need to answer every question immediately.

But each answer helps us make a better decision.

A sustainable home isn’t necessarily one filled with the latest technology. It’s one that uses resources wisely, maintains a healthy indoor environment, and continues performing efficiently over time.

As another Alberta winter approaches, perhaps the most useful place to begin isn’t with the energy we need to purchase.

It’s with the energy we can avoid wasting.

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Bringing It Home

At Sustainable Life, I’ve spent years exploring practical approaches to energy efficiency, renewable energy, rainwater harvesting, and resource conservation.

These systems have reinforced an important lesson: everything is connected.

If you’re interested in better understanding your home’s energy use, the Sustainable Home Review service offers a practical starting point for discussing household energy consumption, potential improvements, and longer-term sustainability opportunities.

Explore the Sustainable Home Review

Sustainability grows when we share it.

Sustainable Life | Diamond Valley, Alberta