7 min read • Updated May 2026 • By the CliQ Team — hardware veterans from Blink Security Cameras
What uses the most electricity in a home? Heating and cooling — your HVAC system — is the single biggest draw, accounting for about 31% of the average home's electricity use. Add water heating (12%) and you're already at nearly half your bill before you've turned on a single light.
The rest of this article ranks every major electricity user, with the actual numbers from EIA data — so you know exactly where to focus if you want to cut your bill.
The Full Ranked List: Home Electricity Use by Category
These figures come from the EIA's Residential Energy Consumption Survey (RECS), the most comprehensive government survey of how US households actually use energy. The average US home consumes about 10,500 kWh of electricity per year — here's where it goes.
| Rank | End Use | Share of Home Electricity | Avg. kWh/Year* |
|---|---|---|---|
| 1 | Air Conditioning Biggest | 19% | ~2,000 |
| 2 | Space Heating | 12% | ~1,260 |
| 3 | Water Heating | 12% | ~1,260 |
| 4 | Lighting | ~9% | ~945 |
| 5 | Refrigerator(s) | 7% | ~735 |
| 6 | Clothes Dryer | 5% | ~525 |
| 7 | Electronics & TVs | ~4% | ~420 |
| 8 | Clothes Washer | ~2% | ~210 |
| 9 | Dishwasher | ~1% | ~105 |
| 10 | Cooking (stove/oven) | ~1% | ~105 |
| — | Other (pumps, pool, misc.) | ~28% | ~2,940 |
*Based on ~10,500 kWh average annual household consumption. Source: EIA Residential Energy Consumption Survey 2020.
The headline: heating, cooling, and water heating alone account for nearly half of home electricity use. Everything else — fridge, lights, dryer, TV — competes for the other half. If your bill is high, that's where the investigation starts.
One number to remember: Air conditioning + space heating = about 31% of a typical home's electricity bill. That's before water heating, lighting, or anything else. It's also the category you have the most control over — without replacing a single appliance.
Heating & Cooling: The Biggest Line Item on Your Bill
Air conditioning is the #1 electricity end use in the average US home at 19% of annual consumption. Space heating — for homes with electric furnaces or heat pumps — adds another 12%. Together, HVAC accounts for nearly a third of your electricity use.
Why so dominant? Two reasons: wattage and runtime. A central air conditioning system typically draws 3,000–5,000 watts. Run it for a few hours a day from May through September and the kWh pile up fast. An electric furnace or heat pump does the same thing in reverse all winter.
What about gas heat?
If you heat with natural gas — as most US homes do — your furnace doesn't show up on your electricity bill. But your air conditioning still does, and so does the blower fan that runs regardless of fuel type. This is why the 19% AC figure applies broadly, while the 12% space heating figure applies mainly to all-electric homes. On an all-energy basis (including gas), heating and cooling together account for about 52% of total home energy use, according to EIA.
What you can actually do about it
The thermostat is the dial that controls all of it. The US Department of Energy says homeowners can save up to 10% per year on heating and cooling just by adjusting their thermostat 7–10°F for 8 hours per day — while they're at work or asleep. That's not a new appliance. That's a setting change.
At current energy costs, that translates to up to $150–180 per year in savings. A smart thermostat handles those setbacks automatically, every day, without you thinking about it.
For more on why bills keep climbing, see: Why Is My Electric Bill So High? 13 Reasons and What to Do.
Water Heating, Lighting & Refrigerator
Water heating (12%)
Electric water heaters tie with space heating at 12% of home electricity. They run quietly in the background — heating water you use for showers, dishes, and laundry — but they're on for hours every day. Homes with gas water heaters don't see this on their electricity bill, but for the roughly 40% of US homes with electric water heaters, it's a significant line item.
The main lever here is a heat pump water heater (if you're replacing yours) or a timer that prevents the tank from heating during peak-rate hours. Unlike your HVAC, you can't set-and-forget your way to big savings with a standard electric water heater — but you can avoid making it worse by running your dishwasher on hot cycles unnecessarily.
Lighting (~9%)
Lighting used to be one of the biggest home electricity costs. LED bulbs have largely solved that. If your home is still running incandescent or CFL bulbs, switching to LEDs is the single easiest efficiency upgrade — bulbs use 75% less energy and last 25x longer than incandescents. The payback period is usually under a year.
That said, at ~9% of electricity use, lighting is no longer where most bill problems originate. It's worth fixing, but it won't move the needle the way HVAC does.
Refrigerator (7%)
Your refrigerator runs 24/7, which is why it accounts for 7% of electricity despite drawing relatively modest wattage (typically 100–400 watts). The EIA estimates the average most-used refrigerator costs about $87/year to operate. A second refrigerator in the garage adds another ~$66/year.
If your refrigerator is more than 15–20 years old, replacing it with an ENERGY STAR model can cut its electricity use by 20% or more. But that's a capital investment — don't replace a working fridge just for the savings.
Everything Else: Dryer, TV, Dishwasher
Clothes dryer (5%)
Electric dryers are energy-intensive (typically 4,000–6,000 watts) but run for short periods. At 5% of home electricity, they're meaningful — especially for families doing multiple loads per week. The biggest win here is drying full loads rather than partial ones, and cleaning the lint trap regularly to maintain efficiency. Heat pump dryers use roughly half the energy of conventional electric dryers, though they're more expensive upfront.
Electronics & TVs (~4%)
Modern TVs and devices are far more efficient than they were 10 years ago. Standby power (the energy devices draw when "off") can add up across a home full of electronics, but it's rarely more than 5–10% of the electronics category. The bigger culprits are gaming consoles, older desktop computers, and large-screen TVs left on for extended periods. Smart power strips can cut standby draw from clusters of devices.
Dishwasher (~1%), clothes washer (~2%), cooking (~1%)
These appliances matter less than people expect. Dishwashers and washing machines use modest electricity for their motors — the bigger energy cost in a dishwasher is the hot water it uses. Running full loads and using cold-water wash cycles on your washing machine are the main efficiency levers. Cooking adds up only if you're using electric resistance coil burners or a large oven frequently; induction ranges are significantly more efficient.
Where to focus: If you want to cut your electricity bill, HVAC is where the money is. Everything below line 3 on that table combined is still smaller than what you spend on heating and cooling. Optimize that one category and you've addressed the majority of what you can realistically control.
HVAC is your biggest electricity cost. A smart thermostat handles the setbacks automatically — no rewiring, no C-wire required.
See the CliQ Smart Thermostat →Frequently Asked Questions
What uses the most electricity in a house?
Air conditioning is the single largest electricity end use in the average US home, accounting for about 19% of annual electricity consumption. Heating and cooling combined — including electric space heating — represent roughly 31%. Water heating (12%) is the next largest single category, followed by lighting (~9%) and refrigerators (7%). Source: EIA Residential Energy Consumption Survey 2020.
Does heating or cooling use more electricity?
In most US homes, air conditioning uses more electricity than electric heating — 19% vs. 12% of annual home electricity, per EIA. However, this varies significantly by climate and home type. All-electric homes in cold northern climates often see heating dominate in winter months. Homes that heat with natural gas don't see heating costs on their electricity bill at all.
What appliance uses the most electricity per hour?
Central air conditioners and electric furnaces draw the most power per hour — typically 3,000–5,000 watts for central AC and up to 15,000–20,000 watts for an electric furnace. Electric dryers and water heaters also draw high wattage (4,000–6,000W) but run in shorter bursts. High wattage + long runtime = most electricity consumed.
What is the biggest waste of electricity in a home?
Running your HVAC system at the same temperature around the clock — including while you're at work or asleep — is the most common source of wasted electricity. The DOE says adjusting your thermostat just 7–10°F for 8 hours a day can cut heating and cooling costs by up to 10%. Older refrigerators, incandescent bulbs, and electronics left in standby are also common culprits, but smaller in scale.
How much does it cost to run air conditioning per month?
At the national average of 17.3¢/kWh (EIA, 2025), a 3,500-watt central AC unit running 8 hours/day costs roughly $120–140/month. In high-rate states like Connecticut or California, that figure can be significantly higher. Using a programmable or smart thermostat to raise the temperature by 7–8°F while you're away is the most effective way to reduce this cost without sacrificing comfort.
Does a smart thermostat actually reduce electricity usage?
Yes. ENERGY STAR-certified smart thermostats save an average of 8% on heating and cooling bills, per EPA data. The DOE's independently verified savings rate from thermostat setbacks is up to 10%. At current energy prices, that translates to roughly $150–180/year for the average household — enough to pay for a new thermostat in less than six months.
Prices verified as of May 2026. Check retailer links for current pricing.
Sources
EIA, Electricity Use in Homes — https://www.eia.gov/energyexplained/use-of-energy/electricity-use-in-homes.php
EIA, Residential Energy Consumption Survey (RECS) 2020 — https://www.eia.gov/consumption/residential/data/2020/
EIA, Use of Energy in Homes (HVAC share of total energy) — https://www.eia.gov/energyexplained/use-of-energy/homes.php
EIA, Electric Power Monthly, Table 5.3 (2025 residential rate: 17.3¢/kWh) — https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=table_5_03
US DOE, Energy Saver — Programmable Thermostats — https://www.energy.gov/energysaver/programmable-thermostats
US EPA, ENERGY STAR Smart Thermostat Savings — https://www.energystar.gov/products/heating_cooling/smart_thermostats/smart_thermostat_faq
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