5 Thermostat Rules That Cut Your Heating Bill

Your heating bill is about to jump, and the cheapest fix in your house is sitting on the wall right now. The National Energy Assistance Directors Association projects the average household will spend $1,030 heating this winter — $82 more than last winter. You can't control fuel prices. You can control your thermostat.

The Department of Energy's own research says turning your thermostat back 7 to 10 degrees for 8 hours a day can save as much as 10% a year on heating and cooling. On a $1,030 average bill, that's up to $103 back in your pocket — more than covering this year's price hike. No new furnace, no contractor, no remodel. Just rules.

Here are the five rules that actually move the number.

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Rule 1: Set the 68/60/68 schedule

The DOE recommends 68°F while you're home and awake, and 60°F (or lower) while you're asleep or out. That 7–10 degree setback for 8 hours a day is where the famous 10% savings come from — and it's the single highest-impact free change you can make.

The physics work in your favor: the cooler your house gets, the more slowly it loses heat to the outdoors, so the furnace runs less to maintain the lower temperature. A common worry is that the furnace "works extra hard" to warm back up and erases the savings. The DOE addresses this directly: the savings are real, because heat loss slows as the temperature drops.

The one exception: if you heat with a heat pump, big setbacks can backfire. Heat pumps recover from deep setbacks inefficiently, often kicking on expensive backup electric resistance heat. If that's you, keep setbacks small (2–3 degrees) or use a thermostat with adaptive recovery.

Bottom line: program the drop to start at bedtime and the warm-up to finish just before you wake up. You save on every single night the setback happens — and you skip none of them, because the schedule does it for you.

Rule 2: Heat the room, not the house

Your central furnace heats the whole house to 68°F. But you're sitting in one room. Heating 2,000 square feet when you occupy 200 is the most expensive habit in the rulebook.

This is where a space heater pays for itself. Drop the whole-house thermostat a few extra degrees and warm only the room you're actually in — a home office, a bedroom, a living room. A DREO Portable Electric Space Heater runs on 1500 watts, and at typical electricity rates, running it 4 hours a day in your office while the main thermostat sits at 62°F beats running the furnace to keep the entire house at 68°F. Check current price and do the math against your own rate — for most people in small-to-midsize homes, the crossover happens fast.

This rule has a multiplier effect: every degree you lower the main thermostat saves roughly 3% on fuel consumption. Drop it from 68°F to 63°F while the space heater covers your office, and that's roughly 15% less fuel for the furnace — stacked on top of the setback savings.

Rule 3: Schedule the setback — don't trust your memory

Rule 1 only works if the setback happens every night. Doing it by hand every night is how people save $103 in theory and $12 in practice.

If you have a programmable or smart thermostat, set the schedule once before the first cold week: drop 7–10 degrees at bedtime, warm up 30 minutes before your alarm. If you don't have one, a space heater with a built-in timer covers part of the gap — the Amazon Basics Ceramic Space Heater has a 24-hour timer and an adjustable thermostat, so your office warms itself up before you arrive and shuts itself down after. Check current price — it's the budget pick for a reason.

The principle is the same as automating your savings: willpower is a terrible thermostat. Systems beat intentions.

Rule 4: Seal the leaks before you blame the furnace

Leaky windows account for 25–30% of a heating bill, according to extension specialists at Michigan State University. You can have the most disciplined thermostat schedule in the neighborhood and still be heating the driveway.

The free version: walk the house on a windy day and feel for drafts around windows, doors, and electrical outlets on exterior walls. The cheap version: weather-sealing tape or caulk for the worst offenders, a door sweep for the front door. The habits that cost nothing: open south-facing blinds on sunny days to grab free solar heat, then close all curtains at dusk to trap it. Run ceiling fans clockwise on low to push warm air back down instead of letting it pool at the ceiling.

The EPA estimates that air sealing combined with attic and crawl-space insulation saves an average of 15% on heating and cooling. That's the biggest number on this list — but most of it comes from sealing you can do yourself this weekend.

Rule 5: Maintenance is a bill cut, not a chore

A dirty furnace filter makes your system work harder to push the same warm air. The DOE's recommendation: clean or replace the filter as directed, monthly during heavy-use months. Filter neglect alone can shave up to 15% off your efficiency.

Two more five-minute checks before winter bites:

• Keep vents uncovered. Furniture, rugs, and curtains over vents choke airflow and make the furnace run longer. Move them.
• Test before it's cold. Turn the furnace on for a few hours in October. A burning-dust smell for 30 minutes is normal; if it lingers, that's a service call you want to make now — not in January, when technicians are booked solid.

The math on all five rules together

Here's what the numbers look like for the average household projected to spend $1,030 this winter:

You won't stack all of these to 40% — they overlap, and your house is its own case. But the $82 increase NEADA projects? Rules 1 and 2 alone cover it with room to spare. Rules 3–5 are what keep it covered every winter after.

Our Top Picks

• DREO Portable Electric Space Heater — Best overall. The #1 best seller in indoor electric space heaters with 21K+ ratings. Ideal for Rule 2: heat your office or bedroom while the main thermostat stays low. Check current price.
• Amazon Basics Ceramic Space Heater — Budget pick. 46K+ reviews, adjustable thermostat, tip-over and overheat protection. Same Rule-2 strategy, lower upfront cost. Check current price.

The Bottom Line

The $82 winter increase isn't optional. How you respond to it is. Set the 68/60/68 schedule tonight, heat the room you're in instead of the whole house, and seal what you can this weekend. That's three rules, one evening, and a bill that stops climbing.

Save this one for later — you'll want the table again when the first bill lands.