September 12, 2026 · 5 min read
Your thermostat is the single biggest lever you have over your energy bill. The problem? Most people either set it and forget it at a comfortable-but-expensive temperature, or they play thermostat wars with their family. Here's what actually works in Ohio's climate.
The DOE-Recommended Settings
The U.S. Department of Energy recommends these settings for the best balance of comfort and savings:
| Season | When Home | When Away/Sleeping |
|---|---|---|
| Winter | 68°F | 60–62°F |
| Summer | 78°F | 85°F |
Every degree you lower your thermostat in winter saves roughly 1–3% on your heating bill. That adds up fast over an Ohio winter that runs November through March.
The Ohio Reality Check
78°F in summer sounds high, but Marion rarely gets brutal heat for extended periods. On 90°F+ days, 78 feels comfortable when the humidity is controlled. The key is humidity management — a properly sized AC system removes moisture, and at low humidity, 78°F feels like 74°F at high humidity.
In winter, 68°F is genuinely comfortable if your system distributes air evenly. If you're bumping it to 72°F because certain rooms are cold, the problem isn't the setting — it's air distribution (ductwork, insulation, or a system that's undersized).
Programmable vs. Smart Thermostats
Programmable thermostats ($30–$80) let you set schedules: lower heat at night and when you're at work, bring it up before you get home. This alone saves most families $100–$200/year.
Smart thermostats ($100–$250, like Nest or Ecobee) go further: they learn your habits, adjust based on occupancy sensors, and optimize for your utility's rate schedule. Some utilities offer rebates that bring the cost down significantly.
Common Mistakes That Cost Money
- Cranking the thermostat up high to heat faster: Setting it to 85°F doesn't heat your house faster — it just makes the furnace run longer past your target temperature.
- Turning heat off completely when away: In Ohio winters, this risks frozen pipes. Never go below 55°F, even in a vacant home.
- Blocking vents to "save energy": Closing vents increases duct pressure and makes your system work harder, not less.
- Running the fan on "ON" instead of "AUTO": Continuous fan use adds $20–$40/month in electricity with minimal comfort benefit.
Need Help Optimizing?
If your system can't maintain comfortable temperatures at efficient settings, there may be an underlying issue — poor insulation, leaky ductwork, or an aging system. Call PJ's at (740) 382-6141 for a comfort assessment. We'll find where the waste is and fix it.