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When winter travel collides with a forecast for freezing temperatures, the one question every homeowner asks is simple: do I shut the heat off to save money or keep it running to protect my home? The choice matters. Mistakes can mean burst pipes, ruined electronics, and a big repair bill when you return. Experts recommend practical steps that balance safety and savings, and small adjustments now can prevent major headaches later.
Why turning the heat completely off is risky before a freeze
Shutting your heating system all the way down may seem like obvious savings. But homes lose heat faster than many expect. Rapid heat loss forces the system to work harder when restarted. That can spike energy use and stress equipment.
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Most importantly, cold weather puts plumbing at risk. Pipes in exterior walls, garages, basements, and unheated crawl spaces can fall below freezing. When water inside pipes freezes, it expands and often splits the pipe. The result is not only water damage, but costly emergency repairs.
Keeping a low, steady temperature helps prevent frozen pipes. It also reduces the demand surge needed to bring the house back to a comfortable level after a trip.
Thermostat settings that protect your home and save energy
There is a middle ground between full heat and total shutdown. Many HVAC pros advise lowering the thermostat, not switching it off. A modest setback saves energy while keeping critical areas warm enough.
- Around 55°F (13°C) is often recommended for typical homes. This temperature is usually enough to prevent water in interior plumbing from freezing.
- If your house has thin walls or old windows, consider setting the thermostat closer to 60°F (16°C).
- For mild climates where nights rarely fall under 40°F (4°C), a lower setting may be safe—check local forecasts and your home’s insulation first.
Smart thermostats make this easier. Use programmable schedules to lower the temperature after you leave and raise it just before you return. Remote controls let you check and tweak settings while traveling.
Concrete steps to winterize your home before leaving
Beyond thermostat adjustments, several quick tasks reduce the risk of freeze-related damage.
- Insulate exposed pipes with foam sleeves, especially in unheated areas.
- Open cabinet doors beneath sinks on exterior walls to let warm air circulate around pipes.
- Consider leaving a slow drip from faucets connected to vulnerable pipes. Moving water resists freezing.
- Close garage doors and seal gaps around windows and doors to limit cold air intrusion.
- If you’ll be away for an extended period, shut off the main water valve and drain the system to eliminate pressure from potential bursts.
Special considerations for older homes and electronics
Vintage houses and those with poor insulation need extra care. Exterior wall pipes and poorly protected crawl spaces are most at risk. In these properties, a higher baseline temperature or additional insulation may be necessary.
Cold and humidity shifts can also harm electronics and appliances. Condensation can form when a very cold house is quickly reheated. To protect sensitive equipment, maintain a steady indoor climate and avoid drastic temperature swings.
When to call a pro and other safety precautions
If you have a history of frozen pipes or a complicated HVAC system, schedule a professional inspection before travel. An HVAC technician can advise on safe setback temperatures and detect weak points in your system.
- Ask a neighbor or friend to check the house periodically if you expect extreme cold.
- Leave contact info and instructions with someone local in case a pipe bursts or the heating system fails.
- Install a smart water leak detector near vulnerable plumbing for early alerts on leaks.
