Set your thermostat to at least 55°F (13°C) to prevent freezing and protect your home’s plumbing during cold weather.
Winter brings freezing temperatures that can wreak havoc on your home’s plumbing. Setting your thermostat correctly is crucial to prevent frozen pipes that may burst and cause costly water damage. This guide provides expert recommendations and actionable tips to protect your pipes all season.
Recommended Thermostat Settings To Prevent Freezing
The ideal temperature setting depends on several factors including your climate, home insulation, and pipe locations. Here are the key guidelines:
- Minimum setting when home: 68°F (20°C)
- Minimum setting when away: 55°F (13°C)
- For extremely cold climates: No lower than 60°F (16°C)
According to the U.S. Department of Energy, these temperatures provide sufficient warmth to keep pipes in interior walls from freezing while still allowing energy savings.
Why 55°F Is The Magic Number
Fifty-five degrees Fahrenheit serves as the universal baseline because:
- It’s well above water’s freezing point (32°F)
- Provides enough ambient heat to protect pipes in interior walls
- Balances energy savings with freeze protection
Factors That Affect Freezing Risk
Pipe Location Matters
Pipes in these vulnerable locations need extra attention:
| Location | Freezing Risk | Protection Tips |
|---|---|---|
| Exterior walls | High | Add insulation or heat tape |
| Attics/Crawlspaces | Very High | Insulate and seal air leaks |
| Garages | High | Keep garage doors closed |
Regional Climate Differences
Homes in southern states may need higher thermostat settings because:
- Pipes are often located in exterior walls
- Homes have less insulation against cold
- Freezing occurs at warmer temperatures (around 20°F)
For northern homes built for winter, pipes are typically better protected in interior spaces.
Additional Freeze Protection Strategies
Pipe Insulation Is Essential
Proper insulation can lower your minimum thermostat setting by 5-10 degrees. Consider these options:
- Foam pipe sleeves (easiest DIY option)
- Fiberglass wrap for extreme cold
- Heat tape for problematic areas
Our guide to water heater thermostat controls can help optimize your entire system.
Let Faucets Drip Strategically
A slow drip (about 5 drops per minute) from faucets on exterior walls can prevent freezing by:
- Keeping water moving through pipes
- Relieving pressure that causes bursts
- Allowing warmer groundwater to enter system
Special Considerations
Vacation Homes & Extended Absences
For properties left unoccupied in winter:
- Set thermostat no lower than 55°F
- Shut off main water supply and drain pipes
- Consider a smart thermostat for remote monitoring
Rental Properties
Many landlords require tenants to maintain minimum temperatures (often 68°F) to prevent frozen pipes. Always check your lease agreement.
When Temperatures Plummet
During extreme cold snaps (below 0°F):
- Increase thermostat to 70°F day and night
- Open cabinet doors to allow heat to reach pipes
- Drip multiple faucets, especially on north-facing walls
The Home First Agency recommends these extra precautions when temperatures drop dangerously low.
Recognizing & Thawing Frozen Pipes
Warning signs include:
- Reduced or no water flow
- Frost on visible pipes
- Unusual smells from drains
If pipes freeze:
- Keep faucet open to allow thawed water to flow
- Apply heat with hair dryer or heating pad (never open flame)
- Call plumber if you can’t locate or thaw the frozen section
Proper thermostat settings combined with these preventive measures will keep your pipes flowing freely all winter long.
