When winter arrives, your water heater has to work harder to provide hot water your household. Cold days can affect water temperature, energy efficiency, recovery time, and the overall performance of your water heating system. Fortunately, whether you have a traditional tank water heater or a tankless unit, a few maintenance steps can help improve performance, reduce energy waste, and protect your system from damage during winter weather.
Cold Incoming Water Takes Longer to Heat
During the warmer months, groundwater entering your home is typically warmer. In the winter, that water can be significantly colder, especially in regions that experience freezing temperatures.
Your water works hard to raise the incoming water to the desired temperature. When the starting temperature is lower, the system needs more energy to do the job. This can lead to noticeable changes, such as:
Lower Heating Times — A traditional tank water heater may take longer to replenish its supply of hot water after heavy use.
Reduced Hot Water Avaliablity — Multiple showers, laundry loads, or dishwasher cycles may use up hot water more quickly than expected.
Increased Energy Consumption — Gas and electric water heaters may use more energy to maintain your desired hot water temperature.
If you run out of hot water faster during winter weather, colder incoming water may be part of the reason. However, a sudden or significant change in performance could indicate a maintenance issue or equipment problem.
Your Water Heater May Use More Energy
Since your water heater has to work harder to heat colder water, you may see an increase in household energy use during the winter. This is particularly noticeable in homes with high hot water demand.
Traditional tank water heaters also lose some heat through their storage tanks. If the unit sits in a cold basement, garage, or utility room, heat loss may increase, though it depends on the surrounding temperature and tank’s insulation.
While a tankless water heater doesn’t rely on a storage tank, it still has to heat incoming water. When this water is colder, the unit must deliver a greater temperature increase to produce hot water.
To help manage winter energy costs, consider insulating accessible hot water pipes where appropriate, repairing dripping hot water faucets, and scheduling routine maintenance.
Freezing Temperatures Can Damage Pipes and Water Heater Components
Freezing temperatures pose a significant risk to your water heater. Water expands as it freezes, which can lead to cracked pipes, broken fittings, and damaged water heater components.
This risk is especially prominent if your water heater is located in an unheated garage, cold basement, unventilated crawl space, or any other area exposed to cold winter air.
To protect your system during freezing winter weather:
- Insulate exposed hot and cold water pipes
- Seal drafts around plumbing penetrations and exterior walls
- Keep the area around your water heater within the recommended temperature range
- Make sure any built-in freeze protection features are working correctly
- Follow the manufacturer’s winterization instructions if you expect an extended power outage during freezing conditions
Note that built-in freeze protection doesn’t always protect all external pipes and valves. If you suspect a pipe has frozen, don’t use an open flame to thaw it. Contact a qualified plumber if you can’t safely resolve the issue.
Increased Winter Hot Water Use Can Strain Your System
Cold weather often changes household routines. You may take longer showers to warm up, need to wash additional layers of clothing, or use more hot water for cleaning. You may also host holiday visitors, which can increase demand even further.
Between these changes and colder incoming water, your water heater may have less time to recover between uses. To avoid running out of hot water, you may need to spread out high-demand activities, schedule maintenance, or install a different sized unit.
Winter Is an Important Time for Water Heater Maintenance
Routine maintenance can help your water heater handle the additional demand of winter. Before or during the winter season, consider scheduling an inspection. A professional can check the unit for leaks or corrosion, inspect connections, and identify potential performance issues. They can also complete maintenance and any necessary repairs.
Keep Your Water Heater Running Through Winter
Winter weather can affect your water heater in several ways, from longer heating times and increased energy use to reduced hot water output and the risk of frozen plumbing. Fortunately, if your hot water is struggling to meet demand, producing inconsistent temperatures, or leaking, professional service can help identify the cause and ensure you have a reliable hot water supply.
Contact Just Water Heaters today if you need an inspection, maintenance, or repair service.
