Yes, a heater in a washing machine is essential for effectively removing tough stains and ensuring optimal cleaning by allowing water to reach higher temperatures, which enhances detergent performance and sanitizes fabrics.
Most washing machines do not require a built-in heater. Standard models connect to your home’s hot water supply, eliminating the need for an internal heating element. However, some high-efficiency washers include heaters for specialized cleaning functions.
How Washing Machines Heat Water
Traditional top-loading washers rely entirely on your home’s water heater. They mix hot and cold water from your plumbing system to achieve the desired wash temperature. This design keeps the appliance simpler and more affordable.
Many modern front-loading washers contain small heaters for specific purposes:
- Boosting water temperature for sanitization cycles
- Maintaining consistent temperatures during long wash cycles
- Heating water when connected to cold-only supply lines
When a Built-in Heater Makes Sense
Consider a washer with internal heating if you:
- Have an undersized home water heater
- Frequently use sanitize or steam cycles
- Live in a cold climate where water loses heat in pipes
- Want to wash in very hot water (over 140°F)
Energy Efficiency Considerations
Washers with internal heaters consume more electricity but can save energy overall by:
| Feature | Energy Impact |
|---|---|
| Smaller water volume | Heats less water than whole-home system |
| Precise temperature control | No wasted hot water in pipes |
| Cold water washing option | Eliminates heating when not needed |
Alternative Solutions
Instead of a washer with built-in heating, you could:
- Install a tankless water heater near your laundry
- Add a small point-of-use water heater
- Upgrade your main water heater capacity
Specialized Washing Needs
Certain situations demand heated wash water:
Medical Requirements
Households with allergy sufferers or immunocompromised members may need frequent high-temperature washing to kill dust mites and bacteria.
Commercial Laundry
Businesses often use washers with powerful heaters to handle heavy soil removal and meet health code requirements.
Maintenance Factors
Washers with heaters require:
- More frequent descaling in hard water areas
- Higher electrical capacity (often 240V circuits)
- Periodic element inspections
According to U.S. Department of Energy, matching your water heating system to all household needs provides the best efficiency.
Making the Right Choice
For most homes, a standard washer without a heater works fine when paired with a properly sized water heater. The added cost and complexity of heated washers only benefit specific use cases.
Front-loading models with supplemental heating elements offer flexibility but come with higher purchase prices and operating costs. Evaluate your laundry habits and existing water heating system before deciding.
