Best Timer for Hot Water Heaters to Save Energy
Installing a timer on a hot water heater can optimize energy use and ensure hot water is available when needed. This article highlights five reliable timers that work with electric water heaters, along with practical buying considerations. Each product section includes a concise overview of key features to help you compare options quickly and make an informed choice.
| Product | Brand | Key Feature | Model |
|---|---|---|---|
| Intermatic WH40 Electric Water Heater Timer | Intermatic | External override switch; 40A; 250V | WH40 |
| Smart Water Heater Timer (Alexa compatible) | Aquanta | Remote control; learns schedule; storage heater compatibility | Smart Water Heater Timer |
| BSEED Smart Water Heater Switch | BSEED | Group control; timing function; voice control | Smart Water Heater Switch |
| Intermatic WH21 Electric Water Heater Timer | Intermatic | Automatic scheduling; high-use/low-use control | WH21 |
| Intermatic EH10 Electric Water Heater Time Switch | Intermatic | 42 events per week; seven-day scheduling | EH10 |
The following sections present five recommended options, each with a brief overview, notable benefits, and product-specific details to assist in choosing the right timer for your hot water system.
Intermatic WH40 Electric Water Heater Timer
The Intermatic WH40 provides a robust, easy-to-use mechanical timer designed for electric water heaters. With a capacity of 40 amps at 250 volts and 60 Hz, it supports typical residential loads while offering a convenient external override switch for quick manual control. This timer helps optimize daily hot water usage by scheduling ON/OFF periods across the week. It suits standard installations and is a reliable, straightforward option for those preferring a hard-wired timer without smart connectivity.
Smart Water Heater Timer: Alexa Compatible
This Aquanta timer offers smart features that learn your routine to automate hot water usage. It enables remote control via a smartphone or smart device and supports most storage-style water heaters. The device is UL safety certified and is designed for quick installation without extensive plumbing work, making it accessible for many homeowners seeking automation and convenience.
BSEED Smart Water Heater Switch
The BSEED smart switch adds Wi-Fi-based timing and voice control through Amazon Alexa or Google Assistant. It supports group control so multiple switches can be managed together via the Smart Life app, enabling coordinated energy saving across devices. It is designed for standard wall boxes and offers programming, scheduling, and energy-saving benefits, making it suitable for more integrated home automation setups.
Intermatic WH21 Electric Water Heater Timer
The WH21 timer from Intermatic focuses on automatic scheduling with a single pole/single throw configuration. It helps you turn hot water on during peak usage times and off during low-use periods, balancing convenience with energy savings. It’s a versatile option compatible with many standard electric water heater setups, and it provides reliable weekly scheduling without smart home requirements.
Intermatic WH40 Mechanical Water Heater Time Switch
The Intermatic WH40 Mechanical Time Switch is a durable, straightforward option for those who prefer a traditional mechanical interface. It mirrors the capability of the WH40 but focuses on dependable mechanical timing without digital networking. This unit is well-suited to users who want a robust, simple timer that reliably manages weekly on/off schedules for electric water heaters.
WATER HTR TIMER 30W (CAI – INTERMATIC)
The CAI Intermatic timer supports seven-day scheduling with 42 ON/OFF events per week and to-the-minute programming. It emphasizes precise timekeeping and detailed control for energy management, making it a strong option for households that require fine-grained timing and reliable performance across a full week.
Intermatic EH10 Electric Water Heater Time Switch
The EH10 offers up to 42 ON/OFF events weekly with seven-day scheduling, plus to-the-minute accuracy. Its external override and LED load indicator provide clear, immediate feedback on system status. This model is designed for precise weekly programming and reliable water heating control in varied daily routines.
Buying Guide: Key Purchase Considerations
- Compatibility: Confirm voltage, amperage, and whether your water heater is storage-style or tankless, and ensure the timer supports the heater’s electrical load.
- Control Type: Decide between mechanical timers (simpler, rugged) and smart timers (remote control, scheduling, voice assistant integration).
- Scheduling Capabilities: Evaluate the number of ON/OFF events per week and whether you need minute-level precision or flexible 7-day planning.
- Connectivity and Ecosystem: If adopting smart timers, check compatibility with Alexa, Google Assistant, or other smart home systems you use.
- Installation and Wiring: Some models require minimal wiring or external overrides; others may need professional installation, especially if wiring changes are required.
- Reliability and Durability: Look for products with robust build quality and manufacturer support, especially for harder-water environments that can affect older timers.
- Energy Savings: Consider how scheduling aligns with your daily water usage to maximize hot water availability while reducing standby losses.
- Safety Features: UL safety certification and clear load indicators help prevent mis-wiring and ensure safe operation.