Intermatic WH40 Electric Water Heater Timer – Gray, 1-Hour On/Off, Steel Case

Overview

Meet the Intermatic WH40 Electric Water Heater Timer in a compact gray steel enclosure. This durable timer automates hot water usage with simple, reliable on/off control, helping you align energy use with your routine while fitting into tight spaces.

Designed for North American systems, the WH40 handles up to 10,000 watts, 40 amps, 250 volts at 60 Hz, and carries UL and CSA approvals. The compact steel case measures 5-1/8 in wide by 3-7/16 in deep by 7-7/8 in high, making it suitable for wall-mount or utility panel installations while staying unobtrusive.

How it works

The timer works with three tripper sets that you can position to create wake-up and evening hot water windows. With a minimum ON and OFF time of 1 hour, you can structure hot water use in blocks that fit typical daily routines. The design encourages planning hot water usage to coincide with your needs, helping to optimize overall energy use without sacrificing comfort.

Morning and evening usage are common patterns. To maximize potential savings, many users set the ON periods to start about an hour before anticipated use and let the evening window run during critical times. The trippers themselves are adjustable from 1 to 23 hours, so you can tailor the schedule as seasons and routines change. Three sets of trippers are included for flexible planning, and the timer includes an external override switch for quick manual control when you need hot water outside the programmed windows.

Key features

• Easy to use
• Convenient external override switch
• 10,000 watts, 40 amps, 250 volts, 60 Hz capacity
• Steel case for durability
• Trippers can be set in the morning and evening when you need and use hot water

Smart usage tips

• Position tripper sets to reflect your typical daily routine
• Schedule ON times to begin one hour before expected hot water use
• Keep the external override handy for unplanned needs

In short, the WH40 balances a robust electrical specification with a practical, user friendly design. The result is a timer that supports flexible scheduling, durable construction, and straightforward operation, backed by approvals that align with North American standards.