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Intermatic EH40 240-Volt Electronic Water Heater Timer

| 8 answered questions

List Price: $83.68
Price: $60.20 & FREE Shipping. Details
You Save: $23.48 (28%)
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  • Switch DPST, 240-Volt AC, 7200-Watt
  • These time switches provide automatic control for electric water heaters
  • They provide to-the-minute accuracy in programming and time keeping
  • The time switches can be set to operate for up to 6 ON/OFF operations daily for a maximum of 42 ON/OFF operations weekly
  • provide a convenient external override switch and LED load indicator for ease in scheduling hot water as required for extra hot water demands
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9 new from $60.20 1 used from $79.99

Frequently Bought Together

Intermatic EH40 240-Volt Electronic Water Heater Timer + P3 International P4400 Kill A Watt Electricity Usage Monitor
Price for both: $80.08

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Product Information

Technical Details
Part Number EH40
Item Weight2.4 pounds
Product Dimensions8.1 x 5.3 x 3.3 inches
Item model numberEH40
Item Package Quantity1
Warranty Description1 Year, replace unit, no labor
  
Additional Information
ASINB000NCYPOM
Best Sellers Rank #6,578 in Home Improvement (See top 100)
Shipping Weight2.4 pounds (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableNovember 9, 2004
  
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Product Description

From the Manufacturer

These time switches provide automatic control for electric water heaters. They provide to-the-minute accuracy in programming and time keeping. The time switches can be programmed for repeat daily scheduling, 5-day working week scheduling, weekend scheduling or any individual day scheduling. Timers can be scheduled for operation during the lowest time-of-day rates or to switch off the electric heater during period of utilities peak power usage. The time switches can be set to operate for up to 6 ON/OFF operations daily for a maximum of 42 ON/OFF operations weekly. Both models provide a convenient external override switch and LED load indicator for ease in scheduling hot water as required for extra hot water demands. The timers include a "AA" alkaline battery carryover which protects both time keeping and program information for a minimum of 3 years.

Product Description

  • Brand: Intermatic
  • -
  • Part No.: EH40
  • -
  • Wattage: 7200 Watt
  • -
  • Voltage: 240
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  • Amperage: 30.0 Amps per Pole
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  • Battery Backup: AA Alkaline
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  • Operations: Up to 42 On/Off Weekly
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Customer Questions & Answers

Customer Reviews

The product is great, easy to program.
MOISES RAMIREZ DIAZ
Works for both 115 volt or 220 volt pumps or hot water heaters.
Joseph l White
Easy to understand instructions and easy to install.
Phil F

Most Helpful Customer Reviews

49 of 51 people found the following review helpful By A Customer on December 17, 2008
Verified Purchase
Ever take one of those energy self-audits? Mine had high marks for the easy things- insulation, updated windows, weather stripping, etc. But my water heater- I cannot install the 'tankless', because I have no chimney. It has always been electric, but keeping 55 gallons hot all 24 hours is not efficient. So I ordered the Intermatic, and once installed outside the breaker panel, found it to be as easy to operate as a setback thermostat.
You can set it to heat up prior to morning showers, then (on weekdays) turn the power off, and heat up again in time for evening meals, cleaning, etc. Weekends can be an entirely different schedule. There is even a 'shutoff' feature to bypass the schedule while you take vacation. Instructions are clear, and programmed from the front.
I feel this is saving money (and more still when we get Time-of-Day pricing).
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19 of 19 people found the following review helpful By R. Saxton on December 30, 2010
Bought this model of timer about 3 years ago. It has failed. It is easy to install and use but the main power relay coil has failed and I can't repair it so I must order another one.
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23 of 25 people found the following review helpful By Moefugger on October 3, 2009
Verified Purchase
Easy to install.
Has timer settings for each day or the 5 day week with separate weekend settings which are what I use.
Can have several on/off setting on each of the days.
I set mine to turn off when I go to work and turn on when I get back so I can shower then turn off before I go to bed and come on just before I get up.
The water does not cool much while it is off since I do not use it then. When it does turn on it does not take much time to get the water back to the right temp.
There is also a manual on/off button just in case.
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10 of 11 people found the following review helpful By Toronto79 on June 29, 2011
Verified Purchase
I purchased this device, very skeptical of its return on investment. Here in Toronto, Ontario Canada, our government has implemented Time of Use hydro rates.

A breakdown of my own usage:

$0.10 - $0.20 average saved per weekday x 252 weekdays in a calendar year (minus stat holidays)
= $30+ dollars savings per year, minimum of 2 years to realize the initial Return on Investment. Weekends have marginal savings, due to the low TOU rate being used.

Install:

Quite simple, if you've performed electrical work in the past, and possibly have a relative in the family to describe the wiring procedure. It is advisable that you turn off the breaker or remove the fuse from the main electrical panel prior to installation. This should be a 240v circuit. Otherwise hire an electrician or you could fry yourself, the panel, and the water heater.

Programming:

Easy as sliced bread, as long as you can program an alarm clock, you're good to go on this one, just don't forget to return the lever to the 'run' position after you've programmed the device.

Maintenance:

Monitor your energy use, review the hydro bill, fiddle around with the programming to make the most efficient use of this device. Provides a good excuse to share a shower with the spouse, "Hun, we're conserving hot water in the process!"

Good luck, and enjoy the savings.
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7 of 7 people found the following review helpful By Paul on May 3, 2011
Verified Purchase
Pros: Good number of programmable events, master on/off override & it's accessible outside the box, the box can be locked (not so much of a plus for me, not what I was looking for), the relay contact circuit is independent of the timer power, light to show if the device is switched on or not, easy installation (one small exception, noted below), both braided and solid conductor jumpers included (depending on what type of wire you're working with external to the device), French & Spanish instruction stickers for the inside of the door provided, CSA approved.

Cons: The round knock-outs on the bottom and side of the box are a bit hard to actually knock out, the jumpers provided are a tad on the short side (read below).

Overall: The jumpers are indeed too short if you try to use them as depicted in the instructions -- they won't reach. However, they don't need to be installed that way. (See diagram)

A-B-1-2-3-4 -- A&B: Timer Power, 1&2 Contact 1, 3&4 Contact 2

IF you are using 240V (this model) for the timer and the contacts, the instructions say jumper A-3 and B-1 -- the jumpers are too short to go from A to 3. BUT if you jumper A-1 and B-3, they reach fine. They're still a tad short for my taste, but they will reach.

I love this product because we're on Time-of-use electricity billing now, and this device allows us to turn our 60-Gal, 4500 Watt electric hot water tank off during the day and on at night during the low rate times. We don't have Natural Gas out where we live or I'd switch the tank over to either a gas-fired tank or an on-demand type unit.

I'd be happy to respond to questions about the unit or installation.
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12 of 14 people found the following review helpful By Red Wine Fanatic on January 23, 2011
The timer is easy to install, but has an issue with some heater elements.
If your heater element creates a lot of electrical "noise", the timer may reset or stop working all together.
Calling Intermatic support will get you a set of filters that you will need to install, but
for our installation, did not help and still causes the timer to malfunction causing
you to take some cold showers...
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9 of 10 people found the following review helpful By commodore64 on September 2, 2011
Verified Purchase
This one worked fine but crapped out after 18 months (warranty only good for 1 year) At $62 a unit, it's questionable whether I broke even on electricity savings. A disappointment.
Updated Review:
I feel obligated to update my rating from two stars to four. The company's support was outstanding and I bought a replacement. I must admit the the first unit worked perfectly until it malfunctioned and my new unit is just humming along. I'm a satisfied camper.
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