Intermatic EH40 240-Volt Electronic Water Heater Timer Review

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(More customer reviews)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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Switches - Timers, Counters & Panel MetersType: Electronic Time SwitchesContact Rating: 30@240VAC

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Intermatic WH40 Electric Water Heater Timer, Grey Review

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(More customer reviews)Easy to put on a wall, easy to hook up, doesn't make a sound. Important, when you take the insides out to mount, this is done by depressing the spring clip on top, and lift and pull out. Reassembly is reverse, but you have to make sure the side/bottom edges are behind the stops. If your not back and down all the way, the insides will seem loose and the timer will/could make noise, has you may read about in other reviews.
Our timer has not been mounted and running long enough to figure the savings, ours is set to run two hours in the morning and two hours in the evening. Our water heater, stays hot all day, every time we use water we got hot water all day and night when it is off mode. I am sure this will show great savings!!

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- External override switch - May be able to save if "time of day" rates are used in your area - Heavy duty 40 amp rating - Easy to install - Easy to program - Supply hot water only when you need it - 10,000 watts, 40 amps, 250 volts, 60Hz capacity

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Intermatic WH21 Electric Water Heater Timer Review

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(More customer reviews)
This product is easy to install if you know what you are doing.
You should have some background in electrical ampacity and wiring basics.
I did have to purchase an additional pigtail.(flex tubing with 3 #10 color coded wires, and 1/2 connectors on each end about 5 feet total length)
The heater had the wiring flex tubing direct from the wall to the top of the heater. The additional material was about 10.75 at the local hardware store.
I unhooked the wiring from the heater and wired it to the timer, then wired the new pigtail to where I had disconnected the original wires.
The timer has knockouts on the bottom for either 1/2 or 3/4 inch connectors so if it will accomodate either one. You most likely will have 1/2" connections.
Make sure you turn off the breaker before you start.
The entire process took about an hour total.
The instructions that come with the timer aren't that great, so if you don't know what you are doing, it won't help much.
The timer comes with 3 sets of on/off clips so you can time it on and off 3 times.
We set it at on at 5 am, off at 8 am, then on at 8 pm off at 10 pm.
So the timer is on 5 hours a day and off 19.
We figgure we will save around 25 dollars a month off the electric bill.
So... it will take at least 2 months to pay for the timer and other materials we bought. If you pay someone to install it, it will take much longer to pay for itself.
So far, it is working properly and so I am satisfied.

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Automatically schedules hot water only when needed. Turns water heater On during high-use periods; Off during low-use periods. Can save up to 33% on water heating costs. Up to 12 On and Off settings per day. External manual override switch. On indicator light. 240V/6250W, 60Hz. UL listed.

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