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Intermatic WH21 Electric Water Heater Timer | 
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| Brand: Intermatic
Category: Home Improvement
List Price: $74.49
Buy New: $34.69
You Save: $39.80 (53%)
New (5) from $34.69
Rating:  36 reviews
Sales Rank: 2991
Media: Tools & Hardware
Number Of Items: 1
Shipping Weight (lbs): 3
Dimensions (in): 6.8 x 5.6 x 3.2
MPN: WH21
Model: WH21
UPC: 078275007024
EAN: 0078275318359
ASIN: B00002N5FP
Availability: Usually ships in 1-2 business days
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| Features:
| • | Automatically schedule hot water when needed | | • | Turns water on during high use and off during low use periods | | • | Single pole/single throw | | • | Capacity: 25 amps (6250), 250 volts, 60 Hz. |
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| Editorial Reviews:
Product Description
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 l
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| Customer Reviews:
Showing reviews 1-5 of 36
 Money saver! March 8, 2010
Diana L. Evans
This has saved us money, and that is why we got it. Simple to install,and you can adjust it to turn it on or off, 3-4 times a day, or more.
Electric Water Heater Timers February 24, 2010
John M. Moore
With energy costs increasingly an issue I looked on-line Amazon for 2 electric water heater timers to reduce household energy consumption. Found 2 together in a short time at the price of one at local stores and with free shipping. Thanks Amazon.
As Advertised February 22, 2010
Billy J. Edmonson
This does exactly what it's supposed to. I installed this in less than an hour. Of course, I have some electrical experience. Don't know if it will save me a lot of money but it's nice to know that we are no longer wasting energy. So far I'm very pleased with my purchase.
Paying too much for hot water? February 22, 2010
T. Morris (Idaho)
I purchased this item about one year ago for $32.99 with Free Shipping and it's one of the most effective, cost cutting items I've ever installed in my total electric home... other than thermal underwear and hoodies. This may not be the answer for everyone but here's what I liked, and didn't, and I'm a former electrician.
*First, it turns your water heater off and on but it does not shut off all the electric to your heater. To turn off the electric elements on a 220v system you only need to break on of the two 110v lines so that still leaves the other line "hot". Turn the power off at the panel whenever you work on it. a double pole/double throw switch would have been better but would add to the cost.
*This won't help much if you like to keep your water really hot and on all day long. Try setting the thermostats down to 110-120 degrees... make sure you set both the upper & lower elements to the same temp... a larger tank will have one at the top and another one at the bottom.
*There are many settings so you can have it on and off pretty much anytime you desire. We only need hot water for a few hours in the evening so it's been a real saver for us.
*It's a tight wiring enclosure and not easy to wire but you can do it with a little patience.
*Instructions are poor but it's not hard to install and set.
*There's a manual override button on the panel surface so you can turn it off and on anytime you want without opening the cover and changing the settings... the settings will continue as normal.
*There's a red light that lets you know when your water heater is on.
*It can be installed anywhere in the electrical line from the panel to the heater... the closer to each the easier it is since wire doesn't stretch very well... and you may not even need to purchase a short piece of 10/3 if there's a little slack at one of the ends.
*Intermatic has been making some of the best timers for lots of years and this should last a lifetime.
In summary, it paid for itself in the first month and there's little energy use in keeping the electric clock running. If you think you're not wasting money keeping your hot water tank at maximum temperature while you're sleeping or not at home then this isn't for you. If you'd like to save some serious bucks on electricity and spend it on something else like heat then this is about the best investment you can make for the buck. We line in one of the cheapest electric rate areas in the country and this was a no-brainer for us!
 very difficult to install with #10 wire February 16, 2010
Hex92 (Virginia)
I finally got around to installing this thing last weekend. So I haven't had it long enough to make any comments as to the amount of money I have/will save. What I can tell you though is this box is TIGHT. Not 'tight' meaning "Damn that tricked out Mustang is tight!" I mean tight like there is hardly any room in the box to make your connections.
If you are hooking up a small water heater that uses #12 wire it will be OK. But I had a hard time fitting #10 in there. There just wasn't enough room to bend the wire and hook it up to the terminal screws. I managed to do it eventually, but there was a lot of cussing involved.
So if you like getting mad and frustrated while installing things go with the WH21. Knowing what I know now....I would buy the WH40. It looks to have a larger space for your wires.
Showing reviews 1-5 of 36
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