Intermatic WH21 Electric Water Heater Timer

Other products by Intermatic

Product Description

From the Manufacturer

Intermatic's Electric Water Heater Timer Switch will automatically schedule hot water when needed. This time switch will repeat a preset schedule daily except when the external manual push button is used. This manual button permits the user to turn the water heater on and off ahead of the schedule. The time switch will resume the reset program by the next scheduled operation. This devise turns the water heater on during high use periods; off during low use periods. It has up to 12 on/off settings per day. The capacity is 25 amps, (6250) 250 volts, 60 Hz.

Product Description

25A, Water Heater Timer, Electric, External Switch, On/Off Indicator Light, Single Pole, Single Throw, 6,250W, 250V.

Product Details

• Product Dimensions: 6.8 x 5.6 x 3.2 inches ; 2.1 pounds
• Shipping Weight: 2.1 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
• ASIN: B00002N5FP
• California residents: Click here for Proposition 65 warning.
• Item model number: WH21
• Average Customer Review: 3.9 out of 5 stars  See all reviews (26 customer reviews)
• Amazon.com Sales Rank: #1,673 in Home Improvement (See Bestsellers in Home Improvement)

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Customer Reviews

Most Helpful Customer Reviews

14 of 15 people found the following review helpful:

4.0 out of 5 stars Great for electric savings, November 11, 2007

By	C. Holzwarth (LOVETTSVILLE, VA USA) - See all my reviews (REAL NAME)

I purchased one of these. I have it set to turn the water heater off between 11:00 PM and 5:30 AM. I save the cost of this every month in electric savings. A worthwhile addition to a house.

9 of 9 people found the following review helpful:

4.0 out of 5 stars Hot water heater timer, March 11, 2009

By	Keith Hellwig "Helldigger" (Phx AZ) - See all my reviews (REAL NAME)

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.

9 of 9 people found the following review helpful:

5.0 out of 5 stars Intermatic WH21 Electric Water Heater Switch, November 11, 2007

By	Mad Scientist (Back hills, TN) - See all my reviews

The WH21 Electric water heater switch is the best thing to happen to an electric bill, my was cut 33% and we always have hot water, but this controler will only last 12 years and we still have the same water heater
but had to replaced heater elements twice so far, to bad Intermatic did away with this model, maybe it lasted in the field too long for them.
now if only I could find something to save 33% car gas.....