Question about Intertherm Heating & Cooling

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Posted on Jan 02, 2017

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Generally NO.

But...it Depends on amp rating of timer, wattage of water heater, and line voltage.

Look at label on side of heater for watts.

Electric water heater will work on any voltage.

1) Start with 120 Volt outlet::

Volts x amps = watts

Watts divided by volts = amps

Let's say outlet is 120Volts. Lets say water heater is rated 4500 watts.

4500 divided by 120 = 37 amps

There is NO plug-in timer rated for 37 amps.

Let's say water heater is rated 900 watts.

900 divided by 120 volts = 7.5 amps

Yes. The Intermatic HB113 timer will handle up to 8 amps.

http://waterheatertimer.org/Intermatic-timers-and-manuals.html#appliance

2) 240 Volt outlet

Same calculations as above.

1900 watt element divided by 240 volts = 8 amp.

Yes, the Intermatic HB112 timer will safely handle that element.

3) Here are some water heater timers:

http://waterheatertimer.org/Compare-13-electric-water-heater-timers.html

4) Here are some off-peak water heater ideas.

http://waterheatertimer.org/Off-peak-water-heater-ideas.html

But...it Depends on amp rating of timer, wattage of water heater, and line voltage.

Look at label on side of heater for watts.

Electric water heater will work on any voltage.

1) Start with 120 Volt outlet::

Volts x amps = watts

Watts divided by volts = amps

Let's say outlet is 120Volts. Lets say water heater is rated 4500 watts.

4500 divided by 120 = 37 amps

There is NO plug-in timer rated for 37 amps.

Let's say water heater is rated 900 watts.

900 divided by 120 volts = 7.5 amps

Yes. The Intermatic HB113 timer will handle up to 8 amps.

http://waterheatertimer.org/Intermatic-timers-and-manuals.html#appliance

2) 240 Volt outlet

Same calculations as above.

1900 watt element divided by 240 volts = 8 amp.

Yes, the Intermatic HB112 timer will safely handle that element.

3) Here are some water heater timers:

http://waterheatertimer.org/Compare-13-electric-water-heater-timers.html

4) Here are some off-peak water heater ideas.

http://waterheatertimer.org/Off-peak-water-heater-ideas.html

Oct 31, 2012 | Hardware & Accessories

Home Depot carries I believe 2 different T-stats , wall mount, and unit mount. Try there. Or you will need to get it touch with the manufacturer. Also have info, 120 or 240 volt.

Mar 06, 2011 | QMark Portable Hydronic Electric Baseboard...

Go to lowes or home depot and buy a properly rated switch and install it. Make sure to check the device and get its watts, amps and or volts before you go as they will want at least 2 of those items. Watts and amps or volts and watts or amps and volts.

Jan 27, 2011 | Honeywell Heating & Cooling

Its probably not a bad idea. Thats alot for a 100A panel to handle, a range needs a 50A, a water heater needs 30A, and the heat will need a 50A or a 60A breaker... Plus whatever else is in the house will be a bit more than the 100A service can handle. But if you don't have the money it will do for a while because for the most part they won't all be pulling at the same time. Word to the wise get at least a 30 space panel when you upgrade, I always install a 40 space panel because for the cost difference its well worth it for future needs because you'll fill it up quicker than you think and you'll have space for anything else you may want to add later on. Hope I helped

Dec 09, 2010 | Your One Source Homeline Circuit Breaker

depends upon wattage of baseboard. I would guess about 20 -30 amps. Amps = Watts/Volts. Example, 1500 watts/220 volts = breaker size of 6.8 amps (add 25%) The only breaker available is a 15 amp breaker.

Oct 05, 2010 | Heating & Cooling

hi the heaters are some times filled with glycol which may be what you have , you can look this up on google and see what is in it

Mar 08, 2010 | Cadet Manufacturing CADET Softheat...

the baseboard heaters out put goes down a lot more than you would think when used on 120 volts ... thats because not only is the voltage half of what it should be, the current is also half .. so the total power (the product of voltage and current) is one fourth of what it would be if operated on 240 volts .. you are operating at only 186 watts instead of the 750 watts you should have .. so you would have to have 4 times as many heaters for the same heat output .. you likely have the 240 volts available (most houses do) .. there are two phases .. each 120 volts .. when both phases are used together then you get the 240 volts total .. another option is you can use heaters designed for 120 volts .. the current would increase to a little more than 6 amps per heater .. some heaters have a jumper you can move for 120 volt service or 240 volt service... you can use those with either voltage ..

Sep 12, 2009 | Fahrenheat Electric Convector Baseboard...

The conversion of Amps to Watts is governed by the equation

Watts = Amps x Volts

For example 1 amp @ 110 volts = 110 watts

your case 7 amp @ 120 volts = 840 watts

unless you are running it at 230v but I don't think you can

I would look for one rated for Volt-Amps instead of watts

It's best to round up to be safe add 40 - 60 watts

Don

Watts = Amps x Volts

For example 1 amp @ 110 volts = 110 watts

your case 7 amp @ 120 volts = 840 watts

unless you are running it at 230v but I don't think you can

I would look for one rated for Volt-Amps instead of watts

It's best to round up to be safe add 40 - 60 watts

Don

Apr 25, 2009 | Kirby Ultimate G Bagged Upright Vacuum

HERE YOU GO CALCULATE THE HEAT @ 10 WATTS PER SQUARE FOOT , TAKE THE LENGTH X WIDTH X 10 AND THIS WILL TELL YOU THE AMOUNT OF WATTAGE YOU NEED . MOST ALL BASEBOARD HEATERS ARE RATED @ 250 WATTS PER LEN FT AS TO SAY A EX. A 4FT HEATER IS 1000 WATTS , MOST OF THE THERMOSTATS ARE RATED @ 20 AMPS AS IS THE 12-2-WG WIRE TO RUN TO HEATERS AND THERMOSTAT DIVIDE THE TOTAL WATTAGE BY THE LINE VOLTAGE USUALLY 240VOLT IN US .AND THIS WILL TELL YOU THE CURRENT DRAW ----WHICH CANNOT EXCEED 20 AMPS ON 12-3-WG AND THAT IS THE LIMIT OF THE THERMOSTAT AS WELL THESE STATES APPLY 99% OF THE TIME I DO REALIZE THERE ARE EX BUT HAVE USED THESE FORMULAS FOR 35 YEARS OF DOING MY WORK AND THEY DO FINE

Dec 16, 2008 | Fahrenheat Electric Convector Baseboard...

if the heater is 120 volt or 240 volt its really pretty easy. at either end is a cover. remove the cover and you'll see a wirenut or maybe just two wires. one side has an integral thermostat. connect your supply to the two wires on the thermostat. connect the other end in your breaker box with the appropriate sized circuit breaker. wire size feeding it will depend on its current draw. how many watts is the heater? 1500 watts will draw 6.25 amps at 240 volts so you can use 14 ga wire. 2000 watts will draw 8.3 at 240 volts - so 14 ga is still ok. 2500 watts at 240 draws 10.41 amps. 3000 watts draws 12.5 amps at this stage I'd use 12 gauge on a 20 amp breaker.

Oct 25, 2007 | Fahrenheat Electric Convector Baseboard...

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