Thermostats for 1000w baseboards

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pppp1500
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Thermostats for 1000w baseboards

Post by pppp1500 » Tue May 21, 2019 7:04 am

Hello

I live in an apartment and wanted to change the old thermostats (not even digital).

I didn't notice I've bought 3800w electronic thermostats as a replacement but they would only control one 1000w baseboard each (1 per room with its own thermostat).

Will it still be ok ? Will the thermostat operate fine even if it is made for much more than 1000w ?
It won't lack precision or anything ?

They are too old for returning at the store, but I should I buy new ones ?

Thanks

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Aaron
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Re: Thermostats for 1000w baseboards

Post by Aaron » Tue May 21, 2019 5:27 pm

I'm going to say it's not likely compatible. The 1000W heater is likely 120V and your 3800W-rated stat is for 240V heaters.

The stats should have specs on a label affixed to them or on the mounting plate. Check those out and compare.

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emtnut
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Re: Thermostats for 1000w baseboards

Post by emtnut » Wed May 22, 2019 8:00 am

I agree with Aaron that it would be good to check the old t-stat (or preferably the baseboard itself)

There are many 1000W 240V baseboard heaters, so I'd think you're OK.

As for the 3800W rating, that is just the maximum allowable wattage. Your 1000W would be fine with this.

One other thing you need to check, is if the old one was 1 or 2 pole. The new one needs to be the same. Post a pic of the wiring if you're not sure.
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pppp1500
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Re: Thermostats for 1000w baseboards

Post by pppp1500 » Wed May 22, 2019 9:54 am

of course, it's all 240v heaters... I live in Canada, who would heat his home all winter using 120v ??? lol

that's all ok, i was just wondering if a thermostat with lower rating would give a better quality in temperature control. but I've never seen any evidence or information about this... you're probably right it will be the same and all fine.

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Aaron
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Re: Thermostats for 1000w baseboards

Post by Aaron » Wed May 22, 2019 3:31 pm

pppp1500 wrote:
Wed May 22, 2019 9:54 am
of course, it's all 240v heaters... I live in Canada, who would heat his home all winter using 120v ??? lol
Down here in the states, baseboards are often not the primary source for heat, they're more of a "boost" or alternative to an HVAC or boiler system. So it's common to see 120V baseboard heating. So I profess ignorance to Canadian practices in that regard.
pppp1500 wrote:
Wed May 22, 2019 9:54 am
that's all ok, i was just wondering if a thermostat with lower rating would give a better quality in temperature control. but I've never seen any evidence or information about this... you're probably right it will be the same and all fine.
No, because electric heating cycles on/off, like HVAC. Stats are sort of "dumb" devices that operate according to the temp sensor.

Heat pumps and other systems probably have a little more logic to them, but they too are really just on/off as well.

pppp1500
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Re: Thermostats for 1000w baseboards

Post by pppp1500 » Wed May 22, 2019 3:46 pm

I am no expert at all... but anywhere you are, it's much better to use a 240v heater.
and are you really sure they are on/off ?
when operating the thermostats show a power level, from 0 to 4 bars.
i think it's modulating the power in function of how far the room temperature is from the set point.
again no expert here, but a baseboard is not a compressor at all. a big resistance only.

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emtnut
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Re: Thermostats for 1000w baseboards

Post by emtnut » Wed May 22, 2019 4:59 pm

pppp1500 wrote:
Wed May 22, 2019 9:54 am
of course, it's all 240v heaters... I live in Canada, who would heat his home all winter using 120v ??? lol
There is no difference between a 1000W 120V and a 1000W 240 volt. The current will be higher with the 120V, so a larger wire is needed, but the power (and heat output) is the same.
Because of the smaller wiring with 240V, that is what is most common. But many apartments have 120V auxiliary heating.
pppp1500 wrote:
Wed May 22, 2019 9:54 am
... you're probably right
Heh heh ... You kill me :lol:

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emtnut
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Re: Thermostats for 1000w baseboards

Post by emtnut » Wed May 22, 2019 5:04 pm

pppp1500 wrote:
Wed May 22, 2019 3:46 pm
I am no expert at all... but anywhere you are, it's much better to use a 240v heater.
and are you really sure they are on/off ?
when operating the thermostats show a power level, from 0 to 4 bars.
i think it's modulating the power in function of how far the room temperature is from the set point.
again no expert here, but a baseboard is not a compressor at all. a big resistance only.
Most t-stats are on off. There are some modulating versions. They can control the heat closer to the setpoint, but do not offer ANY savings. Heat is watts ... can't change that.
Those t-stats do vary the power out, but only to keep the temp close to the setpoint. The on/off t-stats are around 1 to 1.5 ˚ variance from the setpoint.
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pppp1500
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Re: Thermostats for 1000w baseboards

Post by pppp1500 » Wed May 22, 2019 5:34 pm

overheating = waste
so of course, they do offer saving when modulating... not much maybe around 10-15% i think

I meant : in Canada it is very usual to put many baseboards wired together in the same room, so of course there is advantage in using 240v.

And. I always thought that the material was more efficient at higher voltage/less current (less loss), but that might not be true for baseboards.

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Aaron
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Re: Thermostats for 1000w baseboards

Post by Aaron » Wed May 22, 2019 9:53 pm

Of course! :D :mrgreen:

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