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Posted by Scott Townsend on March 5, 2008, 8:46 am
Thanks guys.
Since this is a 'rental' and its only 520 SqFt (the whole unit, not just the
one room) I'm thinking the 1500 watt unit should be fine. The Last tenant
had a portable 1500 watt radiant oil filled heater and they usually put it
on 1500 watt for a bit to take the Chill off, then set it to 700 watt to
maintain.
Being that I've just finished building a house I'm not really interested in
spending much time and effort on this small rental. So I'm looking for
something that I can Fix to the wall/ceiling and hard wire in so I can meter
it (along with the Stove and a few other things) so we can charge for it.
The other Outlets are not on the Meter. (if you really want to know why, I
can explain, but...) Quick and Efficient. (-;
There is no Fireplace or any roof penetrations, so back to the quick and not
wanting to spend time, I don't think a fireplace/pellet stove is in my
future.
Wait, We'll be putting in an Electric Oven.. What if I get one with
Convection? Have her turn on the Oven and the Convection fan... Adjust the
baking tem to what she wants the room to be? (-;
Scott<-
>
>>I expected more grief then that! ;-P
>>
>> The old units look like this: http://tinyurl.com/ywbnz2
>>
>> Pretty hideous.
>>
>> If its all Apples to Apple, So maybe something like this then?
>> http://www.iap-home.com/index.cfm?fuseaction=product.display&Product_ID=1788
>>
>> I do like this unit though... Seems like the Hydronic would be more
>> efficient though.
>> http://www.iap-home.com/index.cfm?fuseaction=product.display&Product_ID=1798
>> Waste the Energy heating the oil, then the oil still retains the heat.
>> Exhaust heaters once they are off, you are done...
>>
>> Scott<-
>
> Let's start with the basic physics. It takes "x" amount of heat to make
> the room comfortable. For example, you may need 5000 Btu per hour given
> the outdoor temperature to maintain 68 degrees. If electric, that will
> be 1500 Watts per hour. That means the heater will run 100% of the time.
> Buy a 3000 watt heater and it will run 50% of the time.
>
> Next is efficiency. All electric heaters are 100% efficient. All the
> heat made by resistance is going into the room the heater is located. Gas
> or oil heaters need to be ventilated so from a few percent to 30 percent
> of the heat may be going up the chimney. In most areas, electric is the
> most expensive form of energy. Here in New England, we pay 17¢ or so per
> kWh.
>
> So, why choose one heater over the other? If you need that 1500 watts of
> heat on the coldest day and the heat is on al the time, it may be nice and
> comfy and cozy. if, OTOH, it is a 3000 watt heater it will run only half
> the time so there will be some variations of room temperature as the
> heater cycles off and on. How often id determined by the range of the
> thermostat. Good ones will turn the heat on, then off, with a tiny
> temperature fluctuation. On at 67.5, off at 68.5. Cheap ones may turn on
> at 66 and off at 70.
>
> The hydronic heaters are filled with a liquid adding thermal mass, just
> like the radiators of years past. It took a little for them to get hot,
> but once the boiler stopped, they kept giving off heat for some time
> keeping the room steady and gently heated. In any case, the heat is not
> wasted, it is just distributed over a longer time period and you tend to
> feel more comfy.
>
> If you want to save money, I'd first seal up and insulated as best you
> can. I'd also look at alternative fuels, such as propane or wood pellets.
> They may or may not be cheaper or as convenient. There are web pages that
> allow you to put in the cost of fuels and do comparisons.
>
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