Fan or no Fan

Re: Fan or no Fan

PostBy: Millworker On: Mon Dec 22, 2008 11:28 pm

This fan doesn't use any electricity: http://www.plowhearth.com/product.asp?section_id=0&department=0&search_type=normal&search_value=fan&cur_index=&pcode=9671

Not sure if it is a gimmick or not, just thought it seemed like a good idea. I am not using any fan by the way, but would like to try one some day.
Millworker
 
Stove/Furnace Make: Startford
Stove/Furnace Model: SC100

Re: Fan or no Fan

PostBy: Ashcat On: Mon Dec 22, 2008 11:40 pm

grizzly2 wrote:I gotta believe one of you guys know the answer to my question in the previous post. :help:

I wait with you on an expert's answer to this question, but I'd be willing to bet that the answer is yes, you do save electricity when you lower fan speed. How do I "know"? Because the speed controller I have doesn't get warm when I lower the speed--if the same amount of energy were flowing into the controller/fan, I believe the controller would shed that excess energy as heat, which it doesn't. (I can almost hear the electricians laughing at my reasoning--even if the right answer is "Yes, you do save electricity", I may be way off base with my reasoning. :? )
Ashcat
 
Hand Fed Coal Stove: Hitzer 983
Coal Size/Type: Nut/Blaschak

Re: Fan or no Fan

PostBy: MountainPreacher On: Tue Dec 23, 2008 2:37 am

Heish1 wrote:My Harmon Mark II of course has a fan. My question is, does everyone leave their fan running 24/7? Sort of defeats the purpose of saving $$'s in my opinion. But neverless, I leave mine running. This weekend I may unplug it to see what difference it will make for the rest of the house.
Anyone have an opinion on this?


I have the same stove and love it. The fan runs all the time - EXCEPT - for when I am shaking/cleaning out the ashes, then it is definitely uplugged! This greatly helps to keep the coal dust down BIG TIME. Otherwise it is plugged in and gives tons of heat and really doesn't use much electric. Be sure to oil it in the two holes from time to time :)
MountainPreacher
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnafire Mark II

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Re: Fan or no Fan

PostBy: Pete69 On: Thu Jan 08, 2009 8:09 am

Another thought is that a stove designed with a fan usually but not always utilizes a heat exchanger that captures the heat put off by the fire and is blown off by the fan. If you turn the fan off the extra heat build up in the exchanger could get excessive and warp or damage the exchanger unless the stove is ran at a lower temp.
Pete69
 
Stove/Furnace Make: Baker/Vermont Castings/Chubby
Stove/Furnace Model: fireside /VigilantII/Chubby

Re: Fan or no Fan

PostBy: Gary L On: Thu Jan 08, 2009 9:18 am

I am not an electrical wizard but I do believe there is a major difference between motors designed to run at variable speeds and ones designed to run at one speed. Adding a dimmer switch to a motor rated for a constant speed might not be a very good idea. To the best of my knowledge, variable speed motors have completely different windings for the varying speeds.

Others here might be able to explain the internal properties but a motor designed to run t 1750 or 3400 RPM should not have the voltage reduced in an effort to control the speed.

Gary
Gary L
 
Hand Fed Coal Stove: Russo #1
Stove/Furnace Make: Russo

Re: Fan or no Fan

PostBy: captcaper On: Fri Jan 09, 2009 8:57 am

I run my Mark III 24/7 since it is tied into a ducting that supplies heat to upstairs. Furnace doesn't turn on so electricty used there either. From what the others say about $5 a month I'll leave it on for sure.. I do oil it once a month.
captcaper
 
Stove/Furnace Make: Harman Super Magnum
Stove/Furnace Model: Super Magnum Stoker

Re: Fan or no Fan

PostBy: grizzly2 On: Fri Jan 09, 2009 10:57 pm

I wait with you on an expert's answer to this question, but I'd be willing to bet that the answer is yes, you do save electricity when you lower fan speed. How do I "know"? Because the speed controller I have doesn't get warm when I lower the speed--if the same amount of energy were flowing into the controller/fan, I believe the controller would shed that excess energy as heat, which it doesn't. (I can almost hear the electricians laughing at my reasoning--even if the right answer is "Yes, you do save electricity", I may be way off base with my reasoning. )

Ashcat, I'll bet you are correct. I know at least older light dimmer switches had fins on them to disipate unused electrical energy. My Hitzer came with a reostat which the fan plugs into. That reostat doesn't get warm either.

Gary, see above comment, and so far so good with the fan operation. I have read that light dimmers should not be used with fans, but I have purchased a reostat in the past that was made for fans. I ran a box fan on it for years for my woodstove.
grizzly2
 
Hand Fed Coal Stove: Hitzer 30 - 95
Coal Size/Type: pea and nut/ anthracite
Other Heating: Jotul #3 wood stove in garage. Oil backup in house. Electric backup in house.

Re: Fan or no Fan

PostBy: MountainPreacher On: Tue Jan 13, 2009 7:05 pm

captcaper wrote:I run my Mark III 24/7 since it is tied into a ducting that supplies heat to upstairs. Furnace doesn't turn on so electricty used there either. From what the others say about $5 a month I'll leave it on for sure.. I do oil it once a month.


Wow, are we supposed to keep those oiled that often? I oil mine once a season. How many drops of oil in and what weight are you using?
MountainPreacher
 
Stove/Furnace Make: Harman
Stove/Furnace Model: Magnafire Mark II

Re: Fan or no Fan

PostBy: Gary L On: Tue Jan 13, 2009 7:39 pm

Millworker wrote:This fan doesn't use any electricity: http://www.plowhearth.com/product.asp?section_id=0&department=0&search_type=normal&search_value=fan&cur_index=&pcode=9671

Not sure if it is a gimmick or not, just thought it seemed like a good idea. I am not using any fan by the way, but would like to try one some day.


I'm not sure I would wait too long for it to move the air very far but the concept is correct. It might take years to recoup the initial investment but it sure will look pretty cool on top of your stove and cost nothing more.

Oiling your electric fan motor is a good idea and I use a drop or two of standard 30 weight 3 in 1 oil every month. I also keep a close watch on the cooling slots because I have pets and hair and dust that could block the cooling slots is a real bad issue for the fan motor.

Gary
Gary L
 
Hand Fed Coal Stove: Russo #1
Stove/Furnace Make: Russo

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