Mounting a blower behind a stove?

[tjcole50]

Anyone had any luck with this? I have searched and did not find much info. But my stove has a rear heat shield which pulls natural convection and wondering if mounting a blower behind the top of the wood stove inside the fireplace back wall and having it blow across the top of stove would be beneficial? Current blower being lackluster here but was thinking a lower rpm blower mounted there could do some good. I would not run two blowers but just an idea. Someone has had to of done this before?

 

[BrotherBart]

Not any sane ones.

 

[branchburner]

You could try this: put a fan on the floor, to the front and side of the stove, pointing towards the back wall of the fireplace. You will be moving cool floor air in and pushing out a blast of warm air from the space within the fireplace that is being heated by the stove. I was amazed at how much that helped the air movement and heat transfer in my setup.

 

[tjcole50]

Not any sane ones.

What is the negative to doing this?

 

[BrotherBart]

Oh I don't know. Maybe putting an electric appliance over a stove that can sometimes decide to go up to 800 degrees and the fan sucking in no cold air, just the hot stuff from the stove. And then the cord melts...

Do it and get back to us.

 

[tjcole50]

Talking after stove gets scooted out a blower would be put in back top of fireplace not directly on or directly above the stove itself
Just curious how that would compare to the blower being mounted directly to the rear really

 

[tjcole50]

Can't load a video for some reason but I have a great secondary combustion shoe going on right now. Fire doing circles on top of itself puts on a great show

 

[JA600L]

The idea of pointing a fan towards the front side of the stove may not be very effective because of the heat Sheilds but idk

 

[rwhite]

A few reasons why this is a bad idea.
1. Heat. The area where the current blower is installed is relatively cool. You mount another blower inside the fireplace and above the fire box and it probably won't last one burn, or it will be the last burn you ever do when everything melts and burns the place down.

2. The natural convection which you spoke of. This occurs because there is a heat differential between the bottom of the stove and the top (inside the jacket). As the top heats up cooler air is drawn in from the bottom. As everything starts to heat up kind of equally that convection becomes less of a factor. A low CFM blower allows that differential to be maintained but doesn't move enough air to cool the top of the stove and negate the process. Your not dealing with a forced air furnace. Although the blower will move hot air into the room that is just a secondary benefit of what they are designed to do. They are designed to just barely keep air flow moving along.

3. Generally will be a mess. There are no filters and it is not a closed system. A high CFM fan will draw in every bit of ash, dust and dirt from around it and blow it out into the room. You will have dust everywhere. Not to mention to the first time you forget to shut the fan off and open the door. Although I doubt it would last that long to see that happen.

 

[tjcole50]

Sounds like a no go. I did see one thread can't remember but the guy had a jotul and set a regular hamster cage blower in various positions through his fireplace with success . His was on the bottom pointing up in the fp. Guess I'll leave her how she is. Everyday the burn technique gets better and I am enjoying my work and purchase more. Can't help the curiosity of improving something if possible. Aren't we all this way with our projects?

 

[mellow]

Aren't we all this way with our projects?

Before reverse engineering something think about it's intended purpose.

 

[tjcole50]

Before reverse engineering something think about it's intended purpose.

To blow air off of hot surfaces....... Changing positions/directions etc could improve its function seeing how it's not currently being used in a manufactures desired setting ( tucked into fireplace opening with legs cut down by 4")

 

[branchburner]

. His was on the bottom pointing up in the fp.

So maybe the function was pulling in cool air, not just pushing hot air with hot air.... maybe like trying to push a rope?

 

[brenndatomu]

You could try this: put a fan on the floor, to the front and side of the stove, pointing towards the back wall of the fireplace. You will be moving cool floor air in and pushing out a blast of warm air from the space within the fireplace that is being heated by the stove. I was amazed at how much that helped the air movement and heat transfer in my setup.

Yup, this is how I do it, (2 small computer fans, read: not a ton of air flow, but works well) but I've already posted that in two other threads for OP to see, I'm 'sposin he don't like the idea. He's hung up on needing gale force winds coming off the top of his nc30 so it can push heat out into his cathedral ceiling room.
This makes better sense to me though, a fan out front, blowing cool air into a blind hole, (the fireplace) where it's hot, equals hot air out the top. Heat into a room will rise, BUT, heat trapped at the ceiling will work its way throughout the room, over time, if circulated by a ceiling fan and/or a fan on the other side of the room blowing cool air toward the stove.
Just my educated opinion, a fan in the top-rear of the FP will last about 1/2 hr before meltdown, or right up to 'bout the time you get to operating temp on the stove. Heat is the arch enemy of any electric motor.
Glad to hear ya got the secondarys cranked up tj, you ever take a stove top temp reading?

 

[Highbeam]

if you would pull that 30 out of the brick prison and out onto a hearth as God intended then you could really get some fans blowing on it.