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Moving warm air from a freestanding wood stove

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fergienewbee

01-22-2008 06:11:38

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We have a free-standing wood stove in our great room. We circulate the warm air using an ocillating floor fan placed to one side of the stove. My wife seems to think if she sets the fan on medium that it will push the air farther. It's about 35-40 feet to the opposite outside wall. The great room flows into the dining area with a nook at the end. The room is completely open. She was home all day yesterday feeding the stove, fan on medium, and complained it never warmed up above 67.

My thoughts are that the more warm air you try to push, the faster the warm air cools and drops. By using the low setting, the warm air stays up longer and you feel warmer. I turned the fan down to low and had it 72 in no time.

Am I right? Might be the first time in 24 years of marriage, so it's importatnt.

Larry

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Drafty

01-22-2008 19:20:30

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Have you ever sat in a bath too long and wanted to add hot water? Do you just add hot water to the faucet end and burn your feet or do you circulate the water around yourself with your hands to warm it up evenly to the other end of the tub? Your not getting the "hot" to the other end of your tub.
I think the other guys who suggested putting the box fan on the other end of the room are right. It will push the cold air towards the woodstove and the warm air will take its place. Set it on "Low". Fast moving air only feels drafty and heat needs time to warm all the objects in the room including yourself.
Your stove will "radiate" heat and move the air away from itself on its own. Its just that the heated air is cooling and falling from the ceiling before it gets to the back of the room.
A fan on the floor at the back of the room pushing the cold air toward the stove will force the air to make a complete cycle throughout the room instead of half of it.
Its always better to "pull" heat and "push" cold and it always feels more comfortable to move heat slowly or it will only feel drafty.

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dave guest

01-22-2008 17:09:18

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Before A/C when you got hot in summer, what did you do turn on fan. Moving air is cooler air. Airflow over skin reduces temperature. But you gotta have some circulation. Question is how much. As long as air is invisible, you gotta experiment. 12 years GM heating cooling tech. My OPINION. There were 10 of us taking care of 77 acres facility and we never totally agreed on anything.

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dave guest

01-22-2008 17:08:59

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

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Walt Davies

01-22-2008 11:02:29

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

I have been using ceiling fans since the late 70s and wouldn't have a house without one. Mine run 24/7 all year long up in the winter down in the summer. my house is 1871 and has been remodeled so that the living dining and kitchen are all the same area and even on a cold day its nice in all three rooms with my pellet stove. They cost so little to run that you won't even notice it on the bill but you will notice the difference 10 minutes after you turn it on.
Walt

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Nolan (foxtrapper)

01-22-2008 10:09:13

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Some years ago I had a house with a tiny woodstove in the living room. Learned quite a bit from that thing.

Woodstove alone, would heat that end of the living room.

Woodstove with blower, would heat that room and lightly heat the rooms around it.

Woodstove with blower and ceiling fans, would heat the entire house. Remarkably uniform heat to boot.

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flashback

01-22-2008 09:56:59

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Just my .04 cents worth(Inflati0on). Hot air rises to the top of the room and will stay there until forced down, Ceiling fans will be extremely helpful. Use two--- one to pull the hot air up and spread it across the room. The other to push the hot air down. Also, the reason your fan works better on low is called dwell time. The slower the air moves across the stove, the wormer it gets. This is used in central Heating/AC units where the fan runs slower in heating mode than when in cool. Cooler air needs to move faster to maintain humidity. Heating doesn't take that into consideration. This is just a basic answer. Ther are many more factors that can be involved. Jack

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Bob Kerr

01-22-2008 09:53:56

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

You say Great room so I am guessing it has a high ceiling. Most of your heat is at the ceiling, goes straight up from the stove even with the fan it still ends up there. If you can install a cold air return from the furnace at the ceiling level and set the furnace fan to run, it will do a world of good! I would do one that can be turned open in winter and closed in summer. I have a 2000 sqaure ft house with the older part built in 1880s. I have the 10 ft ceilings and transoms above the doors. There is a natural warm air draft that flows from the stove room to the other parts of the house with the cold air going across the floor back towards the stove room. The old part of the house stays toasty warm but the newer part in the back of the house with 8 ft ceilings suffers. I am freezing right now because my computer is in the new part. The house is narrow and long with the stove up in the older part. The furnace fan helps a lot. But I need to get my cold air return up near the ceiling so it can circulate the hotter air up at the ceiling level. The furnace fan running helps stir up the air so the floor isn"t as cold. If you light a cigarette or an inscence stick or something that smoulders and hold it up and watch the smoke, it will show you where the air is moving so you can work with it. Hold it up high and then in the same area hold it low and watch where the air goes. If you are going to just circulate the air in that room set the fan on the floor tipped back so it blows up and not pointed at the stove and run it on high, it will stir up the air enough to bring the warm back down.

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georgeky

01-22-2008 09:40:42

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Ceiling fan is the greatest heating aid ever invented for use of wood stoves.

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JDknut

01-22-2008 09:06:59

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

I have a Stirling engine powered fan that you put on top of the stove, and the heat powers the fan and it works like a champ with no electricity needed.

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Paul Simmer

01-22-2008 08:40:00

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

We used to live in a 24x44 modular home. Had an Ashley wood stove on the west wall. I could not PUSH the warm air more than half way to the other end of the house using a standard box fan. If I tried running the furnace blower, it would draw smoke into the house. On a whim, I put the box fan at the east end of the house pointed toward the stove. Running it on low, it worked great as others have said. It would push the cold air toward the stove, and draw heated air along the ceiling throughout the entire house.

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noncompos

01-22-2008 08:34:02

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

If it"s impractical or expensive to put in a ceiling fan, one of the "heat robbers"--a pipe that runs to the ceiling with a quiet little fan at the bottom, pulling hot ceiling air down and blowing it out along the floor, or vice versa, helps a great deal; in a pinch a small summer fan, on the floor, tilted straight up, helps get the heat back down.

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Sid

01-22-2008 07:30:57

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

"Am I right?" Is 72 degrees warmer than 67 degrees? Seems to me like the answer to your question is right there.

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Dave from MN

01-22-2008 07:16:55

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

The fan removes heat from the stove, keep the fan on a higher level, keep the stove stoked and at a HOT, but safe temp, as stated (if you have ine) turn on the central fan for a while. When they are on sale invest in a wood furnace that has a blower on it. Even if you cant duct it to your existing, they still will give you more heat than a none furnace type wood stove.

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Janicholson

01-22-2008 07:11:49

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Blowing air over the hot stove has thermal issues.
The more air the lower the temp of the stove. (the fan/s cool it) this however also reduces the temp of the blown air while actually taking away more heat quantity (BTUs) whth each volume of air being cooler and at higher velocity.
I found value in a used small blower from a trailer furnace (1/5th hp squirrl cage from a broken coleman gas furnace) blowing into a 3' long piece of 12" galvanized duct. I placed the blower above the stove to suck in heated air and blow it across the cieling so as not to blow on us, but hit against the far wall then down. The blower was set to operate on a snap thermostat (fan control switch) so it would stop when the fire was low or out reducing electric costs, and wind chill when the stove was out. JimN

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mjbrown

01-22-2008 07:10:26

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Let me suggest using the floor fan you have but put it on the far side of the room blowing toward the wood stove. You want to move the cooler floor air toward the hot stove and you will pull warm ceiling air to the far side of the room and down to the fan.

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ChrisB

01-22-2008 07:01:18

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Hate to tear apart your logic, but you mentioned the air "cooling off". If you are concerned about creating a cool draft then I can understand. If you are wanting to distribute the heat throughout the house, then the cooling off is what you would want is it not? Not like the hot air is cooling off outside the house.

I as many who have a wood stove with integrated fans (read engineered as such), I will never go back.

How about one of those automatic fans that sit on the stove and move the fan blade using the heat from the stove. Saves electricity and possibly a few nights in the dog house.

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Bob - MI

01-22-2008 06:52:27

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Ceiling fan would be the best way to do this. One thing to consider is the velocity of the air can make for drafty conditions. This can cool you off and it will reach a point where it defeats the plan.

So far as the air stream giving off heat too quickly I would offer that the goal would be to heat the cold air in the room and at some point faster would be ok.

Have you considered a compromise approach that would use 2 fans on low settings to move the air in a loop to and from the stove? It would give you a better circulation pattern.

If it doesn't work, blame it on one of these "idiots on that tractor site". Great backup plan to shield yourself from the wrath of the Mrs.

Best of luck.

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MF Poor

01-22-2008 06:38:10

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

$.02 worth of advice from someone who"s been married 40 years. Being RIGHT and proving it can be (and often is) more harmfull to your cause than being wrong.

Might be best just to sit there and be cold.

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supergrumpy

01-22-2008 06:39:37

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Re: Moving warm air from a freestanding wood stove in reply to MF Poor, 01-22-2008 06:38:10

AMEN

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TomTex

01-22-2008 06:29:43

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Turn your central heat system on to "Fan Only" operation. Circulates the warm air over the whole house. Do it all the time. Tom

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Dick Lemmon

01-22-2008 07:08:36

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Re: Moving warm air from a freestanding wood stove in reply to TomTex, 01-22-2008 06:29:43

My house is on a stinking slab. Cold air returns are in the ceiling and your idea works well for us. When we get a hot fire in the fireplace, by turning the furnace fan on we get heat thru out the house. When it is real cold it helps the furnace by adding heat to the system thru the cold air return. When I can get Dixie to cut some wood. (:^D

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coloken

01-22-2008 06:19:32

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Re: Moving warm air from a freestanding wood stove in reply to fergienewbee, 01-22-2008 06:11:38

Ceiling fan to get the warm air down from the top.

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