Tip & How-To about Heating & Cooling

Outdoor Wood Stove Hot Air or Hot Water

You're getting a new wood stove and you have many decisions to make. Other than brand, you need to decide whether you will use hot air or hot water to get the heat from the wood stove to the living space.

If you have a hot water heating system already installed then you obviously need to have a water stove. If you are thinking about what to install in a new home or already have hot air then you need to consider what will be the best option for you.

Now if you are installing a new system then you want to go hot water. That is by far the best way of heating and will be the best way to heat using an outdoor wood stove. Hot water heating is one of the best ways to get great heat transfer from the fire to the water to the air.

If you have hot air heat and want to heat with wood then you can install a wood hot air furnace, and set it beside your existing furnace. The ductwork will have to be reworked to get the heat from the wood furnace to the existing ductwork. Or you can install a coil into the ductwork on the supply side of the furnace, for the water to run through from a hot water wood burner. This is probably the best way to heat if you have a hot air furnace. Installing the hot water coil is a very simple process and the piping is fairly easy to hookup.

Hot air wood furnaces are almost always a inside the structure appliance, which means that you have the mess of the wood and the ashes inside. This dust and dirt mess is something that is much better kept outside where it can be cleaned up much easier.

Bottom line here is that you want to use a hot water wood burning stove if you can. You will be much happier with the heat that you get from burning wood.

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how do i get even heat thru out the house with a daka wood stove


http://www.hearth.com/talk/categories/main-hearth-forums.4/
You burn wood, and smoke goes up flueway.
You're not running chimney smoke through ductwork so you have a heat exchanger.
What kind of heat exchanger?
probably air since you're running through ductwork?
How much hot air or hot water is coming off heat exchanger?
How big of a space can be heated with that amount of heat?
Is the exchanger located in optimal location?

Considerations.
One room log cabin with fireplace will not stay very warm.
One room house with big wood burning stove in center, with hot flue pipe running across the room and exiting on far wall, will get warm-hot, but will cool off fast.
Why?
Because the BTU output of firewood is much less than electric, coal, oil, or gas.
Otherwise they would have made wood-burning steam locomotives. But the locomotive boiler cannot get hot enough with wood ... the boiler needs coal to produce enough BTUs to boil water fast enough to rotate the turbine and turn the wheels.

Maybe your wood stove output should be measured.
Don't forget a huge percentage of fire heat goes straight up flueway.

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I purchased an aqua star 1600h-lp to be installed in a cottage. Question is, the cottage is heated with a large wood stove/fireplace. The water heater is located in a bathroom at the other end of the cottage. Am i in danger of getting a downdraft through the heater vent because of the wood stove draw thus freezing the heater. if so would i be better off with a horizontal vent kit than venting vertically. With such a large vent opening (5") won't that cool down the bathroom area quite a bit (kind of like having a window open)? would i have been better off with a heater with a smaller vent (3") or am i worrying about nothing? I am from Michigan so i does get cold.


I would say that the wood fire/stove must have a heck of a draw to affect the bathroom heater. Maybe a separate air supply from outside via a pipe,to the stove meshed off against vermin would decrease the problem. Plus it could stop cold air being sucked across the room from an outside door.
Downdraft through the heater could happen with either vertical or horizontal vent. More important is the direction of the prevailing wind [horizontal] ingress of water/snow etc [vertical]
We often use the separate air supply in the UK and if the pipe bore is large enough 4" plus it seems to work ok.

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