Woodstoves: Stay Warm While
Cutting Pollution
by Andrea Lani
With heating oil prices creeping ever higher, more and more New Englanders
are dusting off the old wood stove and hatchet, in hopes of a little cheap heat
this winter. Before striking that first match, however, we would do well to
look at the environmental costs and benefits of wood burning.
Unlike coal, oil, natural gas and propane, sustainably harvested wood is
considered a renewable resource; as long as we replenish what we cut and
maintain forest health, we will always have wood to burn.
Wood also adds no net carbon dioxide (CO2), a greenhouse gas implicated in
global climate change, to the atmosphere; wood spent its life as a tree
absorbing CO2, so the CO2 emitted when it burns is still part of the carbon
cycle.
Despite these environmental benefits, however, burning wood can cause real
pollution problems both indoors and out. Wood smoke contains high levels
of fine particulates (soot), mercury, dioxin and other toxic air pollutants.
Luckily, there are steps we can all take to make sure our stoves burn more
efficiently, reducing pollution and cost.
Weatherize Your Home, Select the Right Wood Stove
The first thing to do, no matter what kind of fuel heats your home, is to
weatherize with insulation, weather stripping, caulk and storm windows.
Weatherization keeps your heat inside instead of helping to warm up the
neighborhood. A tight house also helps reduce the amount of fuel you burn.
Selecting the right wood stove is the next step. Newer wood stoves meet strict
federal (EPA) emissions standards through the use of a catalytic combustor or
recirculation of gasses and particulates. Look for a sticker on the stove that
indicates it's EPA-certified and for information on heat output and efficiency.
A more efficient stove will pollute less and save money on fuel in the long
run.
Picking a wood stove sized correctly for the area it will heat will increase
efficiency and reduce emissions. A wood stove that is too large will have to
be damped down, creating more pollution from inefficient combustion and
increasing dangerous creosote build-up.
Proper Maintenance is Importance for Wood Stoves
Proper operation and maintenance will keep your stove running clean and
safe. For a clean, efficient burn, build a small, hot fire with hardwood that has
been air-dried for at least six months.
Small fires burn volatile gases more quickly, reducing safety hazards and air
quality problems. The optimum temperature range for gases leaving the
stove should range from about 300° to 400 F. A simple, inexpensive stack
thermometer that sticks to the stovepipe with a magnet will help to monitor
the exit gas temperature.
Keeping the stove clear of excess ash prevents clogging of the stove's intake
vents that supply needed oxygen. Once or twice per year clean the stovepipe
and inspect the stove and chimney for warping, gaps in the baffle and
creosote build-up. Replace catalytic combustors every two to three years.
Go ahead and snuggle up in that warm, cozy heat from the wood stove. And
rest assured that with the right stove, seasoned wood and good operation and
maintenance practices your wood heat isn't giving someone else a bad air day.
About the author:
Andrea Lani is an Environmental Specialist in the Bureau of Air Quality with
the Maine Department of Environmental Protection.
Cutting Pollution
by Andrea Lani
With heating oil prices creeping ever higher, more and more New Englanders
are dusting off the old wood stove and hatchet, in hopes of a little cheap heat
this winter. Before striking that first match, however, we would do well to
look at the environmental costs and benefits of wood burning.
Unlike coal, oil, natural gas and propane, sustainably harvested wood is
considered a renewable resource; as long as we replenish what we cut and
maintain forest health, we will always have wood to burn.
Wood also adds no net carbon dioxide (CO2), a greenhouse gas implicated in
global climate change, to the atmosphere; wood spent its life as a tree
absorbing CO2, so the CO2 emitted when it burns is still part of the carbon
cycle.
Despite these environmental benefits, however, burning wood can cause real
pollution problems both indoors and out. Wood smoke contains high levels
of fine particulates (soot), mercury, dioxin and other toxic air pollutants.
Luckily, there are steps we can all take to make sure our stoves burn more
efficiently, reducing pollution and cost.
Weatherize Your Home, Select the Right Wood Stove
The first thing to do, no matter what kind of fuel heats your home, is to
weatherize with insulation, weather stripping, caulk and storm windows.
Weatherization keeps your heat inside instead of helping to warm up the
neighborhood. A tight house also helps reduce the amount of fuel you burn.
Selecting the right wood stove is the next step. Newer wood stoves meet strict
federal (EPA) emissions standards through the use of a catalytic combustor or
recirculation of gasses and particulates. Look for a sticker on the stove that
indicates it's EPA-certified and for information on heat output and efficiency.
A more efficient stove will pollute less and save money on fuel in the long
run.
Picking a wood stove sized correctly for the area it will heat will increase
efficiency and reduce emissions. A wood stove that is too large will have to
be damped down, creating more pollution from inefficient combustion and
increasing dangerous creosote build-up.
Proper Maintenance is Importance for Wood Stoves
Proper operation and maintenance will keep your stove running clean and
safe. For a clean, efficient burn, build a small, hot fire with hardwood that has
been air-dried for at least six months.
Small fires burn volatile gases more quickly, reducing safety hazards and air
quality problems. The optimum temperature range for gases leaving the
stove should range from about 300° to 400 F. A simple, inexpensive stack
thermometer that sticks to the stovepipe with a magnet will help to monitor
the exit gas temperature.
Keeping the stove clear of excess ash prevents clogging of the stove's intake
vents that supply needed oxygen. Once or twice per year clean the stovepipe
and inspect the stove and chimney for warping, gaps in the baffle and
creosote build-up. Replace catalytic combustors every two to three years.
Go ahead and snuggle up in that warm, cozy heat from the wood stove. And
rest assured that with the right stove, seasoned wood and good operation and
maintenance practices your wood heat isn't giving someone else a bad air day.
About the author:
Andrea Lani is an Environmental Specialist in the Bureau of Air Quality with
the Maine Department of Environmental Protection.
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