Recently, the Environmental Protection Agency released proposals for new, federal restrictions on wood stoves The rules would only affect residential heaters manufactured after 2015. Steel stoves don’t need this maintenance, but can have a problem with high stress panels burning. If only wet wood is burned, the total wood volume used for an entire winter may be as much as 30% more than if seasoned wood were used. The average efficiency of US made pellet stoves is probably about 70% HHV, based on several third party studies, but many popular pellet stoves are between 55 – 65% efficient. Emissions: As heat inside the stove intensifies, waste gases (smoke) are released from the wood. Periodically clean out the deposits formed on the chimney walls to ensure good performance of the stove and reduce any safety hazards created by the creosote deposits.
There is a certain amount of chimney needed to get the proper draft for you stove… We plan to make our chimney as high as needed to allow our stove to function properly then have it, removable” for when we are on the road. The stove has a ducted outside air source connected directly to the back of the stove. We don’t go through anywhere near 30 face cords of wood and we live in an old draft farmhouse in Michigan.
Drying rates are a function of the wood temperature, and the relative humidity & air velocity of the proximate air. Combines two combustion systems – secondary burning and a catalytic combustor – to burn everything in the woodsmoke before it exits the stove. A solid block of wood burns slower than the same block of wood split into many pieces. Some modern, centralized wood heaters use wood gasification technology that burns both the wood fuel and the associated combustible gases, rendering them up to 80% efficient.
Both types of wood stoves have advantages and disadvantages: While catalytic models generally have longer burn times and higher efficiency than non-catalytic wood stoves, catalytic models can be higher maintenance, since the catalysts need to be replaced every few years (depending on how often the stove is used, type of wood burned, etc.). And models that rely on electricity to operate will, of course, be non-functional in the event of a power outage.
This problem occurs in even marginally tight homes whenever the exhaust rising up the chimney from a wood fire combines with other evacuating factors to vacuum so much air out of the house that the resulting negative pressurization eventually overcomes the natural tendency for the hot exhaust to rise up the chimney, pulling wood smoke back down into the room.
I have an idea how much wood it takes to make their claimed BTU output of 42,200 and the numbers don’t add up. The average BTU of wood is about 7-8000 BTUs per pound, does not matter if it is hard wood or softwood, it is pretty much the same, except a log of oak is heavier than a log of pine, therefore it contains more BTUs per sq inch of space inside the firebox.
Controlled combustion heaters such as wood stoves and inserts don’t consume nearly as much room air as open fireplaces, but even their small amount of air exfiltration can combine with that of other air evacuators such as radon pumps, kitchen and bathroom exhaust fans, attic ventilation fans, clothes dryers and other vented appliances to produce the same undesirable level of household depressurization.
This features four huge innovations: a wood frame aesthetic (a bit rough, but the trail is now blazed for better wood workers); portable (can be taken apart and put on truck in less than an hour; can be taken off of a truck and built in a little over an hour); a heat riser that goes all the way to the ground instead of sitting on bricks; the thermal mass is a collection of pea gravel and river rock (that allows air to pass through) instead of cob.
CSIA’s Eldridge says, Generally speaking, an open fireplace is not an efficient space heater, due to the fact that the chimney draws not only the hot combustion gases up and out of the home, but conditioned air from the home as well.” Much make-up air is frigid air drawn in through cracks and gaps in the home, making the house feel cold and drafty.
As a document from the Cornell University Cooperative Extension points out, firewood is one of the least convenient sources of heat, … requiring time and considerable effort to fell and split trees, move wood into dry outdoor storage for at least a year, transport wood indoors, maintain an effective woodstove fire, and keep the system cleaned for safety and efficiency.” I’ll add another disadvantage: if you heat with wood, you’ll be tethered to your house all winter.
While we are fortunate to have ample wood at our disposal, it would still require hauling the wood to the burner and cutting it. I am certainly not afraid of work, but the thought of the consistency required in maintaining a supply of wood, as well as keeping the fire going in order to heat our home—while not a deal-breaker—did cause us to wonder how quickly that romance would wain.
Chopping the wood down to size before storing it will also help it to dry quicker. The USFS recommends splitting and stacking your wood in neat rows for optimal drying. Both wood and wood pellet stoves burn wood, which is carbon neutral, making either choice better for the environment than natural gas or petroleum-burning heaters. Stated efficiency is 89% and there is the option of using wood or an electric mode for those times you run out of wood. With a modern wood stove insert the burn time can last anywhere from 8 to 10 hours.
Tie or crunch the bags shut, pack them in cardboard boxes, and store the boxes near, or in, your wood box. It provides 10 percent (up to $500) for the purchase of a qualified biomass-burning stove between January 1, 2011 and December 31, 2011 for any wood- or pellet-burning stove that meets the 75 percent efficiency rating qualifies. The safe operation of a wood-burning stove requires regular maintenance such as emptying ash pans (containers) beneath the wood grate.
The usual harvest method is to down the tree, remove all the limbs, and cut the trunk into lengths that fit in the stove. One of the biggest is an oddly shaped firebox with a too-small door; if you want to get the promised 21-inch-long pieces of wood in there, they must be split quite small. Multi-fuel stoves usually have a riddling grate for the effective combustion of solid mineral fuels but also have Airwash so they can effectively burn wood as well.