So after about two months of use, I am rather pleased with my outdoor forced air furnace project. A house with an open floor plan so that the stove can be run comfortably at temperatures hot enough for efficient operation. But when you consider the time it takes to earn the after-tax money to keep that thermostat fed with oil, propane or electricity, efficient and clean-burning wood heating starts to look much more inviting. That being said, I would probably lobby pretty hard to keep the wood mess outside!!
The Portage & Main Outdoor Water Furnace uses ½ to 1/3 less wood than other outdoor wood furnaces. When the guy who works at the little country hardware store where I buy my stuff heard I was installing an outdoor furnace, he wondered why. When AC utility power is restored, the Surefire Stove Sentry reinstates AC utility power as the prime energy source to operate the wood furnace or pellet stove. We have had a small wood burning stove on the first floor of our home in the past.
If they tell you that their truck bed measures 128 cubic feet, beware; if they stack the wood on the truck, it will be a cord. The biggest quality is that a soapstone stove heats up slowly, and releases the heat over several hours compared to a cast iron or steel stove (which heat up quickly and go cold quickly). The boiler has a large log chamber which holds enough wood for up to 12 hours burning. They also eliminate the risks associated with conventional wood burning furnaces.
Instead of letting smoke waft upwards through the chimney, the gases are directed downwards, through burning coals and into a secondary chamber. Normally you will locate the outdoor wood furnace at least 50 feet from your home or other buildings ( or as per local government/insurance recommendations). Too much water and it will take too long to heat up or your source will not keep up. Your furnace may end up staying on (fire burning at full) constantly. The joints between the panels are of a locking seal type and make for a solid gap free joint.
The return made out of flexible line appears pinched a bit in the video (going into the bottom part under the smoke stack), it’s not as bad as it appears, I actually went out to double check this evening. The boilers life expectancy will depend on many factors such as: wood / pellet type used and it’s humidity content, maintenance schedule, water / glycol used etc. We have recently purchased a home and I will be installing an outdoor wood furnace (which I will build) and have been researching the current market. Masonry Heaters are expensive compared to a nice EPA certified Phase 2 Parlor stove.
Burning wood releases the same amount of carbon as that the same wood would release if left to decay on the forest floor. There are two potential problems: in a very tight house, a wood stove might be starved for combustion air; and the heat output of a wood stove might be more than a superinsulated house requires. I’ve never heard him mention having to keep the wood dry- in fact, he’s always boasted how you can throw snow-covered logs in there no problem.
Cut a door in it and put a pipe on top and you could pretty much thow in whatever size wood you wanted to. I saw one like it at a where house onece. Trash burning exit DNR is especially harmful because it releases chemicals that are persistent in the environment, polluting our air, food, lakes and streams. If you really want a premium heating system, radiant flooring will also help your outdoor wood burning furnace go a long way. A wood burning system is the right choice for the increasing number of consumers who are concerned about our environment.
We opted for the woodstove because we live in a small town (at that time there were no restrictions on outdoor furnaces) (we own 6.5 acres within boro limits) and we were concerned about resale value. Also included in the Crown Royal Outdoor Burning Stove line is EPA Phase 2 Qualified wood burning gasification models. However, if the furnace does not have built-in rust prevention features and complete water circulation, the unit may rust away. Made popular in agricultural communities, outdoor wood furnaces have some specific installation guidelines to follow. If a stationary boiler was too large to cast, they used plate that was more iron than steel.
We were founded in 1973 and named after one of the coldest intersections in North America and have since expanded to include four models of wood burning units as well as wood pellet burners, wood chip, bio-fuels and coal stoker units. The Bryan Outdoor Wood Furnace is a self contained hot air system, that operates similarly to a window air conditioning unit. OWBs units burn wood or wood by-products to heat water that is pumped into a house through underground, insulated pipes to be used with an existing heating system. If you want your wood to dry quickly, don’t restrict air flow through your wood pile.
Since we have such a small space we are considering switching to an indoor stove to simplify and save even more. They certainly have a larger research and design budget than any of us normal human beings…. so learn from the masters, here’s a few articles on features of outside wood furnace based on models I have studied. The water from the outside wood furnace is never mixed with potable hot water, the heat is transferred from the outdoor furnace to indoor potable water through a plate heat exchanger or the more common side arm exchanger.
Outdoor boilers make wood cutting and splitting more efficient because the work can happen right next to the place the wood is burned. The furnace provides even heating in his home, which is kept at 82 degrees to comfort the ailing brother who is living with him. Weld and brace steel pipe together to make a chimney the size of the holes you cut into the boxes.
Still, I would advocate having the outside air duct, to nearly eliminate draw of inside air up the chimney at times when the stove is not in use, and particularly when the fire has burned out for the night. Using downdraft gasifier technology, this boiler burns the gasses produced during the normal burning process, therefore allowing minimal CO2 to be released into the atmosphere. A simple to make solar panel would do the heating, and they are digging up old gas tanks every time they move a gas station. If we can find a good place in our house, we’d like to put in a small wood stove.
Don’t those outdoor furnaces burn a rainforest worth of wood each year?” Well yes, they do. Or at least some models do. The difference between efficient and inefficient outdoor furnaces means burning either 15 cords of wood a year or 30, and as I discovered, something called a fire-tube boiler is key to frugal operation. Adding a couple of tons of stone around the stove (or, better yet, a barrel stove) makes a world of difference in heating efficiency in these situations.
The most critical of the three is #2. If the hot water pipe is not well insulated, you will waste a lot (and I mean a lot) of wood heating the ground. Our Portage & Main Outdoor Water Furnace users do not need to be concerned about dry grasses or hay stacks, etc. In an active fire, there will be some flame and little or no smoke in the firebox of the stove.
The DNR and Department of Health Services have limited ability to address outdoor wood boiler (OWB) related problems because residential OWBs are not regulated by the state. Actually, there’s more to the regulation of the combustion that takes place in Marcus’s furnace than even the above paragraph indicates. If your outdoor wood furnace does not have a 150 gallon capacity, heat loss will occur.
Combustion air flows of 40-50cfm not a small wood stove, that’s a MONSTER woodstove (or a small open hearth fireplace.) At the small end the max combustion air flow rates for a sub-30,000BTU/hr stove will be ~10cfm, and throttled back it’ll be 3-5cfm. Stay connected to the furnace that saves you money on your heating bills from almost anywhere in the world. A forced air draft furnace will burn almost any quality of wood – wet, green or dry.
Unless you’re prepared to build a newone to accommodate your stove, this can be a limitation as it’s unwise to have more than 7 feet of stovepipe connecting the stove to the chimney because of excessive creosote buildup and instability. Mild steel is a metal that works and if you have half a brain to take proper care and daily maintenance of your furnace it will last you. As energy prices rise, and the full environmental impact of fossil fuel use comes into clearer focus, more and more people are looking to wood as a sustainable, affordable source of heat. We’d like to upgrade to a wood boiler, also indoors, but too expensive right now.
I also have an endless supply of wood on my place I need to clean up. The beauty of the outdoor burner is it is not picky as to what it will burn, green wood, leaves, pine, if it fits in the door it will burn it as long as there’s a bed of coals. Perhaps it is built well enough that the plumbing will not drop below freezing, ever, and the stove is used for comfort rather than freeze prevention. If you choose not to buy a furnace with forced air draft, then try to minimize the ash removal chore by looking at furnaces with large doors, and easy access to the firebox.
You might need to remove a little of the blackened wood carefully while it is still hot and place it somewhere safely to cool.. but most people will find they wake up one morning to chunks of charcoal in the fireplace. Most outdoor furnaces work well when new, but a good warranty is the most important item you will need in the future. The House of Representatives passed Congressman Jason Smith’s amendment to eliminate new Obama EPA regulations on wood stoves by a bipartisan vote of 247-177. My dad built a pressurized carbon steel boiler 31 years ago, still works great.
So the best way, at least in my books, if you are really serious about learning how to buy smart or how to build an outdoor wood furnace is to study what is out there on the market. Reload your wood stove by adding at least three pieces of wood each time, on and behind the mound of hot coals. It burned four foot lengths of wood and he’d buy the scrap wood from shortwooders.