Posts Tagged ‘pellet boiler’

Simple Arithmetic for Residential Heating

Thursday, March 15th, 2012

By Dutch Dresser

On March 13, 2012, the Mass Energy Consumers Alliance website reported average Massachusetts heating oil prices to be $4.12/gallon. In Maine the government website on March 12, 2012, reported a statewide average price of $3.86. Assuming these to be the new baseline oil prices from which future increases will grow, it is interesting to look at some options for ordinary homeowners.

It is common for us to get calls from people whose homes are currently burning 1200 gallons per year. It is also common for many of those people to find it difficult to manage cash payment for the installation of a new renewable energy heating system in their homes. Even with the cost of commonly available financing, the savings associated with heating those homes using wood pellet central heating systems instead of oil-fired systems are significant.

At $3.86/gallon, a house burning 1200 gallons of oil would spend $4,632 a year on oil if there were no finance or carrying charges added onto the cost of fuel.

Loose bulk wood pellets delivered by Maine Energy Systems directly to the residential storage unit would provide the same heat from 10 tons of pellets for $2,390 with a price that is guaranteed through June 30, 2014.

A 20KW MESys/OkoFEN boiler system with a 3-ton storage system would serve this home well and would cost about $18,000 all installed. For many homeowners a cash expenditure of that size would be difficult. However, if the homeowner financed the system with a 20% down payment ($3,600) at a rate of 4.5% for a 15 year term, monthly payments would be $110.16, or $1,321.92 for the year.

That makes the total annual expenditure for heating fuel and payment for the brand new heating system $3,711.92, or $911.08 less than the same heat using #2 heating oil at today’s average oil prices in the old oil-fired system.

The pellet fuel price advantage is very apt to improve over time. The Mass Energy Consumers Alliance website provides the following heating oil prices for the March 15 over the past three years:

  • March 13, 2012: $4.12
  • March 1, 2011: $3.77
  • March 16, 2010: $2.86

Maine Energy Systems loose bulk pellet prices for the same period:

  • March 2012: $239/ton ($1.99/gal oil equivalent)
  • March 2011: $235/ton ($1.96/gal oil equivalent)
  • March 2010: $280/ton ($2.33/gal oil equivalent)

It should be noted that the current price of $239/ton ($1.99/gal oil equivalent) is guaranteed for new MESys boiler customers through June 30, 2014.

The trendlines are clearly different.

Dutch Dresser is the Managing Director of Maine Energy Systems in Bethel, Maine

Increasingly Intelligent Marketplace

Friday, January 20th, 2012

Dutch Dresser, Director, Maine Energy Systems

For many years, I held various positions at a local college preparatory school, Gould Academy. The school has always had a thoughtful innovative streak, which kept my interest for 26 years.

I have been particularly pleased as the new Buildings & Grounds Director has focused sharply on heating efficiency and has recognized the advantages of pellet heat. His most recent small “district” project shows a real understanding of the capability of today’s efficient pellet boilers.

One of the very first OkoFEN boilers to be installed in the US was a 56KW unit placed in a very large 3-story office building owned by the school. Because the unit was of greater capacity than the building demanded, it was reprogrammed as a smaller boiler.

Several weeks ago, the old Burnham boiler in the 2-story family house with attached 8-student dormitory next door began to leak. The B&G Director saw an opportunity and ran heat lines underground between the two buildings to take advantage of the remaining capacity in the OkoFEN boiler already installed.

The system was put in use just as the temperatures in town went to -10F overnight. The B&G Director reported the next morning that he had 174F water throughout the systems of both buildings and the boiler had not yet been reconfigured to its full 56KW capacity. A little creativity and an understanding of the capabilities and values of pellet heat reduced both the number of boilers he has to maintain and the amount of money he has to spend on fuel annually.

As the school prepares to replace its most oil hungry boiler with a new OkoFEN, its thoughts wander to small districts heating clusters of faculty homes and smaller structures.

Having seen large and small district heat projects in Europe, I am especially pleased to see a school so important to me leading the way, once again, in the deployment of useful, sensible technologies.

Three year heating fuel price freeze!

Thursday, February 24th, 2011

$100+/BARREL OIL? WOOD PELLET HEATING COMPANY GUARANTEES THREE-YEAR FUEL DELIVERY AT EQUIVALENT OF $1.99/GALLON

BETHEL, Me. (Feb. 24, 2011) – Global energy demand, instability in the Middle East and concerns over the strength of the U.S. dollar are combining to send oil prices in one direction: up. Some oil analysts believe home heating oil prices could reach $4.00 or more per gallon in the near future.

Fortunately, Maine and New Hampshire residents and business owners within a 150 road miles of Bethel, in Maine’s Western Mountains, or within 60 road miles of Ashland, Maine, have an alternative: wood pellet fuel, providing heat at a price that’s equivalent to $1.99 per gallon of fuel oil, guaranteed for three years.
That offer is made by Bethel-based Maine Energy Systems, which distributes pellet-fired boilers for homes and commercial spaces. Its new “Northeast Affordable Heat” program, using pellets from four Maine manufacturers (Corinth Wood Pellets, Geneva Wood Fuels, Maine Woods Pellets, and Northeast Pellets), is available to the first 1000 customers who install Maine Energy Systems boilers under the program.

Pellet heat will be a strong player in Maine’s future,” said Harry “Dutch” Dresser, Managing Director of Maine Energy Systems. “Pellet central heating is as easy and dependable as traditional heating systems, and it uses renewable resources that are plentiful right here in Maine.”

Northeast Affordable Heat guarantees that customers will pay no more than $239 per ton for bulk-delivered pellets through June 30, 2014. There are minimum bulk delivery quantity requirements, and the fuel price guarantee is offered only for use in new installations of Maine Energy Systems equipment. Some other restrictions, which can be found on the Maine Energy Systems website, apply.
“When most people think of pellet heat, they think of stoves and bags of pellets,” said Dresser. “Maine Energy Systems pellet boilers replace oil or gas-fired boilers and tie in with existing forced hot water systems, with significantly lower fuel costs. “

With pellet boiler systems, the fuel is delivered in bulk and feeds into the boiler automatically, just as with an oil-fired system. Maine Energy Systems currently has boiler systems installed in homes, schools, municipal buildings, and substantial commercial buildings.
In addition to reduced fuel costs for consumers, the engineering, fuel production and distribution networks – and the jobs they create – are all located in Maine.

Maine Energy Systems was founded in early 2008 by Les Otten, Dresser and William Strauss.

-maineenergysystems.com-

Domestic hot water from summer pellet burning

Monday, September 14th, 2009

In the interest of full disclosure the author is a Director of Maine Energy Systems.

I am often asked what I do about domestic hot water in the summer since my house is heated with a MESys pellet boiler system. The answer is, “I burn some pellets” just as I have burned some oil to create hot water for decades.

The follow-on question is always, “how many wood pellets does it take?” In a single case sample, my own, I have found an answer. Three adults live in my house full-time, one a college-aged son who loves long showers. We have frequent overnight company, including the families of four of our older son and our daughter. We use a washing machine and dishwasher as anyone does, and we’ve made no particular water reduction modifications to our house so our hot water consumption is probably typical for Americans like us.

My system contains an indirect hot water tank, which I keep adjusted to 180F during the heating months. During the non-heating months, I’ve reduced that setting to 120F, so the boiler fires at low level or in “keep alive” mode most of the time.

This summer, since the end of the heating season, I have averaged 20 pounds of pellets/day for the heating of water using my MESys 4000/Janfire system. At $270/ton that places my average daily hot water costs at $2.70, or the cost of a bit more than a gallon of #2 heating oil.

Ideally, I would have solar panels on my barn roof to further reduce combustion of any sort for the production of domestic hot water, but that will have to wait a bit.

Dutch Dresser

Janfire NH burner reconfiguration

Monday, June 22nd, 2009


In the interest of full disclosure, Dutch Dresser is a principal of Maine Energy Systems in Bethel, Maine. Maine Energy Systems distributes the Janfire NH burner discussed in this post.

As those who’ve read my posts will know, I’ve enjoyed my MESys 4000 system this past winter, and I have experienced no significant issues with the Janfire NH pellet burner that fires the Bosch cast iron boiler. Nonetheless, others have experienced different issues with their systems, so all burners in the field have been receiving a system reconfiguration this spring to eliminate known weaknesses. I had my burner done last week, one of the last to receive this reconfiguration.

Peter, the Bosch tech, removed the burner from my house, took it to our MESys facility, and performed the necessary reconfiguration. This included a full inspection, the replacement of two temperature sensors, one in the drop shaft and one in the burner bowl, and the installation of new processor software.

Once the burner work was complete, Peter gave my boiler a thorough cleaning, including the flue vent. While cleaning the boiler, Peter discovered that the refractory insulation in my pellet boiler door was cracked, so he replaced it. He also ensured that there was plenty of insulation above the burner aperture. This reduces heat to the drop shaft temperature sensor. It is that sensor that would detect any burn back issues, so keeping it cool prevents any false positive readings.

Any reluctance I’d felt earlier to having the burner modified, I soon lost. Peter did a great job. The burner continues to operate beautifully for me, and seems to spend even more of its time in either “keep alive” or “waiting” mode now that it just heating domestic hot water. I’m anticipating somewhat lengthened cleaning cycles this summer.

I continue to find the transition from oil to renewable, locally produced wood pellet fuel for heating my home a satisfying experience.

Dutch Dresser

It’s just different…

Friday, March 13th, 2009

In the interest of disclosure, I am a principal of Maine Energy Systems, distributors of the MESys wood pellet fired boilers.

I’ve now been through the heart of the Maine heating season with an undersized pellet boiler in my house, and I’m always prone to reflect upon changes like that.

In simple summary, when comparing heating with oil to heating with wood pellets, I’d say it’s just different.

I’m a pretty typical American. I got just a little bit interested in our home heating system four years ago when it was time for a new system. The beautiful Buderus oil boiler tickled me, and I was fully impressed by the substantial savings in oil consumption I enjoyed over use of the old Burnham that it replaced. That fascination consisted more of looking at fuel bills than of looking at the boiler…it required none of my attention and got none.

When the MESys 4000 went in my house last fall, I was fascinated with it for technical, economic, and environmental reasons. It was a mechanical thing that I could understand just by looking at it. As the winter went by, I learned about not just the little boiler, but also about our family’s heat using patterns and how they can be seen in circulating water temperature.

Because I was intrigued by the boiler, I checked it often, noted the modulation level it was running at and the water temperature it was maintaining relative to the target. I listened to it through its various modulation levels, through start up, and through the ashscrape cycle. I got so I could tell what it was doing by opening the cellar door and listening. For me that was fun.

I also learned about its needs relative to cleaning. I started out cleaning out the boiler pretty often, just to get an idea about how the different pellets were burning. When I decided to let it to until ash stopped it, I learned that with the pellets I had a ton of pellets burned would surely stop it. I fell into the habit of cleaning it out every other Sunday afternoon; it took a half hour, and I kind of enjoyed it.

Over the course of the winter, I took great pleasure in looking at my small, newly lined, chimney and noticing only hot air coming from it while nothing came from the large front chimney where the oil boiler vented.

As I’ve noted in earlier posts, my boiler is decidedly undersized for my house at 51,000 BTU/hour for a house with a calculated heat loss of 106,000 BTU/hour. My small boiler heated my house and my domestic hot water to comfortable levels all winter except the days when the temperature dropped below -5F. During those days, the oil boiler would “help out” when boiler water temp dropped below 140F, a completely arbitrary set point I chose. Today, I decided that I wouldn’t be burning anymore oil this year, so I asked my oil dealer to top up the tank while prices are low; I’m afraid they were upset to put only 41 gallons in my tank. With those 41 gallons, I received 7.4 tons of pellets and have approximately 2 tons in my pellet storage bin. That puts my fuel consumption at the BTU equivalent of about 690 gallons of oil, for the October to mid-April heating season. That is lower than usual despite a cold winter. I’ll have to wait until I can compile a calendar year’s worth of data, but it appears at this time that the manufacturer’s assertion that a boiler which is working at capacity most of the time is much more efficient has proven to be the case in my situation.

Now when I talk to people about central pellet heat, I always make it a point to say, “it’s just different” than heating with oil. You will have to understand your heating system a bit; you will have to clean the boiler from time to time (for me every two weeks); and, you’ll become much more aware of how your using your burning fuel.

I like it, but it’s just different in a pleasant sort of way.

Baffled

Tuesday, March 10th, 2009

I enjoy learning about my new pellet boiler, so I check on it often. At work, I can hear a MESys 6000 all day as it heats a substantial part of our office/warehouse building. Because of that exposure, I’ve come to know by sound when things are different than they should be.

A couple of weeks ago, my boiler didn’t sound right, but I ignored it. A day later, it failed with a “flameguard overheat error.” When I opened it, I found that I hadn’t put the baffles in properly when I cleaned the boiler and the baffles had fallen over the burner. I took out the ash, replaced the baffles and was back in business shortly.

This morning, I heard the oil boiler come on, which shouldn’t happen, even with my purposefully undersized boiler, until outdoor temperatures are well sub-zero, and this morning’s temperature was approximately 10F. I went to look at the boiler and it was “working,” but it didn’t sound right. I looked through the inspection port and, sure enough, a baffle was standing edgewise next to the pellet burner. Again, I hadn’t done well replacing the baffles after cleaning.

I opened the boiler, took out a few shovels full of ash and carefully put the baffles back in place. I find the balance of the baffles a delicate one, particularly as the baffles become a bit heavier due to combustion product deposit build up.

During the next cleaning I’ll remove some of that build-up on the baffles to see if it makes it easier for me to get them properly installed. I’ll also attend to the shortening of the baffles that has been recommended for the four-section boiler; both of those steps should help make the possibility of misaligning the baffles after cleaning less likely.

Dutch Dresser

Appliance venting regulation

Wednesday, February 25th, 2009

Testimony offered in writing in support of a bill that would require rules relating to the venting of multiple devices into the same chimney to be heard at the legislative committee level rather than allowing the Oil and Solid Fuel Board to establish rules without committee intervention.

An Act To Permit the Use of a Common Flue for Oil and Solid Fuel Burning Equipment, LD 53

Public hearing conducted by the Joint Standing Committee on Criminal Justice and Public Safety Committee, February 25, 2009

Senator Gerzofsky, Representative Haskell, and Esteemed Members of the Criminal Justice and Public Safety Committee,

I am Harry “Dutch” Dresser from Bethel, Maine. I come to you today as a Founding Director of Maine Energy Systems and as one who has been involved in introducing technological change to populations throughout his adult life. I would encourage you to support LD 53 both for the immediate effect a change can have on peoples’ abilities to heat their homes in compliance with the law and for the advantage its passage could lend to a fundamentally important transition we’ve embarked upon as a State.

I, and many like me, have lived many of our younger years in homes with wood-burning stoves in the same chimney as a large oil boilers; the houses still stand and so do we. However, I am not here to talk about that, I’m here to talk about the regulatory process in times of significant change. That’s what this bill is about.

80% of the nation’s #2 heating oil is burned in the Northeastern United States. Maine is the largest consumer per capita of heating oil in the nation. 80% of our homes are heated by burning #2 oil. In 2008, we consumed nearly $1.6 billion worth of oil just to keep our homes warm. 75% of that money left the U.S. economy nearly immediately. The uncontrollable spike in oil prices that caused that very difficult winter reminded people in Maine and across the country about the great value of oil. Oil is a remarkable resource; it is the base material in many of our manufactured goods, and is recyclable for repeated use in those applications. We were reminded last winter that oil is also in finite supply and that it is unconscionably wasteful to burn it for heating when sustainably renewable alternatives exist. Despite the low oil prices today, occasioned by a deeply troubled economy, Mainers are turning in ever-greater numbers to alternative means of heating their homes, which will ultimately lead us to greater energy independence in the State. When that heating transition involves wood and wood pellets manufactured in Maine, as 400,000 tons currently are, the net positive effect on Maine’s economy and its tax base is truly remarkable at the same time that greenhouse gas emission is profoundly reduced.

When transitions as significant as the one we are just beginning to experience occur in a population, flexible, entrepreneurial, business leaders take care of the necessary technological change. Hardware issues resolve themselves quite quickly and products to support the transition begin to proliferate. We are seeing those things occur in the heating fuel transition already. Geothermal technologies are now commonly available, wood pellet stoves are well-established in our region, pellet-fired central home heating systems are becoming more common, and thermal solar installations are taking their places on many roofs. As the public begins to understand the opportunities available to them, early adopters of new technologies have a variety of experiences as new products are refined, and gradually the early majority takes up the new equipment. The way of seeing the base problem is forever changed.

In Maine, we are currently in the stage of residential heating transition where early adopters are finding ways to heat their homes more inexpensively, more environmentally, and safely using energy sources that are locally available and are sustainably renewable. This transition will spread naturally as more and more people understand the advantages of alternatives available to them and as more and more refined products to support that transition reach the market and find accessible price points.

Generally, product innovation and public education about product difference and advantage are filled with both stress and exhilaration, but they can be accomplished with focused hard work and persistence.

The most difficult aspect confronting widespread technological change and adoption is quite frequently that of bringing existing regulation in line with actual characteristics of the new technologies. The regulation has often been established expressly for the existing mature technologies. Often some of that regulation has as its main purpose the preservation of the mature of the mature technology usually accomplished by making it difficult for competing technologies to occupy the same space.

(Legislation and regulation were ultimately turned on their heads as emerging digital communications technologies supplanted analog technologies and vied for bandwidth on existing infrastructure.)

With this bill, and surely more that will follow it, we are seeing a new emerging view of residential heating trying to make legitimate space for itself in regulation after it has already made that space in the real world.

New ways of viewing well-established practices are very difficult for many people. They are often most difficult for those most expert in existing practices who have been well trained to see all issues related to the practice through the lens of a very particular model. As we have already seen, and will see more frequently in our lifetimes, change is not always gradual, and it is not always simply modification of existing practice. Sometimes, it is just different.

At its roots, the issue being addressed by LD 53 is about beginning to make way for fundamentally changing the way we look at residential, and probably commercial, heating in the State of Maine. I support this bill because it is a political attempt to get decision-making on this critical issue into the larger legislative forum where members will generally have only casual understanding of the existing model allowing them room for open-minded exploration of the issues before them.

Maine will face many paradigm changing issues in the next decade; it will be wise for the State to learn to look as broadly at those changes as is possible. This bill is an attempt for such thing on a paradigm shift that is underway.

Thank you for the opportunity to address you.

Respectfully submitted,

Harry H. Dresser, Jr., Ed.D.

There is a limit…

Friday, January 16th, 2009

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Last night the weatherman on television was delighted to be able to report that we would see low temperatures like we haven’t seen for years.  In some ways, this was good news to me; I’d get to see how the little pellet boiler would do in our big, old house in very cold weather.  Not wanting to risk any frozen pipes, I adjusted the AquaStat on the oil boiler to kick in if the water in the system dropped below 150F.

Today's temp

Today's temp

At 6:00 a.m. today, my thermometer said -30F.  The house was at the temperatures we customarily keep, and the kitchen was cool, as it generally is during hard cold snaps.  There is insufficient fin tube in the kitchen to heat it effectively in very cold weather and it faces northwest.

I heard the oil burner kick on and run for about five minutes indicating that water temperatures in the system had dropped below 150F.  When I go up, I checked the systems, and the MESys 4000 had a boiler temperature of 172F despite the fact that all five zones in the house were calling.

Showers, morning dishwashing, and keeping up with the house dropped the water temperature below 150F once more giving the oil burner another four or five minutes of catch up.  For the balance of the day, no oil burner time was required, and the house stayed at its usual temperatures.

I gained confidence that the little boiler would have kept the house from freezing on those conditions, but layered clothing would also have been a good idea.

Dutch Dresser

A pellet’s a pellet, right? Well, sort of!

Friday, January 9th, 2009

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In the interest of disclosure, I am a Director of Maine Energy Systems.

Wood pellets

Wood pellets

Burning wood pellets for home heating is a wonderful way to reduce one’s carbon footprint.  Wood pellet fuel is considered by scientists to be a carbon neutral fuel because the carbon released during combustion is in the active carbon cycle.  Trees gather carbon from the atmosphere and release it when they decompose or are burned.  In fairness, the fossil fuel used in the production and transportation of wood pellets makes them closer to 70% carbon neutral when their full life cycle is considered.

Burning pellets requires that appropriate quality pellets be used for the burning appliance.  Sophisticated pellet boilers should burn premium quality pellets, while mills can use much “dirtier” industrial pellets. There are many measurable attributes of pellets, and they have all been carefully measured by the Europeans for years as they’ve burned pellets in increasingly sophisticated appliances.

As we deliver pellets in our bulk delivery trucks to pellet storage bins and burn them in our Bosch/MESys systems with their Janfire NH pellet burners, we learn more and more about how important the various attributes of pellets are.  Let’s talk about a few simple ones.

Moisture content: Under the standards proposed by the Pellet Fuels Institute, a voluntary manufacturers’ organization, moisture content for premium pellets must be equal to, or less than, 8%.  The Swedish burner manufacturers with whom I’ve talked think that we’re a bit wasteful drying the fuel that much.  Most European standards call for 10-12% moisture in premium pellets.

Pellet Heating value: Measured in BTUs/pound this value is presented various ways:  as received, moisture free, and moisture & ash free. As received values will commonly range between 7,500 BTU/lb and 9,000 BTU/lb. Generally, the higher the proportion of softwood in the pellets, the higher the heat value, an idea that’s counter-intuitive to cordwood burners.

Ash content: PFI proposed standards call for premium pellets to have 1%, or less, inorganic ash content.  This falls in the middle of European standards, which range from 0.5% to 1.5% ash content for premium grade pellets.  In practice, the home pellet burner will notice this attribute most.  The higher the ash content, the more frequently stoves or boilers will have to be cleaned.  MESys distributed pellets are under 1% ash, so boiler owners can expect to remove about 20 pounds of ash for every ton of pellets burned.  A MESys 6000 can easily hold 40 to 60 pounds of clean ash.

Pellet durability: As pellets are handled some break.  Since delivering and automatically feeding pellets to boilers systems requires machine handling of the pellets, it’s very important that pellets be durable.  Regional manufacturers are beginning to understand the importance of high durability pellets and are modifying their processes to make harder pellets.  European standards, and proposed PFI standards, call for pellets of 97% to 98% durability when shaken in a standard test unit.

All of these things are of interest to me as I work to make central heating with wood pellets convenient for American homeowners; they needn’t be of much concern to homeowners as long as they purchase their pellets from a trusted, reliable source offering truly premium grade pellets.  Janfire burners will be carefully configured at installation for the pellets being burned using net heat value and pellet density information to produce the most efficient combustion possible.

Dutch Dresser