Details about TARM OT 35 Wood / Coal Boiler/Furnace with Oil back upTARM OT 35 Wood / Coal Boiler/Furnace with Oil back up See original listing
Dec 25, 2011 11:54:22 PST
Hinsdale, NH, United States
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully ... Read moreabout the condition
|HVAC Product Type:||
Wood, Coal, Oil
HS Tarm model OT35 wood / coal boiler with oil back up.
The HS Tarm Type OT is an energy conserving steel plate boiler for residential hydronic heating and domestic hot water supply. The Type OT boiler was manufactured in Denmark, a country known throughout the world for its excellent heating products. Designed primarily for efficiency and flexibility, the Type OT provides heat and hot water year round from a variety of fuels. Wood and coal can be used in combination with oil, or gas. On the left side of the Type OT is the combustion chamber for oil or gas, and on the right, a large firebox for wood or coal. An automatic draft regulator controls the wood fire. Should the wood fire die down or be allowed to go out, the control system automatically switches on the back-up unit oil, or gas to maintain boiler temperature. In addition, this Type OT is supplied with shaker grates for burning coal or coke.
The large firebox employs a base burning arrangement to maximize efficiency. As wood is heated in any fire, it emits gases, which, when burned, yield heat. When they are not burned they can represent a significant loss of efficiency. In a boiler they can also cause tar-like deposits commonly called creosote. These deposits are formed by the condensation of some flue gases when they are cooled. The Type OT's base burning principle encourages burning of these gases. Much of the smoke leaves the firebox at its base, where flammable gases are drawn over the fire's hot coals. Additional air for this combustion is provided by the secondary air inlet in the upper door of the firebox. Due to the fact that the wood firebox is surrounded by water, the firebox walls are maintained at a relatively cool 200° F temperature. A flap damper controls the relative amount of smoke leaving the top and bottom of the firebox. The damper is operated through the cleaning door in the center of the boiler. When the damper is in the vertical position, much of the smoke will be drawn out at the base. Poor chimney draft conditions and some fuels require an intermediate damper position, which causes a greater proportion of smoke to leave from the top of the firebox, An oil or gas burner works well with the damper in the vertical or an intermediate position. When an oil or gas burner is used exclusively, as in the summer, the damper should be in the horizontal position. This will slightly increase efficiency by causing the flue gases to travel a longer path through the solid fuel fire box before leaving the boiler. The oil gas combustion chamber is similar to that of other modern boilers. It is surrounded by water on all sides, including the bottom. This "wet base" design allows for greater heat transfer to the water. Equipped with a flame retention oil burner, this boiler will operate at an efficiency of up to 84%.
HS Tarm Type OT boilers are manufactured for use with standard American central hot water healing systems. All threaded tappings accept standard American controls and equipment.
This unit is designed for a hot water heating system. It can be used in a forced hot air system by installing a hot water heat exchanger coil in the heating ducts.
The BTU output is 112,000 burning wood or coal, & 140,000 burning oil.
This boiler can also be used as a pool heater when used with a heat exchanger available from other sellers on ebay.
This boiler was designed to be installed indoors, but can be put in a small shed for outdoor use if desired.
Fire box is 21.5" long, 10.5" wide & 30" high.
Outside dimensions are 52" tall, 30" deep & 39.5" wide.
Weight is approximately 1100 lbs.
Water capacity is 76 gallons.
Firebox capacity is 4.1 cubic ft.
Coal capacity is 165 lbs
Flue size is 6"
This boiler was manufactured in 1979
This boiler does not have a domestic coil for heating tap water, but a coil can be installed for an additional $500
This boiler is equipped with cast iron shaker grates for burning coal or wood.
Tarm boilers are still being supported by Tarm Biomass in Lyme NH
Replacement parts & service are readily available.
This boiler is in excellent condition & has been cleaned inspected & pressure tested.
I can load it in your truck or trailer for you, or ship it to you by truck.
Use the shipping calculator to determine shipping cost, found on the shipping & payments tab.
Please add $50 to cover cost of prepping the boiler for shipping.
Cash payment upon pickup is preferred. PayPal is accepted.
I may end this listing early as this item is for sale locally off ebay if you want it bid early.