Wood boiler heating systems intelligently engineered by TARM USA

Fuel Type

Low

Price Range

Medium

Price Range

High

Price Range

Cord Wood@80%

Efficiency in a Tarm Boiler

20 million/Btu cord@ 20% moisture mixed

Northern Hardwoods
16 million Btu/Cord Net Output

7.81/mil Btus

$125.00 / cord

$9.38/mil Btus

$150.00 / cord

$12.50/mil Btus

$186 / cord

Wood Pellets@87.5%
Efficiency in a Tarm Boiler
8200Btu/lb@6%Moisture Content
7,175 Btu/lb Net Output

$12.54/mil Btus

$180.00 / ton

$15.33/mil Btus

$220.00 / ton

$18.82/mil Btus

$270.00 / ton

Corn@87.5%
Efficiency in a Tarm Boiler
6800 Btu/lb@15.5% Moisture Content
5,950 Btu/lb Net Output

$7.50/mil Btus

$2.50 / bushel

$11.25/mil Btus

$3.75 / bushel

$15.00/mil Btus

$5.00 / bushel

NO2 Fuel Oil@85%
Efficiency 138,000Btu/Gallon
117,300 Btu/Gal Net Output

$19.18/mil Btus

$2.25 / Gal

$21.31/mil Btus

$2.50 / Gal

$25.58/mil Btus

$3.00 / Gal

Natural Gas@85%
Efficiency 100,000Btu/ Therm
85,000 Btu/Therm Net Output

$14.12/mil Btus

$1.20 / Therm

$16.47/mil Btus

$1.40 / Therm

$21.16/mil Btus

$1.80 / Therm

Propane@85%
Efficiency 90,000Btu / Gal
76,500 Btu/Gal Net Output

$29.41/mil Btus

$2.25 / Gal

$32.68/mil Btus

$2.50 / Gal

$39.22/mil Btus

$3.00 / Gal

Electricity@100%
Efficiency 3412Btu / KWH

$14.65/mil Btus

$.05 / KWH

$29.30/mil Btus

$.10 / KWH

$43.96/mil Btus

$.15 / KWH

	Small House or Very Good Insulation In a Cold Climate 50 million Btus used per Heating Season*			Medium House or Good Insulation In a Cold Climate 100 million Btus used per Heating Season*			Large House or Poor Insulation In a Cold Climate 150 million Btus used per Heating Season
Fuel Type	High $ Range†	Mid $ Range†	Low $ Range†	High $ Range†	Mid $ Range†	Low $ Range†	High $ Range†	Mid $ Range†	Low $ Range†
Cord Wood	$562.50	$468.50	$375.00	$1125.00	$937.00	$750.00	$1687.00	$1312.00	$937.50
Wood Pellets	$789.00	$645.50	$574.00	$1578.00	$1291.00	$1148.00	$2367.00	$1936.50	$1722.00
Corn	$771.00	$578.50	$385.50	$1542.00	$1157.00	$771.00	$2313.00	$1735.50	$1156.50
Oil (#2 Fuel Oil)	$815.00	$556.50	$385.00	$1631.00	$1133.00	$770.00	$2446.50	$1699.50	$1155.00
Propane	$1250.00	$868.00	$625.00	$2500.00	$1736.00	$1250.00	$3750.00	$2083.50	$1875.00
Natural Gas	$875.00	$625.00	$375.00	$1750.00	$1250.00	$750.00	$3375.00	$2250.00	$1125.00
Electricity	$2198.00	$1465.00	$732.50	$4396.00	$2930.00	$1465.00	$6594.00	$4395.00	$2197.50

*The energy consumption levels for the three homes described are based on a 1997 US Department of Energy Survey Entitled “A Look at Residential Energy Consumption in 1997”. The survey compiled energy use data for five regions of the United States based on heating degree days.

Total Btu consumption per household where end use is space heating was as follows:

Heating Degree Days	>7000	5500-7000	4000-5499	<4000	>2000 +
Energy Consumption Million Btus / Heating Season	79.4	78	58.3	27.9	21.9

Most Tarm Boilers are sold through the Cold Climate Range (5500 HDD – 7000 HDD) or Severe Cold Climate Range (>7000 HDD). The Cold Climate Range runs roughly between the 35^th and 45^th parallel. The Severe Cold Climate Range consists of areas roughly north of the 45^th parallel. In the United States only the Northern Tier states and Northern New England are in the Severe Cold Climate Region. There can be large variations in heating demand in either of these two regions. It may be possible to find the actual heating degree days for your area by consulting your local utility.

Data Compiled by Scott W. Nichols for Tarm USA, Inc.

Fuel Costs Comparison

Small House or Very Good Insulation

Fuel Type

Cord Wood

Wood Pellets

Corn

Oil (#2 Fuel Oil)

Propane

Natural Gas

Electricity