R.S. Means Technology Cost Breakdown: Heating Boilers

Editor's Note: The following cost breakdown on heating boilers, provided by the R.S. Means division of Reed Construction Data, is intended as a quick reference for the most commonly specified system equipment types. For more info, visit: www.rsmeans.com Cast iron section boilers may be assembled in place or shipped to the site as a completely assembled combustion package.

02/01/2003


Cast iron section boilers may be assembled in place or shipped to the site as a completely assembled combustion package. These units can be made larger on site by adding intermediate sections.

Steel boilers are usually shipped to the site completely assembled. Large steel boilers may be shipped in segments for field assembly and testing.

Heating boilers are rated by their hourly output, expressed in British thermal units (BTU). The equipment considered in the cost breakdown above is a representative mid-range sample, rated in "thousand BTUs per hr." (MBh).

The output available at the boiler supply nozzle is referred to as the gross output. The gross output in BTU per hr. divided by 33,475 yields the boiler's horsepower rating. The net rating of a boiler is the gross output less allowances for the piping tax and the pickup load. The net load should match the building heating load.

Due to the high cost of fuel, efficiency of operation is a prime consideration when selecting boiler units. Because of this, recent innovations in manufacturing have led to more compact and efficient boilers.

The U.S. Dept. of Energy provides test procedures to compare annual fuel utilization efficiency (AFUE). Manufacturers today are claiming close to 90% efficiency, a result of better insulation, heat extractors, intermittent ignitions, induced draft and automatic draft dampers.

R.S. Means Technology Cost Breakdown: Heating Boilers

Rating (MBh)

Daily Crew Output

Labor Hours

Unit

Matl.

Labor

Equp.

Total

Electric, ASME , standard controls and trim

Steam

7,984

0.16

200

Ea.

48,900

7,150

56,050

Hot Water

8,191

0.25

128

42,000

4,575

46,575

Gas-fired , natural or propane, standard controls

Cast iron with insulated jacket

Steam, gross output

6,970

0.10

320

58,000

11,500

69,500

Hot water, gross output

6,970

0.09

359

59,000

12,900

71,900

Steel insulating jacket

Steam, not including burner, gross output

7,200

0.18

177

43,300

6,375

49,675

Hot water, burner and one control valves

3,000

0.15

160

32,500

5,625

38,125

Gas/Oil , combination with burners and controls

Cast iron with insulated jacket

Steam, gross output

6,970

0.09

372

62,000

13,300

75,300

Hot water, gross output

7,130

0.08

385

51,500

13,800

65,300

Steel, insulated jacket, skid base, tubeless

Steam, 15 psi, gross output

8,870

0.09

336

55,500

12,100

67,600

Steam, 150 psi, gross output

2,511

0.17

141

27,800

4,950

32,750

Hot water, gross output

3,150

0.16

146

40,500

5,125

45,625

Oil-fired , standard controls, flame-retention burner

Cast iron, with insulated flush jacket

Steam, gross output

6,970

0.09

363

59,000

13,000

72,000

Hot water (same price as steam; for tankless coil in smaller sizes, add 15%

Steel, insulated jacket, burner

Steam, full water leg const, gross output

2,400

0.19

125

19,200

4,400

23,600

Hot water, gross output

3,150

0.13

184

18,200

6,475

24,675

Packaged Scotch Marine , steam or hot water

Packaged fire tube, #2 oil, gross output

Steam, 15 psi

8,375

0.14

231

52,500

8.325

60,825

Steam, 150 psi

6,700

0.14

223

57,000

8,025

65,025

Source: R.S. Means





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