=10.= A house as large as the one under consideration should be
heated either by steam or by hot water. However, a furnace is used in
this case, not because it is the best practice, but because it gives
practice in estimating on a furnace, which is more important than
estimating on either steam or hot water. In taking off quantities for
the heating and ventilating contract, attention should be given to
the fact that the furnace and pipes, registers and borders, and the
fireplace furniture are usually supplied by different manufacturers.
FURNACE
_Quantities and Cost_
One 53-inch cast-iron portable furnace set up in place $125.00
WARM-AIR AND SMOKE PIPES
_Quantities and Cost_
12 ft. of 4" × 8" tin W. A. pipe, at 12½ cents $ 1.50
12 ft. of 3" × 12" tin W. A. pipe, at 15 cents 1.80
13 ft. of 4" × 10" tin W. A. pipe, at 15 cents 1.95
61 ft. of 10-inch round tin W. A. pipe, at 16 cents 9.76
12½ ft. of 8-inch round tin W. A. pipe, at 12½ cents 1.56
4 ft. of 8-inch galvanized-iron smoke pipe, at 15 cents .60
17 ft. of 10-inch round, fireclay flue lining,
at 25 cents 4.25
2½ ft. of 8-inch round, fireclay flue lining,
at 20 cents .50
Labor, one-half of cost of materials 10.96
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Total $ 32.88
REGISTERS
_Quantities and Cost_
Three 14" × 16" japanned floor registers and borders,
at $3.85 $ 11.55
One 7" × 10" japanned floor register and border .85
One 12" × 15" japanned floor register and border 2.25
Two 7" × 9" japanned floor registers and borders,
at 85 cents 1.70
One 10" × 12" japanned floor register and border 1.26
Two 12" × 15" japanned wall registers and borders,
at $2.25 4.50
One 10" × 12" japanned wall register and border 1.26
Labor, one-third of cost of materials 7.79
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Total $ 31.16
TIN REGISTER BOXES
_Quantities and Cost_
Three 14" × 16" × 4", at 80 cents $ 2.40
One 7" × 10" × 4" .57
Two 10" × 12" × 4", at 75 cents 1.50
Two 15" × 12" × 4", at 75 cents 1.50
Two 7" × 9" × 4", at 57 cents 1.14
Labor, one-third of cost of materials 2.37
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Total $ 9.48
MISCELLANEOUS
_Quantities and Cost_
Fifteen elbows, 10 in. in diameter, at 35 cents $ 5.25
Two elbows, 8 in. in diameter, at 25 cents .50
Ten sheets of "IC" tin, 20" × 28", at 20 cents 2.00
Two cold-air boxes, each 24 ft. long, of 20-inch
earthen pipe, with two slide dampers and screens 38.40
Labor: one-third of cost of materials 15.38
------
Total $61.53
_Summary_
Furnace $125.00
Warm-air and smoke pipes 32.88
Registers and borders 31.16
Register boxes 9.48
Miscellaneous 61.53
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Total cost of heating and ventilating system $260.05