Page 497 - 2018 National Home Improvement

2018 National Home Improvement Estimator, All Rights Reserved Page 397

Counterflow gas-fired forced air furnace. When ducting is run under the floor and below the level of
the furnace, a counterflow circulation furnace is required. Specs are the same as for a conventional gas
furnace, but the furnace cost will be higher. Add the following to either conventional or perimeter gas
furnace costs.
Add for counterflow furnace to 125,000 Btu P1@3.50 Ea 213.11 138.80 351.91
Add for counterflow furnace over 125,000 Btu P1@6.00 Ea 635.29 238.00 873.29

Horizontal flow gas-fired forced air furnace. When space is restricted, a horizontal flow furnace
may be the best option available. Specs are the same as for a conventional gas furnace, but the furnace
cost will be higher. Add the following to either conventional or perimeter gas furnace costs.
Add for horizontal furnace to 125,000 Btu P1@2.50 Ea 165.64 99.18 264.82
Add for horizontal furnace over 125,000 Btu P1@4.75 Ea 577.72 188.40 766.12

Oil-fired forced air furnace. Furnace and duct costs will be the same as for a gas-fired furnace. But
add the following costs, which include storage tanks, gauge filter, vent and oil supply piping to the
furnace. Add the cost of excavation for buried tanks or sight-screen fencing for above-ground tanks.
275 gallon basement fuel tank P1@3.75 Ea 1,070.60 148.80 1,219.40
Twin 275 gallon basement tanks P1@5.25 LS 2,525.00 208.30 2,733.30
Concrete block foundation P1@2.00 Ea 45.85 79.34 125.19
Exterior 550 gallon fuel tank P1@8.00 Ea 1,838.20 317.40 2,155.60
Exterior 1,000 gallon fuel tank P1@14.0 Ea 2,525.00 555.40 3,080.40

Remove and replace a gas-fired furnace. Using existing duct runs. Includes removal of the existing
furnace and disposal, a new furnace with an A.G.A. certified ignition system, supply and return air
plenums, filters and humidifier, connection to existing duct runs, new chimney pipe, and a new
thermostat.
80,000 Btu P1@22.0 Ea 2,312.90 872.70 3,185.60
100,000 Btu P1@22.8 Ea 2,444.20 904.50 3,348.70
125,000 Btu P1@24.0 Ea 2,656.30 952.10 3,608.40
150,000 Btu P1@25.0 Ea 2,878.50 991.80 3,870.30
175,000 Btu P1@25.8 Ea 3,282.50 1,023.00 4,305.50
Add when replacing a gravity furnace P1@2.00 Ea 91.41 79.34 170.75

Install duct runs. New work, such as for a room addition. Including diffusers and floor or wall registers.
Duct suitable for either cold or warm air. Add the cost of wall, floor or ceiling refinishing, as required.
Inside or outside wall, per run P1@2.00 Ea 118.17 79.34 197.51
Cold air central return duct P1@3.00 Ea 111.10 119.00 230.10
Add per run for second floor ducting P1@1.50 Ea 40.80 59.51 100.31
Add for insulation, per SF of surface P1@.030 SF 0.79 1.19 1.98

Central humidifier. Added to an existing furnace or installed with a new furnace. Based on evaporation
capacity. A 1,500-square-foot house (6 rooms) needs a 10-gallon-per-day humidifier. A
2,000-square-foot house (7 rooms) needs a 12-gallon-per-day humidifier. A 3,500-square-foot house (8 to
10 rooms) needs a 20-gallon-per-day humidifier.
10 gallons per day, with new furnace P1@3.75 Ea 222.20 148.80 371.00
10 gallons per day, existing furnace P1@4.00 Ea 254.52 158.70 413.22
12 gallons per day, with new furnace P1@4.00 Ea 252.50 158.70 411.20
12 gallons per day, existing furnace P1@4.25 Ea 269.67 168.60 438.27
20 gallons per day, with new furnace P1@4.50 Ea 321.18 178.50 499.68
20 gallons per day, existing furnace P1@4.75 Ea 349.46 188.40 537.86

Central air conditioning. Added to an existing forced air furnace. Includes remote condenser and pad,
coils and cabinet, refrigeration tubing, new thermostat, electric wiring and connection.
2 ton, to 1,000 square feet P1@16.0 Ea 2,787.60 634.70 3,422.30
3 ton, to 1,600 square feet P1@18.0 Ea 3,959.20 714.10 4,673.30
5 ton, over 2,000 square feet P1@20.0 Ea 5,211.60 793.40 6,005.00