{
 "format": "takeoffcraft-pack",
 "version": 1,
 "id": "trade.hvac",
 "name": "HVAC",
 "packVersion": "0.1.0",
 "trade": "HVAC",
 "description": "Rectangular and spiral duct by size with hangers and wrap, insulated flexible duct with supports, supply diffusers, registers and return grilles, exhaust fans, thermostats and split systems. Assemblies only: set your own rates.",
 "author": "CadCraft",
 "license": "CC0-1.0",
 "status": "starter",
 "homepage": "https://getcadcraft.com/addons?kind=pack",
 "csi": [
  "23 09 00",
  "23 31 13",
  "23 33 46",
  "23 34 23",
  "23 37 13",
  "23 81 26"
 ],
 "sources": [
  {
   "id": "smacna",
   "title": "HVAC Duct Construction Standards: Metal and Flexible",
   "publisher": "SMACNA",
   "url": "https://www.smacna.org/"
  },
  {
   "id": "imc-6",
   "title": "International Mechanical Code, Chapter 6 Duct Systems",
   "edition": "2021",
   "publisher": "International Code Council",
   "url": "https://codes.iccsafe.org/"
  },
  {
   "id": "geometry",
   "title": "Plain geometry: the quantity follows from the measured length, height or area and the stated module (no outside source needed)"
  },
  {
   "id": "adc",
   "title": "Flexible Duct Performance and Installation Standards",
   "publisher": "Air Diffusion Council",
   "url": "https://flexibleduct.org/"
  }
 ],
 "items": [
  {
   "key": "rect-12x8",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 40 in = 3.3333 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 12 x 8 in, galvanized, wrapped",
   "unit": "LF",
   "twin": "rect-12x8-m",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "SF",
     "formula": "L*3.333333",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/8)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "SF",
     "formula": "L*3.333333",
     "waste": 2000
    }
   ]
  },
  {
   "key": "rect-12x8-m",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 40 in = 3.3333 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 305 x 203 mm, galvanized, wrapped",
   "unit": "m",
   "twin": "rect-12x8",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "m²",
     "formula": "L*1.016",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/2.4384)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "m²",
     "formula": "L*1.016",
     "waste": 2000
    }
   ]
  },
  {
   "key": "rect-20x10",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 60 in = 5 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 20 x 10 in, galvanized, wrapped",
   "unit": "LF",
   "twin": "rect-20x10-m",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "SF",
     "formula": "L*5",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/8)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "SF",
     "formula": "L*5",
     "waste": 2000
    }
   ]
  },
  {
   "key": "rect-20x10-m",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 60 in = 5 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 508 x 254 mm, galvanized, wrapped",
   "unit": "m",
   "twin": "rect-20x10",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "m²",
     "formula": "L*1.524",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/2.4384)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "m²",
     "formula": "L*1.524",
     "waste": 2000
    }
   ]
  },
  {
   "key": "rect-24x12",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 72 in = 6 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 24 x 12 in, galvanized, wrapped",
   "unit": "LF",
   "twin": "rect-24x12-m",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "SF",
     "formula": "L*6",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/8)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "SF",
     "formula": "L*6",
     "waste": 2000
    }
   ]
  },
  {
   "key": "rect-24x12-m",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Sheet metal by surface: perimeter 72 in = 6 SF per LF; 15% for seams, joints and fittings (a starting figure).",
    "Hangers at 8 ft at most, plus one per run (check the SMACNA hanger table for the duct size).",
    "Duct wrap 1-1/2 in on the perimeter, 20% for overlaps and corners."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Rectangular duct 610 x 305 mm, galvanized, wrapped",
   "unit": "m",
   "twin": "rect-24x12",
   "components": [
    {
     "name": "Galvanized sheet metal duct",
     "unit": "m²",
     "formula": "L*1.83",
     "waste": 1500
    },
    {
     "name": "Duct hangers (pairs)",
     "unit": "EA",
     "formula": "ceil(L/2.4384)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "m²",
     "formula": "L*1.83",
     "waste": 2000
    }
   ]
  },
  {
   "key": "spiral-8",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Spiral duct in 10 ft lengths with a coupling each; hangers at 10 ft at most plus one per run (check the SMACNA table).",
    "Surface for wrap: 3.1416 x 8 in = 2.0944 SF per LF, 20% for overlaps."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Round spiral duct 8 in, wrapped",
   "unit": "LF",
   "twin": "spiral-8-m",
   "components": [
    {
     "name": "Spiral duct 8 in",
     "unit": "LF",
     "formula": "L",
     "waste": 1000
    },
    {
     "name": "Couplings",
     "unit": "EA",
     "formula": "ceil(L/10)",
     "waste": 500
    },
    {
     "name": "Duct hangers",
     "unit": "EA",
     "formula": "ceil(L/10)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "SF",
     "formula": "L*2.094395",
     "waste": 2000
    }
   ]
  },
  {
   "key": "spiral-8-m",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Spiral duct in 10 ft lengths with a coupling each; hangers at 10 ft at most plus one per run (check the SMACNA table).",
    "Surface for wrap: 3.1416 x 8 in = 2.0944 SF per LF, 20% for overlaps."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Round spiral duct 203 mm, wrapped",
   "unit": "m",
   "twin": "spiral-8",
   "components": [
    {
     "name": "Spiral duct 8 in",
     "unit": "m",
     "formula": "L",
     "waste": 1000
    },
    {
     "name": "Couplings",
     "unit": "EA",
     "formula": "ceil(L/3.048)",
     "waste": 500
    },
    {
     "name": "Duct hangers",
     "unit": "EA",
     "formula": "ceil(L/3.048)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "m²",
     "formula": "L*0.637743",
     "waste": 2000
    }
   ]
  },
  {
   "key": "spiral-12",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Spiral duct in 10 ft lengths with a coupling each; hangers at 10 ft at most plus one per run (check the SMACNA table).",
    "Surface for wrap: 3.1416 x 12 in = 3.1416 SF per LF, 20% for overlaps."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Round spiral duct 12 in, wrapped",
   "unit": "LF",
   "twin": "spiral-12-m",
   "components": [
    {
     "name": "Spiral duct 12 in",
     "unit": "LF",
     "formula": "L",
     "waste": 1000
    },
    {
     "name": "Couplings",
     "unit": "EA",
     "formula": "ceil(L/10)",
     "waste": 500
    },
    {
     "name": "Duct hangers",
     "unit": "EA",
     "formula": "ceil(L/10)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "SF",
     "formula": "L*3.141593",
     "waste": 2000
    }
   ]
  },
  {
   "key": "spiral-12-m",
   "type": "linear",
   "csi": "23 31 13",
   "group": "Ductwork",
   "sources": [
    "smacna",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Spiral duct in 10 ft lengths with a coupling each; hangers at 10 ft at most plus one per run (check the SMACNA table).",
    "Surface for wrap: 3.1416 x 12 in = 3.1416 SF per LF, 20% for overlaps."
   ],
   "note": "Draw the duct centerline.",
   "waste": 0,
   "name": "Round spiral duct 305 mm, wrapped",
   "unit": "m",
   "twin": "spiral-12",
   "components": [
    {
     "name": "Spiral duct 12 in",
     "unit": "m",
     "formula": "L",
     "waste": 1000
    },
    {
     "name": "Couplings",
     "unit": "EA",
     "formula": "ceil(L/3.048)",
     "waste": 500
    },
    {
     "name": "Duct hangers",
     "unit": "EA",
     "formula": "ceil(L/3.048)+N",
     "waste": 500
    },
    {
     "name": "Duct wrap 1-1/2 in",
     "unit": "m²",
     "formula": "L*0.958186",
     "waste": 2000
    }
   ]
  },
  {
   "key": "flex-6",
   "type": "linear",
   "csi": "23 33 46",
   "group": "Ductwork",
   "sources": [
    "adc",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Insulated flexible duct in 25 ft boxes; runs pulled tight, no longer than the code and the device allow.",
    "Supports at 5 ft at most (Air Diffusion Council), plus one per run; two clamps per run."
   ],
   "note": "Draw each flex run from the trunk to the device.",
   "waste": 0,
   "name": "Flexible duct 6 in, insulated",
   "unit": "LF",
   "twin": "flex-6-m",
   "components": [
    {
     "name": "Flex duct 6 in, 25 ft box",
     "unit": "box",
     "formula": "ceil(L/25)",
     "waste": 0
    },
    {
     "name": "Flex duct supports",
     "unit": "EA",
     "formula": "ceil(L/5)+N",
     "waste": 500
    },
    {
     "name": "Duct clamps",
     "unit": "EA",
     "formula": "N*2",
     "waste": 500
    }
   ]
  },
  {
   "key": "flex-6-m",
   "type": "linear",
   "csi": "23 33 46",
   "group": "Ductwork",
   "sources": [
    "adc",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Insulated flexible duct in 25 ft boxes; runs pulled tight, no longer than the code and the device allow.",
    "Supports at 5 ft at most (Air Diffusion Council), plus one per run; two clamps per run."
   ],
   "note": "Draw each flex run from the trunk to the device.",
   "waste": 0,
   "name": "Flexible duct 152 mm, insulated",
   "unit": "m",
   "twin": "flex-6",
   "components": [
    {
     "name": "Flex duct 152 mm, 7.62 m box",
     "unit": "box",
     "formula": "ceil(L/7.62)",
     "waste": 0
    },
    {
     "name": "Flex duct supports",
     "unit": "EA",
     "formula": "ceil(L/1.524)+N",
     "waste": 500
    },
    {
     "name": "Duct clamps",
     "unit": "EA",
     "formula": "N*2",
     "waste": 500
    }
   ]
  },
  {
   "key": "flex-8",
   "type": "linear",
   "csi": "23 33 46",
   "group": "Ductwork",
   "sources": [
    "adc",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Insulated flexible duct in 25 ft boxes; runs pulled tight, no longer than the code and the device allow.",
    "Supports at 5 ft at most (Air Diffusion Council), plus one per run; two clamps per run."
   ],
   "note": "Draw each flex run from the trunk to the device.",
   "waste": 0,
   "name": "Flexible duct 8 in, insulated",
   "unit": "LF",
   "twin": "flex-8-m",
   "components": [
    {
     "name": "Flex duct 8 in, 25 ft box",
     "unit": "box",
     "formula": "ceil(L/25)",
     "waste": 0
    },
    {
     "name": "Flex duct supports",
     "unit": "EA",
     "formula": "ceil(L/5)+N",
     "waste": 500
    },
    {
     "name": "Duct clamps",
     "unit": "EA",
     "formula": "N*2",
     "waste": 500
    }
   ]
  },
  {
   "key": "flex-8-m",
   "type": "linear",
   "csi": "23 33 46",
   "group": "Ductwork",
   "sources": [
    "adc",
    "imc-6",
    "geometry"
   ],
   "assume": [
    "Insulated flexible duct in 25 ft boxes; runs pulled tight, no longer than the code and the device allow.",
    "Supports at 5 ft at most (Air Diffusion Council), plus one per run; two clamps per run."
   ],
   "note": "Draw each flex run from the trunk to the device.",
   "waste": 0,
   "name": "Flexible duct 203 mm, insulated",
   "unit": "m",
   "twin": "flex-8",
   "components": [
    {
     "name": "Flex duct 203 mm, 7.62 m box",
     "unit": "box",
     "formula": "ceil(L/7.62)",
     "waste": 0
    },
    {
     "name": "Flex duct supports",
     "unit": "EA",
     "formula": "ceil(L/1.524)+N",
     "waste": 500
    },
    {
     "name": "Duct clamps",
     "unit": "EA",
     "formula": "N*2",
     "waste": 500
    }
   ]
  },
  {
   "key": "diffuser-2x2",
   "type": "count",
   "csi": "23 37 13",
   "group": "Air devices",
   "sources": [
    "smacna",
    "imc-6"
   ],
   "assume": [
    "Size each device from the air schedule; the parts here are per device."
   ],
   "note": "Count each device.",
   "waste": 0,
   "name": "Supply diffuser 24 x 24, lay-in, with plenum box",
   "unit": "EA",
   "components": [
    {
     "name": "Supply diffuser 24 x 24",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Plenum box with collar",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Balancing damper",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  },
  {
   "key": "register",
   "type": "count",
   "csi": "23 37 13",
   "group": "Air devices",
   "sources": [
    "smacna",
    "imc-6"
   ],
   "assume": [
    "Size each device from the air schedule; the parts here are per device."
   ],
   "note": "Count each device.",
   "waste": 0,
   "name": "Supply register with boot",
   "unit": "EA",
   "components": [
    {
     "name": "Supply register",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Register boot",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  },
  {
   "key": "return-grille",
   "type": "count",
   "csi": "23 37 13",
   "group": "Air devices",
   "sources": [
    "smacna",
    "imc-6"
   ],
   "assume": [
    "Size each device from the air schedule; the parts here are per device."
   ],
   "note": "Count each device.",
   "waste": 0,
   "name": "Return grille, lay-in",
   "unit": "EA",
   "components": [
    {
     "name": "Return grille 24 x 24",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Return plenum box",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  },
  {
   "key": "exhaust-fan",
   "type": "count",
   "csi": "23 34 23",
   "group": "Equipment",
   "sources": [
    "imc-6"
   ],
   "assume": [
    "Duct to the outside is measured as a run."
   ],
   "note": "Count each exhaust fan.",
   "waste": 0,
   "name": "Exhaust fan, ceiling mounted, with wall or roof cap",
   "unit": "EA",
   "components": [
    {
     "name": "Ceiling exhaust fan",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Wall or roof cap with damper",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  },
  {
   "key": "thermostat",
   "type": "count",
   "csi": "23 09 00",
   "group": "Equipment",
   "sources": [
    "imc-6"
   ],
   "assume": [
    "Control wiring is measured as a run."
   ],
   "note": "Count each thermostat.",
   "waste": 0,
   "name": "Thermostat",
   "unit": "EA",
   "components": [
    {
     "name": "Programmable thermostat",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Sub-base / wall plate",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  },
  {
   "key": "split-system",
   "type": "count",
   "csi": "23 81 26",
   "group": "Equipment",
   "sources": [
    "imc-6"
   ],
   "assume": [
    "Refrigerant line set and condensate drain measured as runs or added per the layout."
   ],
   "note": "Count each split system.",
   "waste": 0,
   "name": "Split system: furnace or air handler + condensing unit",
   "unit": "EA",
   "components": [
    {
     "name": "Furnace / air handler",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Condensing unit",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Equipment pad",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Disconnect",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    },
    {
     "name": "Filter rack",
     "unit": "EA",
     "formula": "N",
     "waste": 0
    }
   ]
  }
 ]
}