What does an HVAC and duct takeoff include?
HVAC and duct takeoff services measure duct by system and size in linear feet, count fittings, dampers, registers and access doors, and convert sheet metal area to weight by gauge. Each line carries its unit, measurement rule and drawing reference, delivered as an Excel workbook and PDF summary.
Our Professional HVAC & Duct Takeoff Services
A duct takeoff is only useful if the next person can retrace it. On every line we record the measurement rule (centerline length for duct, developed length for fittings), the unit (pounds, linear feet, each), the gauge or pressure class, and the drawing sheet or schedule the quantity came from. That record is what lets a sheet metal shop order coil and a project manager compare two bids line by line.
We price our hvac and duct takeoff services against national average unit costs adjusted with published U.S. wage and price data, then an estimator reviews the finished workbook. The wage side matters most for install labor; the steel mill products index moves the galvanized coil behind the duct weight. Both appear in the workbook as drivers, not as fixed numbers.
HVAC & Duct Takeoff material takeoffs
We measure rectangular, round and spiral duct by centerline linear feet, then convert to sheet metal area and weight using the gauge and pressure class shown on the plans. Fittings are counted each: elbows, tees, wyes, transitions, offsets and boots, with the fitting weight taken from the SMACNA fitting tables or the fabricator's cut sheet. Access doors, volume dampers, fire dampers and smoke dampers are listed by size and type so the supplier quote can be matched to the takeoff. Deliverable is an Excel workbook with a line per item and a PDF summary with marked-up drawing pages.
HVAC & Duct Takeoff labor cost estimates
Labor is built from the same quantities, not from a square-foot allowance. We apply installation hours per item, then price them with the HVAC mechanic and sheet metal worker wage data published by the Bureau of Labor Statistics, adjusted for the project's region and trade. Hangers and supports are broken out separately because a trapeze hanger assembly carries rod, strut, anchors and its own install time. The output shows hours and dollars per system so you can see which run is driving the labor, and our HVAC estimating team can extend the same logic to equipment and controls.
Bid-ready HVAC & duct takeoff cost estimates
For a bid, the takeoff has to close. We carry material, labor, equipment and subcontractor scopes into a single summary with a stated basis for every total, including sales tax treatment and the waste percentage applied to coil and sealant. Alternates and unit prices are listed separately so the bid form can be filled without rework. Send the plan and spec set through our quote request page and the fee is quoted per project after we review the drawings.
What Is Included in Our HVAC & Duct Takeoff Estimates?
Every estimate starts with a scope sheet that lists the drawing sheets, schedules and specifications we priced, plus any sheet we could not read. Ductwork that appears on a mechanical plan but is delegated to a sheet metal subcontractor still gets measured, so the number is available for comparison. Our hvac and duct takeoff services cover both plan-and-spec and design-build packages, and the scope sheet states which basis we measured. The same scope sheet format carries through our full-scope estimating for other divisions.
Duct, fittings, dampers and terminal units
The component list follows CSI MasterFormat Division 23 and covers the items that carry cost on most jobs:
- Rectangular, round and spiral duct by gauge and pressure class
- Flex duct by diameter and insulated length
- Fittings: elbows, tees, wyes, transitions, offsets, boots and plenum boxes
- Registers, diffusers and grilles by neck size and type
- Volume dampers, fire dampers and smoke dampers with access doors
- Hangers and supports, including trapeze hanger assemblies
- Duct sealant, mastic, tape and insulation by R-value
- Equipment connections, curbs and roof penetrations where shown
A sheet metal duct takeoff that skips the fitting list understates the job, because fittings carry more weight per foot than straight run. Our sheet metal estimating group measures them from the same drawings.
Linear feet, sheet area, duct weight and counts
Quantities are reported in the unit a fabricator or installer actually uses. Straight duct is measured in centerline linear feet and converted to sheet area in square feet, then to duct weight in pounds using the gauge table for the specified metal. Fittings are counted each with their own weight allowance, and dampers, access doors and terminal units are counted each by size. Hangers and supports are measured in linear feet of trapeze and each of anchors, so the rod and strut order matches the install sequence.
Materials, labor, equipment and cost breakdowns
Costs are separated so each can be checked against its own source:
- Material: coil, fittings, dampers, terminal units, insulation and sealant, priced from national averages adjusted with the published steel, copper and plastic construction product indexes
- Labor: install hours per item priced with BLS wage data for HVAC mechanics, sheet metal workers and the trades that support them
- Equipment: lifts, welding and cutting equipment, and crane time where the scope requires it
- Subcontractor and vendor quotes carried as received, with the quote date noted
The result is a line-item breakdown you can compare to a supplier quote or a competing bid. Labor hours are built item by item through our trade labor rate build-ups, so each rate traces back to a wage source. For the broader assembly view, see our measured quantity takeoffs.
Who Needs Our HVAC & Duct Takeoff Services?
Different readers use the same takeoff for different decisions. A mechanical contractor checks it against a fabricator quote; a general contractor checks it against the mechanical bid; an owner's representative checks it against the budget. We keep the measurement rule visible so each reader can test the number their own way, which is the point of hiring hvac and duct takeoff services rather than buying a lump sum.
Mechanical and sheet metal subcontractors
A mechanical or sheet metal subcontractor uses the takeoff to build a bid and to order material. Gauge changes between the plan and the specification, or a transition that has to be field-fabricated, can move both the coil order and the labor hours. Our hvac estimating services list those items separately so the shop drawing stage does not reopen the bid. Trapeze hanger spacing and rod sizing are shown per run, which is what the foreman needs before the first hanger goes up.
General contractors and home builders
General contractors use the ductwork quantity takeoff to level the mechanical bids and to confirm the allowance in the budget. Home builders use it to check that the Manual J load and the duct layout agree, since a short run count usually means a design gap rather than a cheap job. Our full-project cost estimating group can carry the mechanical scope into the whole-building estimate.
Developers, architects and suppliers
Developers compare the duct cost per square foot across building options before committing to a design, and hvac and duct takeoff services give them the pounds and linear feet behind that comparison. Architects use the fitting and damper counts to check that ceiling and shaft space can hold the specified routing. Suppliers and fabricators use the duct weight totals to plan coil purchases and shipping, since weight, not length, sets the freight tier. To start, use the drawing submission form and attach the mechanical specification with the plan set.
Types of HVAC & Duct Takeoff Projects We Estimate
Scope changes with building type, and so does the measurement emphasis. The table below shows where the weight of the takeoff sits for each project category we price. Our hvac and duct takeoff services follow the same rule on every category: each quantity carries its unit, the measurement rule and the source drawing sheet.
| Project type | Dominant duct types | Key quantities | Items most often missed |
|---|---|---|---|
| Single-family residential | Flex duct, small rectangular trunk | Linear feet, boots and registers each | Insulation R-value, return air pans |
| Multifamily | Rectangular trunk, flex branches | Linear feet, fire damper count | Shaft duct weight, access doors |
| Commercial office and retail | Rectangular and spiral mains | Pounds per linear foot, damper count | Smoke dampers, sealant class |
| Healthcare and laboratory | Rectangular, welded and coated | Sheet area, pressure class | Exhaust risers, access door locations |
| Industrial plant | Welded heavy gauge, lined duct | Duct weight, support steel | Vibration isolation, expansion joints |
| Parking and transit | Rectangular, smoke control duct | Linear feet, damper schedule | Stair pressurization, life safety routing |
Residential projects
Residential ductwork is mostly flex and small rectangular trunk, so the takeoff leans on boots, registers and diffusers counted each, plus the R-value of the insulation on every run. Runs are short and fitting counts are high relative to length, which is why a per-foot price alone misleads on houses. We measure from the Manual J and duct layout where they are issued, and flag the rooms where the layout and the load calculation disagree.
Commercial buildings
A commercial duct takeoff is driven by rectangular and spiral mains, pressure class and fire and smoke damper locations. Duct weight is reported in pounds per linear foot by gauge so the fabricator can plan coil, and sealant class is tied to the pressure class on the spec. Tenant fit-out work adds a second layer: dampers and access doors at each branch takeoff, and transitions at every equipment change. These scopes run through our sheet metal estimating group, which prices each fitting by type and gauge rather than as a percentage of duct length.
Industrial and infrastructure projects
Industrial work brings welded duct, heavier gauges, abrasion-resistant liners and supports designed for vibration, so hanger and support steel becomes a major line rather than an allowance. Infrastructure scopes such as parking structures and transit stations add smoke control and stair pressurization duct, where damper schedules and access door locations must be traced to the life safety drawings. The civil and structural side of the same packages goes to our construction cost estimating team, and the two takeoffs share one drawing set.
Our HVAC & Duct Takeoff Estimating Process
We run every job as a fixed sequence, and each step ends with a check that someone signs off on. The output is a ductwork quantity takeoff you can price, compare against a subcontractor bid, or hand to a purchasing desk. Send your plans and specs through the plan submission page and the review starts with the sheet index and the Division 23 specification sections. This is how our hvac and duct takeoff services begin on every set, whether the drawings are plan and spec or design-build.
Submit drawings and specifications
We need the mechanical drawings, the architectural floor plans that set ceiling heights, the equipment schedules, and the Division 23 specification sections that name gauge, sealant class, insulation and hanger spacing. A reflected ceiling plan matters because register and diffuser locations drive the branch layout. If the set is design-build, we ask for the design narrative and the engineer's basis of design instead of a full spec book.
Plan review and digital takeoff
The estimator scales each sheet, confirms the drawing scale against a known dimension, and traces every run on screen. Rectangular duct is measured by centerline length and converted to pounds using the gauge and duct size from the schedule, with reinforcement and joint allowances called out separately. Fittings are counted, not scaled: elbows, tees, wyes, transitions, boots and offsets each get a line. Registers, diffusers and grilles are counted from the ceiling plan and reconciled to the schedule, and insulation is measured by the area of duct surface covered, not by linear duct length.
Cost calculation, quality checks and delivery
Material quantities are priced from a national unit cost base, then adjusted for the project's wage area and for the material indices shown further down this page. A second estimator checks the takeoff against the drawing sheet count, the fitting count against the branch layout, and the total duct weight against a pounds-per-square-foot sanity range for the building type. You receive an Excel workbook, a PDF summary and marked-up drawing pages, with every assumption written on its own line so you can see which rule produced the number. Those marked-up sheets are what most clients carry into subcontractor bid comparison, and they are the same record we use when the hvac and duct takeoff services are reviewed a second time.
Sample HVAC & Duct Takeoff Estimate and Deliverables
The example below is illustrative and is not a quote. Assumptions: a single-story commercial tenant fit-out of 12,000 sq ft, one rooftop unit, 180 linear feet of rectangular trunk at 24x12, 240 linear feet of round duct at 10-inch diameter, 42 ceiling diffusers, and 1,100 sq ft of external duct wrap. Unit costs are placeholders in the range we would expect for a mid-Atlantic wage area and are shown only to demonstrate the arithmetic. Our HVAC takeoff work follows this same line structure on live projects, and the same sheet feeds a priced estimate for the full package when the owner wants every division rolled up.
| Line item | Quantity | Unit | Measurement rule | Illustrative unit cost | Extended cost |
|---|---|---|---|---|---|
| 24x12 rectangular trunk, 24 ga | 180 | LF | Centerline length of each run, summed by size | $38.00/LF | $6,840.00 |
| 10 in round duct, 26 ga | 240 | LF | Centerline length, excluding fittings | $14.50/LF | $3,480.00 |
| Fittings (elbows, tees, wyes, transitions) | 36 | EA | Counted at each node on the marked-up plan | $95.00/EA | $3,420.00 |
| Ceiling diffusers with boots | 42 | EA | Counted from the air device schedule | $120.00/EA | $5,040.00 |
| Volume dampers | 18 | EA | Counted at branch takeoffs | $85.00/EA | $1,530.00 |
| Trapeze hangers and supports | 70 | EA | One per 6 LF of run, rounded up per run | $45.00/EA | $3,150.00 |
| External duct wrap, 1-1/2 in | 1,100 | SF | Developed surface area of insulated duct | $3.20/SF | $3,520.00 |
| Sealant and mastic | 1 | LOT | Allowance per SMACNA seal class specified | $650.00/LOT | $650.00 |
| Illustrative total | Sum of extended costs above | $27,630.00 |
Excel quantity takeoff sheet
The workbook carries one row per item with the quantity, the unit, the measurement rule that produced the quantity, and the drawing sheet it came from. Duct runs are separated by size and gauge so a change in one size does not force a re-takeoff of the whole system. Round duct is listed by diameter and linear feet, and fittings sit on their own rows so a purchasing clerk can order them directly. Duct weight is carried as a computed column: pounds per linear foot for the gauge and perimeter, multiplied by the run length, so the sheet metal package can be bid by weight as well as by area.
Marked-up drawings
Every traced run is highlighted on a copy of the mechanical plan, with the run length written at the midpoint and the fitting count tagged at each node. Diffusers and other air devices are circled and numbered to match the workbook rows. The markup lets your foreman compare the sheet to the field without re-measuring, and it is the page we point to when a reviewer questions a quantity.
Itemized cost estimate
The cost tab applies labor hours per unit, the wage rate for the trade, material unit cost and a separate line for hangers, sealant and insulation. Sales tax, permits and general conditions stay outside the sheet unless you ask for them. The table shows how the illustrative line items roll up to a total, and the same structure carries into the labor cost breakdown when you need hours separated from material.
Software and Pricing Data We Use
The chart below shows the Producer Price Index series for the materials in this scope, rebased to 100 so the direction of each series is comparable on one axis. Read it alongside the wage table for the trades that install the work. Both are inputs to the estimate, not the estimate itself.
Takeoff and estimating software
Our estimators work in three tool categories: on-screen PDF takeoff for tracing runs and counting fittings, spreadsheet estimating for the line-item build-up, and a unit cost database that holds the assembly rules. The duct fitting takeoff is counted on screen at each node, which keeps elbows, tees and transitions from being double-counted when a run crosses a sheet break. Spiral duct and other round products are measured by centerline length, and grilles and air devices are counted against the schedule.
Regional material and labor pricing method
We start from national average unit costs, then adjust with published U.S. Bureau of Labor Statistics wage data for the trade doing the work and with Producer Price Index movement for steel, copper and plastic construction products. Location factors, prevailing wage requirements on public work, and project conditions such as occupied-space work or high ceiling heights are applied as separate, visible adjustments. The calculator below and the wage table below show the current inputs; the chart shows where material prices have moved. Every adjustment line names its source so you can audit the total. Our pricing method for building estimates page explains how the same approach applies outside Division 23.
Material price movement, Oct 2023 to Sep 2026
| Occupation | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Sheet metal workers | $22.99 | $29.71 | $39.24 |
| HVAC mechanics and installers | $23.25 | $29.33 | $37.05 |
| Construction laborers | $18.57 | $22.66 | $28.72 |
Base wages before payroll taxes, insurance and benefits. Source: BLS Occupational Employment and Wage Statistics, national, all industries.
Why Contractors Choose Our Estimating Services
The reasons are procedural, not promotional. Each one describes a step you can check on the delivered workbook.
Trade-specific expertise
Ductwork is priced by weight and by count, not by floor area, and our estimators work that way. A rectangular duct takeoff converts size and gauge to pounds per linear foot, while flex duct is measured along its installed path with the sag allowance stated. Volume dampers, fire dampers and access doors are counted individually and tied to the equipment schedule. Each cut sheet for a rooftop unit or fan is checked against the curb and connection details before the accessory line is priced.
Quality control and clear assumptions
Every estimate carries an assumptions page: drawing revision, spec section used for gauge, sealant class, insulation R-value, and whether hangers are priced per foot or per support. A second estimator checks the fitting count and the total duct weight before release. If a drawing is silent on gauge, we state the value we used rather than hiding it in a unit cost.
Turnaround, communication and revisions
Delivery dates are agreed when we review the drawing set, because a 40-sheet mechanical package and a 4-sheet tenant fit-out are different jobs. We confirm the date in writing with the quote. Revisions from an addendum or a design change are handled as a marked-up delta against the original workbook, so you can see exactly which quantities moved. Send the drawing set through our drawing submission form and we will confirm scope and schedule before any takeoff begins.
HVAC & Duct Takeoff Services Pricing
The fee for our HVAC and duct takeoff services is quoted per project after an estimator has reviewed the plans, so there is no rate card to publish. We price the work from the sheet count and the scope behind each sheet: a Division 23 set with a full equipment schedule and matched duct layouts takes less time than a design-build package where sizes and routing have to be read off the architectural backgrounds. You receive the quoted fee before any work starts, and it covers the Excel workbook, the PDF summary and the marked-up drawing pages.
Send the complete bid set, including alternates and every addendum, and the quote reflects the actual scope. A spiral duct takeoff priced from a partial set will be re-quoted once the remaining sheets arrive.
| Input | Unit | What it changes |
|---|---|---|
| Base wage | $ per hour | Starting point for the loaded rate |
| Burden | % of base wage | Adds payroll taxes, insurance and benefits |
| Overtime share | % of hours | Raises the blended rate above straight time |
| Crew size | workers | Multiplies hours into crew labor cost |
| Hours | hours | Total straight-time and overtime hours |
| Loaded rate | $ per hour | Base wage plus burden |
| Blended rate | $ per hour | Loaded rate adjusted for overtime hours |
| Crew labor cost | $ | Blended rate times total hours |
How quotes are calculated
We count the drawing sheets and separate them by system: supply, return, exhaust, outside air, kitchen hood and smoke control. Each sheet is then scoped for the items that drive time, such as duct fittings scheduled on a detail sheet, fire dampers shown only in a schedule, and equipment tagged on the floor plans but specified elsewhere. That sheet-and-scope count, not a square-foot rate, sets the fee. Where shop drawings exist, they tighten the count because duct sizes and elevations are already resolved.
What affects price and delivery time
Fees rise with the number of alternates, the volume of addenda, and the amount of ductwork detailed only in schedules rather than on plans. A project with a full mechanical specification, coordinated reflected ceiling plans and a complete damper schedule takes less estimating time than one where duct routing must be inferred. We do not publish a delivery time; the schedule is agreed when the fee is quoted. The calculator below returns a loaded labor rate from base wage, burden percentage, overtime share, crew size and hours, which helps you compare our fee against your own in-house takeoff hours. For the wider mechanical scope, see our pricing for full construction cost estimates.
Loaded labor rate calculator
- Loaded rate
- $40/hr
- Blended with overtime
- $42/hr
- Labor hours
- 320
- Crew labor cost
- $13,476
Burden covers payroll taxes, workers’ compensation, insurance and benefits; it varies by state, trade and company. Overtime is priced at time and a half.
HVAC & Duct Takeoff Services Across the US
Wage levels differ by metro, and public work adds prevailing wage requirements that change the labor side of an hvac material takeoff even when the duct quantities are identical. We apply published wage data by trade and adjust from there, so a sheet metal crew in one state and a crew in another do not carry the same rate. Material delivery also moves the number: long runs of spiral duct and large-radius elbows cost more to land on a remote site than in a metro with several fabricators.
Climate and code drive scope. Cold-climate schools carry more outside-air duct and insulation, while coastal projects add corrosion-resistant supports and hangers. Seismic zones change the bracing on trapeze hangers, and local amendments to the mechanical code can add smoke dampers at corridor penetrations. On plan and spec work our hvac and duct takeoff services estimate to the stamped documents and the specification section; on design-build we estimate to the basis-of-design narrative and flag the assumptions. One team covers all states, and you can submit your plans through the drawing submission form with the project location noted.
Frequently Asked Questions
How much does an HVAC & duct takeoff estimate cost?
The fee is quoted per project after we review the plans, so it depends on drawing count, sheet count, and how much of the system is specified versus left to the contractor. Ductwork quantity takeoff scope drives the price: a plan-and-spec job with schedules and gauge notes takes less review than a design-build set with performance criteria only. Send the set and we return a quoted fee before any work begins.
How long does an HVAC & duct takeoff takeoff take?
The delivery date is set when we quote, based on drawing volume, the number of duct systems, and whether equipment schedules and fitting details are complete. A set with legible mechanical plans and schedules moves through review faster than one where sizes must be scaled from risers. We confirm the date in writing with the quote, so you can plan your bid calendar around it.
Do you estimate labor and material costs?
Yes. Each line carries a quantity, a unit, and a unit cost built from national average pricing adjusted with published U.S. wage and price data, then reviewed by an estimator. Sheet metal duct takeoff quantities convert to pounds using gauge and perimeter, and labor hours follow the installation method you specify. You see the arithmetic behind every extended price, not just a lump sum.
What drawings do you need?
Send the mechanical plans and specifications, equipment schedules, and any available duct sizing or fitting details, plus architectural floor plans for routing context. Reflected ceiling plans help place diffusers and grilles. If you have cut sheets or shop drawings, include them. Incomplete sets are workable, but we note assumptions on the summary so you can confirm them before pricing.
Can you use my estimate template?
Send your template with the plans and we will confirm whether the estimate can be delivered in it before quoting. Most Excel-based formats map cleanly to our line structure, and we keep your CSI MasterFormat Division 23 line numbering and cost codes intact. If a template needs custom columns or formulas, we tell you at quote stage rather than after delivery.
Do you sign NDAs?
Clients can request an NDA before sending drawings, and the terms are agreed before plan review starts. Send the document you want signed and we confirm the terms first. Drawings stay with the estimator assigned to the project and are not shared outside the review team. We do not publish client names or project details.
What is included in hvac and duct takeoff services?
Our hvac and duct takeoff services cover rectangular, round, spiral, and flex duct by linear feet; fittings counted by type, size, and gauge; dampers, access doors, hangers, sealant, and insulation; and equipment from schedules. Duct weight is calculated in pounds from gauge and perimeter so steel pricing can be applied. Deliverables are an Excel workbook, a PDF summary, and marked-up drawing pages.
How do you calculate duct weight for a rectangular duct takeoff?
Weight comes from perimeter, length, and gauge. For a rectangular duct, add the four sides to get perimeter in inches, multiply by length in feet, convert to square feet, then apply the pounds-per-square-foot value for the specified gauge. Elbows, tees, and transitions are taken off separately because their developed area exceeds the straight run. Each weight line shows the formula used.
Do you take off duct fittings separately from straight duct?
Yes. Elbows, tees, wyes, transitions, boots, and offsets are counted by type, size, and gauge rather than absorbed into the straight-run total. Fitting takeoff matters because fabricated fitting weight per piece is higher than straight duct of the same gauge. Separating them lets you compare shop fabrication pricing against field-cut allowances.
How do you handle hangers, supports, and seismic restraints?
Trapeze hangers, clevis hangers, and riser clamps are counted from the routing and spacing rules in the specification, with rod size and length noted per support type. Seismic restraint requirements are taken from the structural or mechanical general notes and listed as a separate line. Unistrut and strut channel are measured in linear feet. Where spacing is not stated, we flag the assumption.
Can you estimate a design-build HVAC project without full drawings?
Yes, with stated assumptions. Design-build sets often give performance criteria, zone counts, and equipment schedules but no duct layout, so we build quantities from typical routing and note every assumption on the summary. Manual J load results, when provided, anchor equipment sizing. Confirm the assumptions before you price, since they carry the most risk in the estimate.
Do you break out insulation, sealant, and access doors?
Insulation is measured in square feet of duct surface with the specified R-value and facing noted, since thickness affects both material and labor. Sealant is taken off by duct class and joint length. Access doors, volume dampers, fire dampers, and smoke dampers are counted by size and rating from the plans and schedules. Each is a separate line you can price or delete.
Do you price HVAC equipment from schedules?
Equipment is listed from the schedules by tag, capacity, and configuration, with each unit as its own line so you can substitute an approved equal. Where schedules are missing, we list what the plans show and flag the gap rather than guessing capacity. Cut sheets you supply are matched to tags. This keeps the equipment section auditable against the specification.