Ductwork

Ductwork Estimating Software Built for HVAC Contractors

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Ductwork projects require precise material takeoffs, CFM calculations, and labor hour estimates that account for installation conditions. Whether you're quoting a simple trunk extension or a complete duct system replacement, EstimateKit handles the math while you focus on the customer. Ductwork is often the most underestimated part of HVAC projects. Contractors forget fittings, underestimate labor in tight spaces, or miss the sheet metal costs that add up quickly. EstimateKit's duct takeoff tools ensure complete, accurate quotes.

Why Ductwork Estimating Is Different

Material takeoffs require counting linear feet of trunk, branch runs, transitions, elbows, and fittings—missing pieces means trips back to the supplier

CFM calculations for each room determine duct sizing, and undersized ducts create comfort complaints and callbacks

Attic, basement, and wall cavity installations each have different labor requirements and access challenges

Insulation requirements (R-6 to R-8 for unconditioned spaces) add material and labor costs often overlooked

Sealing and testing for code compliance takes time that needs to be included in labor estimates

EstimateKit Features for Ductwork Jobs

CFM load calculator

Input room sizes and uses to calculate airflow requirements. EstimateKit determines proper duct sizing based on CFM needs for each zone.

Material takeoff tools

Calculate linear feet of ductwork, number of fittings, transitions, registers, and boots. Generate complete material lists from your takeoff.

Installation condition multipliers

Apply labor adjustments for attic heat, crawlspace access, retrofit vs. new construction, and other site conditions that affect productivity.

Insulation calculator

Automatically add insulation requirements based on duct location (conditioned vs. unconditioned space) and local code requirements.

Duct sealing time estimates

Include time for mastic sealing, pressure testing, and code-required duct leakage verification in your labor calculations.

Sheet metal vs. flex duct comparison

Compare costs and labor for rigid metal vs. insulated flex duct options. Present both choices to customers with price differences.

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Examples of Ductwork Estimates You Can Create

Branch run extension to addition or bonus room

$800-2,000

Complete duct replacement (1,500 sq ft home)

$4,500-8,000

Duct sealing and insulation upgrade

$1,500-3,500

Return air improvement (additional returns)

$1,200-2,500

New construction duct rough-in

$2,500-5,000

Zoning dampers and controls installation

$2,000-4,500

Price ranges shown are regional averages and may vary based on location, equipment brand, and installation conditions.

How to Price Ductwork Work Profitably

Ductwork pricing combines material costs (which fluctuate with metal prices), labor hours (which vary dramatically by conditions), and specialty items like registers and grilles.

Sheet metal prices fluctuate monthly—update your material costs regularly to maintain margins

Labor productivity in attics during summer can drop 50% compared to climate-controlled spaces

Flex duct installation is faster (saving labor) but material costs are similar to rigid—factor both

Retrofit ductwork in finished homes takes 2-3x longer than new construction rough-in

Include register and grille costs—these small items add up across a whole-house installation

Pro tip: Learn more about HVAC markup strategies and pricing best practices to maximize profitability on every job.

Built for Ductwork Work

Complete duct takeoffs in 15 minutes instead of an hour

CFM calculations ensure properly sized ductwork for each room

Material lists that account for fittings, transitions, and registers

Labor adjustments for actual site conditions and access challenges

Run Your Ductwork Business for $49/Month

EstimateKit is a complete HVAC business platform—professional ductwork estimates, customer management, and job scheduling in one place. Stop juggling spreadsheets and start running your business better.

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Related Resources

HVAC Ductwork Estimation →Manual J Load Calculations →