· 5 min read · TradeBid editorial team
HVAC Takeoff Software: From Plan Set to Bid
How HVAC subcontractors take off equipment, ductwork, piping and controls from plans and turn them into a clear, reviewable line-item bid.
The short answer: HVAC takeoff software helps you capture equipment, ductwork, grilles, piping and controls from a plan set and organize them for pricing. Since HVAC bids mix big equipment costs with lots of labor-heavy duct and piping, keeping quantities tied to line items is what makes the bid easy to check and defend.
What an HVAC takeoff has to capture
- Equipment: rooftop units, furnaces, air handlers, condensing units, heat pumps, VRF systems, exhaust fans, unit heaters and ERVs, taken from the equipment schedules.
- Ductwork: rectangular, round and spiral duct by size and gauge, plus fittings, transitions, dampers and flex connections.
- Air devices: supply diffusers, return and exhaust grilles, registers and louvers, counted by type and size.
- Piping: refrigerant, condensate, hydronic and gas piping, by size and material.
- Insulation: duct wrap or liner and pipe insulation, if it's in your scope.
- Controls: thermostats, sensors, control wiring and any building automation scope.
- Startup work: test and balance, startup, commissioning support, cranes and roof curbs.
How to approach an HVAC takeoff
- Get the full set. M-sheets, equipment schedules, details, specs and addenda. Check the architectural sheets for ceiling heights and the structural sheets for roof openings.
- Read the specs. Duct construction standards, insulation, controls and who handles test and balance all affect cost.
- Take off equipment first. It's the biggest single cost and drives supports, curbs, crane time and connections.
- Measure duct by size and type. Work system by system. Use weight per foot or your own pricing method for rectangular duct, and count fittings.
- Count air devices by tag and size from the plans and schedules.
- Measure piping for refrigerant, condensate and hydronic systems.
- Apply labor, adjusted for ceiling height, access, roof work and phasing.
Where takeoff software saves time
- Measuring duct and pipe on PDFs at scale instead of with a scale ruler on paper.
- Keeping equipment, duct and devices grouped by system so pricing is organized.
- Producing a clean proposal that separates base scope, alternates and exclusions.
With TradeBid, you upload plans and scope documents, choose HVAC, and get a draft line-item bid with quantities, labor, materials, markup and exclusions. You review and edit every line, then export a branded PDF proposal.
What to check before you submit
- Equipment counts and sizes match the schedules, including any alternates.
- Duct and piping quantities are reasonable for the floor area and system type.
- Crane, rigging and roof curbs are priced or excluded.
- Electrical connections and controls wiring are clearly assigned.
- Test and balance and commissioning are in or out.
- Permits, startup and warranty terms are stated.
Common mistakes on HVAC bids
- Missing exhaust systems shown only on the plumbing or architectural sheets (restroom exhaust, dryer vents, kitchen hoods).
- Not checking ceiling space. Tight plenums mean slower installs.
- Underpricing controls when the spec calls for a specific system.
- Leaving out cranes, even though they can be a big line on rooftop jobs.
Turning the takeoff into a proposal
Group the proposal by system: equipment, ductwork, piping, controls, startup. List alternates (such as equipment substitutions) separately, and spell out exclusions. See the sample bid for a format that's easy to compare.
Worked example: one rooftop unit system
Example inputs to show the method, not prices:
- One 10-ton rooftop unit from the equipment schedule, with its roof curb and economizer.
- Supply and return mains: rectangular duct measured by size, about 180 LF total, plus 40 LF of round branch duct.
- Air devices: 14 supply diffusers and 6 return grilles from the plans.
- Line items: unit (each), curb (each), crane and rigging (lump), rectangular duct (lbs or LF by size), round duct (LF), fittings (each), diffusers and grilles (each), duct insulation (SF), thermostat and controls (each), startup, and labor by item.
Grouping by system keeps big equipment costs separate from labor-heavy duct, so the GC can see where the money goes.
Setting labor that matches your crew
Quantities are only half the bid. The other half is how long your crew takes to install them. The most reliable HVAC estimators keep their own production rates for pieces of equipment, pounds or feet of duct, and air devices, built from past jobs, and adjust them for ceiling space, roof access, crane days and phasing.
A simple way to start:
- Pick three or four recent jobs where you know the hours.
- Divide the hours by the quantities installed to get hours per unit.
- Write down the conditions on each job, so you know when to adjust up or down.
- Update the rates after every job you finish.
Then multiply by your loaded labor rate, meaning wages plus taxes, insurance and benefits, not just the hourly wage. That's what turns a takeoff into a number you can trust. Add overhead and profit as a separate, intentional markup, so you can see exactly what you're charging for and adjust it job by job.
Presenting the bid so GCs can compare it
Most GCs line up several HVAC bids side by side. Make yours easy to read: one base price, scope grouped by system or area, alternates priced separately, a short list of named exclusions, your schedule assumptions, and how many days the price is valid. A clean, branded PDF that answers their questions up front saves a round of phone calls and makes your number look more reliable.
FAQ
What is HVAC takeoff software? It's software that helps you count HVAC equipment and devices and measure duct and piping from digital plans, organized for pricing.
How do I estimate ductwork from plans? Measure each run by size and type at the drawing scale, count fittings, and apply your own pricing method, such as weight per foot or price per foot by size.
Does software pick my equipment prices? You stay in control. TradeBid drafts line items, and you edit materials, labor and markup to match your supplier quotes and crew.
How does TradeBid help HVAC contractors? Upload plans, pick HVAC, review the draft line-item bid, edit it and export a branded PDF.
What does it cost? Apprentice is $149/month (up to 5 bids), Journeyman is $300/month and Master is $850/month, or $100 for a single bid. Every plan starts with a 7-day trial. See pricing.
Bidding an HVAC job? Start for $0.00. See the HVAC trade page.