Scope and deliverables
SMACNA-Compliant HVAC Takeoff Services
HVAC estimating follows mechanical drawings, equipment schedules and specifications. Duct sizes and gauges, fittings, insulation and controls affect measured quantities and installation scope.
At F&K Estimatings, our mechanical estimators quantify specified duct sizes, gauges, fittings, insulation and supports from the supplied documents. Unresolved requirements are listed as clarifications or allowances for contractor review.
For priced HVAC estimates, the labor and material pricing basis is agreed in writing and documented alongside assumptions and exclusions. Delivery is confirmed after document review; send the mechanical drawings, schedules and bid date for a written quote confirming the scope, fee and delivery date after document review.
Scope, price, and delivery are confirmed after reviewing the project documents and requested deliverables.
Deliverables for your agreed scope
Color-Coded PDF Markups
High-resolution drawing sheets with every line item, area polygon, and linear foot color-coded in Bluebeam.
Itemized CSI Excel Schedules
Measured quantities organized by CSI MasterFormat, with units and separately stated waste allowances. Labor, material and equipment rates are included only in an agreed priced estimate.
Project-Specific Pricing Basis
Cost assumptions are stated in the written proposal and can use client rates, supplier quotes, or another identified basis.
Pre-Bid RFI & Scope Gap Audit
Scope-gap notes and drawing clarifications for the agreed trades. A separate constructability review is included only when specified in the written quote.
Contractors and builders we serve
Mechanical Subcontractors
Bidding on commercial HVAC systems, tenant improvements, industrial ventilation, and VRF systems.
Sheet Metal Fabricators
Quantifying ductwork tonnage, fitting breakdown, and shop fabrication labor hours.
General Contractors
Validating mechanical sub-tier bids and ensuring equipment lead times match project schedules.
Controls & BMS Contractors
Quantifying sensor counts, DDC points, wire drops, and software commissioning hours.
Insulation Contractors
Estimating square footage of duct wrap and linear footage of pipe insulation.
HVAC: quantities, checks and quote requirements
HVAC takeoffs convert ductwork into weight and surface area, count air devices, dampers and equipment, and measure refrigerant, hydronic and condensate piping.
Measurement and reporting basis
- Ductwork by weight and area (LB / SF)
- Air devices, dampers and accessories (EA)
- Rooftop units, air handlers and terminals
- Refrigerant, hydronic and condensate piping (LF)
- Duct and pipe insulation
Documents to include
- Mechanical plans and schedules
- Equipment schedule
- Mechanical specifications and controls sequence
Also identify the current revision, addenda, project ZIP code, requested trades and bid deadline.
A scope check before pricing
Separate duct LF or surface area from sheet-metal weight. Cross-check equipment EA, fittings, insulation, hangers and controls; keep TAB, startup and equipment connections visible by responsible trade.
Scope limits: Equipment selection, load calculations, refrigerant-charge design and commissioned performance are excluded.
Worked estimating example
Use duct size before converting length to surface area
For a straight 10 × 12-inch rectangular duct at 25 LF, perimeter-based surface area is 2 × (10 + 12) ÷ 12 × 25 = approximately 91.67 SF before fabrication allowances.
- What the estimate should record
- Keep elbows, transitions, seams and insulation separate from that straight-duct calculation. Duct LF alone is not sheet-metal weight or a complete fabrication quantity.
- Resolve before pricing
- Which duct dimensions, pressure classes and fitting details are actually specified?
HVAC takeoff services for mechanical contractor bid packages
HVAC contractors can request ductwork, equipment and mechanical piping quantities from a coordinated bid set. Our mechanical takeoff services cover the agreed HVAC systems, with specialist packages identified for separate review or supplier quotation. Include schedules and risers so the measured scope can be reconciled with equipment connections.
Duct and air-distribution takeoff
Requested output: Duct sizes, lengths, fittings and terminal counts by system.
Confirm in your quote: Liner, external insulation, hangers, dampers and fabrication conventions.
Equipment and piping
Requested output: Scheduled equipment and measured hydronic or refrigerant pipe runs.
Confirm in your quote: Sizes, fittings, valves, supports and the agreed equipment connection points.
Mechanical installation estimate
Requested output: Quantities priced using agreed equipment, labor and material inputs.
Confirm in your quote: Controls, balancing, testing, commissioning and crane or rigging ownership.
Reconcile equipment schedules with plans and revisions. Thermal loads, equipment selection and system design remain with the project designer; estimating identifies the shown scope and unresolved information.
Request this estimating scopeUS project coverage for hvac
For US projects, include the ZIP code and the location-sensitive inputs below.
- Provide specified equipment schedules, duct or piping details and project-area vendor quotations.
- Identify roof access, equipment lifting, work windows and TAB or startup responsibility separately from measured equipment and distribution quantities.
The proposal records the pricing date, cost sources and unconfirmed allowances. Explore US service area information or send your project details for a scope quote.
Use the document checklist above to request quantities only, a priced estimate or a review of an existing bid.
Request a hvac scope quoteScope coverage for your bid package
CSI Division 23 31 - Sheet Metal Ductwork
Rectangular, spiral round, flat oval ductwork (lbs/SF), TDC/TDF joints, and turning vanes.
HVAC Equipment & Packaged Units
Rooftop units (RTUs), chillers, cooling towers, air handling units (AHUs), and exhaust fans.
Air Distribution & Terminal Units
VAV boxes, fan-powered terminals, diffusers, linear grilles, and fire/smoke dampers.
Hydronic & Refrigerant Piping
Chilled water, hot water heating loops, condenser water, VRF refrigerant lines, and condensate drains.
Thermal Duct & Pipe Insulation
Fiberglass duct wrap (FSK), internal acoustic duct liner, and closed-cell pipe insulation.
DDC Building Automation & Controls
Thermostats, DDC field controllers, BACnet networking, motorized control valves, and sensors.
HVAC estimating services for contractor bids
Mechanical contractors and sheet metal subcontractors can request HVAC estimating services for a complete mechanical package or a defined ductwork takeoff. Specify quantities only or a priced estimate so the output fits your bidding workflow.
Define your bid package
- Separate duct lengths or sheet metal weights by size and material, and identify fittings, insulation, dampers and supports rather than combining the system into one allowance.
- Reconcile equipment tags against the schedule, then identify curbs, accessories and controls interfaces that may be supplied by another contractor.
- Keep hydronic piping and refrigerant lines distinct from air distribution. State the drawing basis for routing and any unshown connections.
Documents to send for a scope quote
Send mechanical plans, equipment schedules, specifications, control diagrams, issued addenda and the bid deadline. Identify floors, phases and alternates to include.
For mechanical estimating services covering several trades, define the plumbing and electrical boundaries separately. Design calculations, equipment selection and commissioning execution are not implied by a duct takeoff.
Related estimating scope
Sample CSI Division 23 Quantification Schedule
Ductwork poundage, VAV box counts, duct insulation, and VRF systems:
Worked estimating example. Quantities show the stated scope and format; this is not a client project or a project-specific price quote.
| CSI Scope Description | Quantity | Unit | Waste Allowance | Estimator Code Note |
|---|---|---|---|---|
| Division 23 31 13 - Rectangular Galvanized Duct (2in. W.G. Medium Pressure) | 14,800 | LB | 15% Fitting Cut | Includes SMACNA gauge specs, TDC flanges, and trapeze hangers |
| Division 23 36 00 - Pressure-Independent VAV Terminal Units (with Hot Water Reheat) | 28 | EA | N/A | Includes factory DDC controller, reheat coil, and duct transition |
| Division 23 07 13 - 1.5in. Duct Wrap Insulation (FSK Faced Fiberglass) | 12,400 | SF | 10% | Applied to all unconditioned plenum supply and outside air ductwork |
| Division 23 81 26 - Multi-Zone VRF Heat Recovery System (Outdoor Units + FCUs) | 6 | SYS | N/A | Includes branch selector boxes and refrigerant line set allowance |
See a representative hospital HVAC estimating walkthrough for equipment schedules, MEP coordination and project assumptions.
From document review to your deliverables
- 01
Share the current bid set
Send issued drawings, specifications, addenda, location and deadline. Identify the trade packages and outputs you need.
- 02
Agree the written scope
Confirm included work, exclusions, estimating fee and delivery date before work starts.
- 03
Measure and review
Organize the agreed quantities or review findings. Record assumptions, missing information and scope clarifications.
- 04
Receive the agreed package
Review the deliverables against the written scope. Raise questions and identify any later drawing revisions separately.
Software and reporting standards
Measured quantities follow the agreed scope and are organized by applicable CSI MasterFormat divisions. Pricing sources and assumptions are identified separately when a priced estimate is requested.
| Software / tool | Purpose | Reporting basis |
|---|---|---|
| PlanSwift Pro | Digitized linear, count, and area takeoff quantification | Industry Benchmark |
| Bluebeam Revu | Vector drawing markup, multi-discipline overlay & RFI logging | CSI MasterFormat |
| Client Rates / Supplier Quotes | Project-specific pricing basis when a priced estimate is requested | Assumptions Stated |
Estimating fees and delivery
Most single-trade estimates are delivered in 24–48 hours; larger packages take longer and the written quote confirms the date Exact fee and date are confirmed in the written quote.
| Scope / project type | Typical delivery | Typical fee |
|---|---|---|
| Single-trade material takeoff | Typically 24–48 hours after approval | $150–$1,000 typical |
| Residential construction estimate | Typically 2–4 business days after approval | $400–$1,000 typical |
| Commercial preconstruction package | Typically 3–5 business days after approval | $150–$1,000 typical |
| Industrial & heavy civil takeoff | Typically 4–7 business days after approval | $1,000–$5,000+ typical |
| Ongoing estimating support | Priority queue agreed in writing | $1,800/mo typical |
These are estimating-service fees. Drawings, scope and requested delivery determine the written proposal.
Frequently asked questions
How do you quantify sheet metal ductwork weight and waste?
Ductwork can be quantified by size, type, length or sheet-metal weight depending on the drawings and requested deliverable. Joint, liner, fitting and waste assumptions are listed separately where they are included in the agreed scope.
Do you catch clashes between large duct mains and structural steel?
Yes. During our plan review, if we identify a 36x24 medium-pressure supply trunk routed through a ceiling cavity with 18-inch steel bar joists, we immediately flag the constructability conflict so you can issue an RFI or price offset transitions before bid day.
How do you handle DDC building automation and HVAC controls?
Controls scope can be split between mechanical, electrical and automation contractors. Where provided, we review the sequence of operations and control points list, identify listed actuators, sensors and interfaces, and flag unclear scope boundaries for the contractor to confirm.
Do you estimate refrigerant piping for multi-zone VRF systems?
Where VRF line sets are shown, the takeoff can list piping runs and equipment by drawing reference. Refrigerant charge calculations and final equipment design are outside a standard quantity takeoff unless explicitly agreed in the written scope.
How do you estimate HVAC equipment and curb adapters?
We cross-reference the mechanical equipment schedules with roof architectural plans, quantifying RTUs, split systems, exhaust fans, roof curbs, vibration isolation springs, and motorized fire/smoke dampers.
Coordinate related trades
Large or confidential drawing sets? Arrange a suitable transfer method in the bid room.