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Software by trade · HVAC and mechanical contractor

HVAC and mechanical contractor software: what to run, what to track, and where jobs lose money

Mechanical contractors carry some of the largest equipment commitments in a building — air handlers, chillers, rooftop units — ordered months ahead against a schedule that moves. Add shop fabrication for ductwork and piping, and field labor that depends on other trades being out of the way, and a mechanical job can look fine on cost to date while its forecast is already over.

Updated · 7 minute read

Key takeaways
  • Equipment is committed months ahead — committed cost belongs in the forecast.
  • Split shop fabrication from field installation on separate codes.
  • Service agreements are their own business line with their own margin.
  • Tie long-lead equipment to the schedule so a slip shows its cost.

Where HVAC and mechanical contractor jobs make and lose money

Key terms: Committed cost · Cost code · Estimate at completion (EAC) · Over-billing

A worked example

Equipment was estimated at $820,000. Purchase orders so far total $865,000, and $120,000 of equipment is still to buy with about 4% escalation expected:

Committed against estimate+$45,000
Escalation on the rest = $120,000 × 4%$4,800
Forecast equipment variance+$49,800

None of this is in cost to date until invoices arrive — which is why mechanical jobs look fine right up to the chiller invoice.

CalculatorEquipment commitment check
equipment estimate $820,000committed on POs · $865,000+$49,800incl. 4% escalation on $120,000 still to buyCost to date: none of this until the invoices arrive
The worked example: the overrun is already committed on purchase orders while cost to date shows nothing — why mechanical jobs look fine right up to the chiller invoice.

The HVAC and mechanical contractor software stack

Most contractors in this trade run four or five systems. The names below are common examples, not a ranking.

Estimating
Mechanical estimatingtakeoff tools
Project management
ProcoreeSUBAutodesk Forma
Service
ServiceTitanFieldEdgesimilar
Accounting
Sage 300 CREViewpointFoundationQuickBooks

The numbers worth tracking weekly

How to choose HVAC and mechanical contractor software

Five questions to ask any vendor before a trial — each is about whether the software fits how this trade actually makes money.

  1. Are equipment purchase orders visible as committed cost the day they are placed?
  2. Can shop fabrication and field installation be costed separately?
  3. Does service agreement revenue and cost report apart from projects?
  4. Can long-lead equipment dates be tied to the schedule?
  5. Does it handle both residential service and commercial project billing if you do both?

Then trial it on a finished job where you already know the answer. The construction tech stack guide covers how the pieces connect.

Where Constructelligence fits

Constructelligence sits on top of the accounting system you already run — Sage 300 CRE and QuickBooks Desktop are connected today, with Viewpoint, Sage Intacct and others in build — and forecasts every job weekly by cost code, so committed equipment or field labor pushing a job over shows up in the week it starts. It reads read-only, installs on your own infrastructure and replaces none of the tools above. See it in the demo.

Software for other trades

Checklist
Mechanical equipment log in Excel, filled in with example rows — columns: Job, Equipment, Estimate, PO amount, PO date, Promised delivery, Needed on site, Invoiced…
The mechanical equipment log as it opens in Excel: example rows in italics, calculated columns shaded.
Free template · Mechanical equipment log (Excel & CSV)An Excel workbook with drop-downs, validation and formulas built in — or the same columns as a CSV for Google Sheets and Numbers.
Download Excel (.xlsx)
What this template captures

Each equipment item with its estimate, PO amount and date, promised and needed dates, invoiced amount and the variance calculated.

9 columns: 8 you fill in and 1 calculated by formula and filled down 200 rows, so nothing is worked out by hand. In the Excel version, 6 columns reject entries of the wrong type (a date column only takes dates, an amount column only numbers), the header row stays frozen with filters on it, and the workbook opens on an Instructions sheet that lists every column below.

Every column, and how it is captured
ColumnTypeWhat goes in it
JobTextJob number exactly as in your accounting system (e.g. J-1104), so rows join to job cost.
EquipmentTextFree text.
EstimateAmount ($)Enter the amount in dollars.
PO amountAmount ($)Enter the amount in dollars.
PO dateDateEnter the date.
Promised deliveryDateEnter the date.
Needed on siteDateEnter the date.
InvoicedAmount ($)Enter the amount in dollars.
VarianceCalculatedCalculated: [PO amount] − [Estimate]

See it on real-looking numbers

Constructelligence is a construction intelligence platform: it reads your ERP, project and field systems read-only and does this arithmetic every week, for every job. The demo runs it on a sample eight-job portfolio.

Try the demoJoin the private beta

Frequently asked questions

What software do HVAC contractors use?

Residential and service-led HVAC contractors often use field service software such as ServiceTitan or FieldEdge. Commercial mechanical contractors add construction project management, mechanical estimating and construction accounting such as Sage 300 CRE, Viewpoint or Foundation.

How do mechanical contractors control job cost?

By tracking committed equipment and material against the estimate, splitting shop fabrication from field install, measuring labor productivity weekly and forecasting each job's cost at completion.

Why does committed cost matter for mechanical contractors?

Equipment is ordered long before it is invoiced. Without committed cost in the forecast, a job looks under budget until the invoice for a chiller arrives.

What is committed cost?

Cost you have agreed to but not yet been invoiced for — purchase orders and subcontracts. For mechanical contractors with large equipment orders, it is often the biggest part of the forecast.

Can one system run HVAC service and mechanical projects?

Some platforms cover both; many contractors run field service software for service and maintenance agreements and construction accounting for projects, with reporting across the two.

CI
Written by the Constructelligence teamConstruction finance and software. Worked examples use the sample demo portfolio; formulas are standard practice. Reviewed September 2026.
Job cost forecasting: how to forecast a job’s cost at completionHow contractors forecast cost at completion (EAC): the four methods, the formulas, a worked example, the mistakes that hide overruns, and how forecasting from past jobs helps.Construction accounting software and ERP: the main systems and how to chooseConstruction accounting software and ERP compared for 2026 — Sage 300 CRE, Sage Intacct Construction, Viewpoint Vista and Spectrum, Foundation, CMiC, Acumatica, QuickBooks — the features that matter and how to choose.Construction scheduling software: Primavera P6, Microsoft Project and the restConstruction scheduling software compared — Primavera P6, Microsoft Project, Asta Powerproject, Smartsheet and linear scheduling — when each fits, what a healthy schedule looks like, and the DCMA checks.

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