Free Tool
Free HVAC change order generator
Fill in the extra work, add your cost lines, and download a clean HVAC change order. Includes worded reasons for ductwork changes, equipment substitutions, and code items. Free, no signup.
Trade
Document options
Your company
Project & client
Change order details
Cost breakdown
Contract summary
CHANGE ORDERCONTRACT MODIFICATION
From (Contractor)
Project
Description of change
Cost breakdown
| Description | Qty | Unit | Amount |
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Private by design. Everything you type stays in your browser. Nothing is uploaded, stored, or seen by us.
Write it up before you do it
The change orders that get paid are the ones written before the work, not after. This tool makes that fast.
Pick a reason and it fills in the wording. A ductwork or airflow deficiency you found in the field. An equipment substitution because the specified unit is not available. A code item the inspector wants. Edit it to fit the job.
Add your cost lines and your markup, and it does the overhead and profit math and the total. Keep it simple for a homeowner, or turn on the contract summary and approval lines for a commercial job.
Download the branded PDF and get the signature first. That signature is the difference between billed extra work and free extra work.
HVAC Change Order Generator questions
Is this really free?
Yes. No email, no signup, and nothing you type leaves your browser.
Can it word the change for me?
Yes. Pick a reason template like a ductwork or airflow deficiency, an equipment substitution, or a code requirement, then edit it to match the job.
Does it do the overhead and profit math?
Yes. Add your cost lines and set your markup percent. It figures the overhead and profit and the change order total for you.
Can I change the checklist?
Everything is editable: items, sections, order, and printed columns. The starter list is a starting point, not a cage.
Price the change, get it signed
Werx logs and prices change orders and adds them to the next invoice. 14-day free trial, no credit card.
No credit card required · Free migration assistance · Cancel anytime
Disclaimer: These free tools and templates are provided for general information and estimating purposes only. All results — including quantities, material and cost estimates, load, sizing, and span figures, scores, and any guidance or warnings — are rough approximations that may not fit your specific project, site conditions, local building codes, or current prices. They are not engineering, architectural, structural, legal, financial, or other professional advice, and are not a substitute for a licensed engineer, architect, contractor, or other qualified professional. Always confirm quantities, sizing, and structural, electrical, mechanical, and code requirements with a licensed professional and your local authority having jurisdiction before purchasing materials or performing any work. Werx makes no warranty as to accuracy and accepts no liability for any decision made using these tools. Use at your own risk. See our Terms of Service.