Calculate free. Export with Pro.
All heat exchanger calculators are free, forever. Upgrade to export reports, save projects, and generate technical drawings.
Free
All calculators, no time limit
- All heat exchanger calculators
- Psychrometric calculator
- Real-time results
- SI & Imperial units
- All refrigerants & fluids
- Dehumidifier builder
- PDF & CSV report export
- Project saving
- 2D technical drawings
- 3D visualization & STL
Professional
Export, save, and deliver to clients
- Everything in Free
- Unlimited project saving
- PDF & CSV report export
- 2D technical drawings (PDF)
- Custom branding on reports
- Version history
- Email support
- 3D visualization & STL export
- Batch calculations
Enterprise
For teams and engineering firms
- Everything in Professional
- 3D visualization & STL export
- Batch calculations
- Up to 5 user accounts
- Priority support
- API access
- Custom integrations
- AI Intelligence Analysis
Manufacturer
For coil manufacturers & OEMs
- Everything in Enterprise
- AI Intelligence Analysis
- LLM Circuitry Design
- AI Optimization Engine
- Before/After comparison
- Dedicated support
Academic Program
ExCoil offers free Enterprise-level access to students, professors, and researchers at accredited educational institutions. Full access to all HVAC engineering tools, 3D visualization, STEP/STL export, and batch calculations for coursework, research, and academic projects.
What's Included
Applications are reviewed manually. You may be asked to provide proof of enrollment or academic affiliation. Access is granted at our discretion.
Apply for Academic Access
Feature comparison
| Feature | Free | Professional | Enterprise | Manufacturer |
|---|---|---|---|---|
| DX Evaporator | ||||
| DX Condenser | ||||
| Chilled Water Coil | ||||
| Hot Water Coil | ||||
| Steam Coil | ||||
| Dry Cooler | ||||
| Psychrometric Calculator | ||||
| Dehumidifier Builder | ||||
| All Refrigerants & Fluids | ||||
| Project Saving | ||||
| PDF & CSV Reports | ||||
| 2D Technical Drawings | ||||
| Custom Branding | ||||
| Version History | ||||
| 3D Visualization & STL | ||||
| Batch Calculations | ||||
| API Access | ||||
| AI Intelligence Analysis | ||||
| LLM Circuitry Design | ||||
| Team Members | 1 | 1 | Up to 5 | Unlimited |
Frequently asked questions
What's included in the Free plan?
Full access to all heat exchanger calculators (DX Evaporator, DX Condenser, Chilled Water, Hot Water, Steam, Dry Cooler), psychrometric calculator, all refrigerants and fluids. No time limit. Paid plans add report export, project saving, and technical drawings.
Can I calculate everything for free?
Yes. All calculators work fully on the free plan with real-time results. The paid plan is only needed to export PDF reports, save projects, and generate 2D/3D drawings.
Do you offer an academic program?
Yes! Students, professors, and researchers at accredited institutions can apply for free Professional-level access. Scroll up to the Academic Program section to apply.
What payment methods do you accept?
All major credit cards (Visa, Mastercard, American Express) through Stripe.
Can I cancel my subscription?
Yes, cancel anytime. You keep access until the end of your billing period, then revert to the Free plan.
Do you offer annual billing?
Contact us for annual billing options with up to 20% discount.
Start calculating
All calculators are free. Create your account and start designing heat exchangers.