About ExCoil
ExCoil is a comprehensive SaaS platform for thermal analysis and selection of heat exchangers. Designed by engineers, for engineers, with industry-standard calculation methods and professional reporting tools.
Our Mission
We believe that professional engineering tools should be accessible, accurate, and easy to use. ExCoil provides HVAC&R engineers with powerful calculation capabilities without the complexity of traditional desktop software.
Our platform combines rigorous thermodynamic calculations with an intuitive user interface, enabling engineers to design and select heat exchangers with confidence.
Whether you're sizing a simple evaporator coil or designing a complete dehumidification system with automatic compressor selection, ExCoil provides the tools you need.
Heat Exchanger Calculators
ExCoil supports five types of heat exchangers, covering all major HVAC&R applications from direct expansion systems to hydronic heating and steam coils.
Direct expansion cooling coils with segmented finite-volume solver, wet/dry coil detection, and two-phase refrigerant modeling.
Air-cooled condensers with 3-zone solver: desuperheat, condensation, and subcooling zones with automatic energy balance.
Chilled water coils with NTU-effectiveness method, glycol mixtures support, and dehumidification analysis.
Hot water heating coils with sensible heating capacity calculation, variable water temperatures, and pressure drop analysis.
Steam heating coils with Nusselt film condensation correlations, RATING and SIZING modes, and steam trap sizing.
Multi-coil simulation for AHU batteries. Chain multiple coils in series with psychrometric chart visualization.
Copeland ZP Compressor Database
Dehumidifier Builder
Design complete dehumidification systems with automatic compressor selection. The Dehumidifier Builder combines evaporator and condenser calculations with an intelligent compressor matching algorithm.
- Automatic Copeland ZP compressor selection
- Energy balance verification
- Psychrometric chart visualization
- PDF report with full specifications
Project Manager
Organize your heat exchanger calculations into projects with full client management, activity tracking, and comprehensive PDF reports.
- Group multiple heat exchangers per project
- Client details (name, email, phone)
- Equipment model and responsible person
- Priority levels and deadlines
- Comments and activity tracking
- Project PDF reports with all specifications
Engineering Methodology
ExCoil uses industry-standard correlations and methods validated against real-world data. Every calculation is verified through energy balance checks.
- Segmented finite-volume solver
- Two-phase heat transfer correlations
- NTU-effectiveness method
- Nusselt film condensation
- Air-side correlations (Wang et al.)
- Refrigerant-side correlations
- R410A - Common residential/commercial
- R32 - Low GWP alternative
- R134a - Automotive and commercial
- R290 (Propane) - Natural refrigerant
- R1234yf - Low GWP automotive
- R22 - Legacy systems support
Professional PDF Reports
Generate comprehensive PDF reports for individual heat exchangers or complete projects with all specifications and performance data.
Individual Heat Exchanger Report
- • Model code and specifications
- • Performance data (capacity, SHR, pressure drops)
- • Air conditions (inlet/outlet)
- • Refrigerant conditions
- • Coil geometry details
- • Heat transfer coefficients
Project Report
- • Project summary and client details
- • All heat exchangers with full data
- • Performance comparison table
- • Equipment specifications
- • Responsible person and dates
- • Comments and notes
Why Choose ExCoil?
Fast & Accurate
Get results in seconds with our optimized calculation engine. Energy balance verified to 0.00% error.
Secure & Reliable
Your data is encrypted and backed up automatically. Access your projects from anywhere.
Built for Engineers
Designed by HVAC&R engineers with real-world experience. Professional tools without the complexity.