2D Technical Drawings
How to generate, customize, and export 2D technical drawings with dimensions, annotations, and multiple views.
1. Overview
ExCoil automatically generates professional 2D technical drawings for every calculated coil. The drawings include front view and side view with full dimension annotations, following industry-standard engineering drawing conventions. These drawings are suitable for manufacturing, procurement, and installation documentation.
2. Available Views
Front View
Shows the coil face as seen from the air inlet side. Includes:
- FH (Fin Height) and FL (Fin Length) — finned surface dimensions
- CH (Casing Height) and CL (Casing Length) — overall casing dimensions
- OAL (Overall Length) — total length including headers
- Connection positions (Supply and Return)
- Air flow direction arrows
Side View
Shows the coil depth profile. Includes:
- CD (Coil Depth) — depth of the finned section
- Number of rows visible in cross-section
- Header extensions and connection sizes
3. Dimension Reference
| Abbreviation | Name | Description |
|---|---|---|
| FH | Fin Height | Height of the finned surface = tubes × Pt + margin |
| FL | Fin Length | Length of the finned surface (coil width) |
| CH | Casing Height | FH + 2 × casing margin (typically 38.1 mm) |
| CL | Casing Length | FL + 2 × casing margin |
| CD | Coil Depth | Number of rows × longitudinal pitch (Pl) |
| OAL | Overall Length | Total length including header extensions |
4. Dimension Editing
ExCoil allows you to customize certain dimensions after calculation:
- Casing margins can be adjusted for custom enclosures
- Header extension lengths can be modified
- Connection positions can be repositioned
Changes to dimensions are saved with the project and reflected in PDF exports. The drawing automatically updates when you modify coil geometry parameters.
5. PDF Export
Technical drawings are included in the PDF report generated from the calculator. The report includes both views with all dimensions, the coil code, and construction specifications. Use the 'PDF Report' button in the calculator toolbar to generate and download.